Re: [kernel-hardening] Re: [PATCH v2 1/3] Add the latent_entropy gcc plugin

On 6 Jun 2016 at 7:38, David Brown wrote: > On Fri, Jun 03, 2016 at 07:42:52PM +0200, Emese Revfy wrote: > >On Wed, 1 Jun 2016 12:42:27 -0700 > >Andrew Morton wrote: > > > >> I don't think I'm really understanding. Won't this produce the same > >> value on each and every boot? > > > >No, because

Re: [PATCH v3] sched: fix first task of a task group is attached twice

On 01/06/16 16:54, Vincent Guittot wrote: > On 1 June 2016 at 17:31, Dietmar Eggemann wrote: >> On 30/05/16 16:52, Vincent Guittot wrote: >>> The cfs_rq->avg.last_update_time is initialize to 0 with the main effect >>> that the 1st sched_entity that will be attached, will keep its >> >> attached i

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On 6/6/2016 3:31 PM, Dan Williams wrote: > On Mon, Jun 6, 2016 at 12:25 PM, Linda Knippers > wrote: >> On 6/4/2016 4:52 PM, Dan Williams wrote: >>> There are scenarios where we need a middle ground between disabling all >>> manual bind/unbind attempts (via driver->suppress_bind_attrs) and >>> a

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On Mon, Jun 6, 2016 at 12:31 PM, Dan Williams wrote: > On Mon, Jun 6, 2016 at 12:25 PM, Linda Knippers > wrote: >> On 6/4/2016 4:52 PM, Dan Williams wrote: >>> There are scenarios where we need a middle ground between disabling all >>> manual bind/unbind attempts (via driver->suppress_bind_attrs

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On Mon, Jun 6, 2016 at 12:36 PM, Linda Knippers wrote: > > > On 6/6/2016 3:31 PM, Dan Williams wrote: >> On Mon, Jun 6, 2016 at 12:25 PM, Linda Knippers >> wrote: >>> On 6/4/2016 4:52 PM, Dan Williams wrote: There are scenarios where we need a middle ground between disabling all manual

[PATCH 02/10] mm: swap: unexport __pagevec_lru_add()

There is currently no modular user of this function. We used to have filesystems that open-coded the page cache instantiation, but luckily they're all streamlined, and we don't want this to come back. Signed-off-by: Johannes Weiner --- mm/swap.c | 1 - 1 file changed, 1 deletion(-) diff --git a

[PATCH 07/10] mm: base LRU balancing on an explicit cost model

Currently, scan pressure between the anon and file LRU lists is balanced based on a mixture of reclaim efficiency and a somewhat vague notion of "value" of having certain pages in memory over others. That concept of value is problematic, because it has caused us to count any event that remotely mak

[PATCH 00/10] mm: balance LRU lists based on relative thrashing

Hi everybody, this series re-implements the LRU balancing between page cache and anonymous pages to work better with fast random IO swap devices. The LRU balancing code evolved under slow rotational disks with high seek overhead, and it had to extrapolate the cost of reclaiming a list based on in

[PATCH 04/10] mm: fix LRU balancing effect of new transparent huge pages

Currently, THP are counted as single pages until they are split right before being swapped out. However, at that point the VM is already in the middle of reclaim, and adjusting the LRU balance then is useless. Always account THP by the number of basepages, and remove the fixup from the splitting p

[PATCH 08/10] mm: deactivations shouldn't bias the LRU balance

Operations like MADV_FREE, FADV_DONTNEED etc. currently move any affected active pages to the inactive list to accelerate their reclaim (good) but also steer page reclaim toward that LRU type, or away from the other (bad). The reason why this is undesirable is that such operations are not part of

Re: [RFC PATCH 2/2] tracing: add sched_set_prio tracepoint

- On May 30, 2016, at 9:18 AM, Mathieu Desnoyers mathieu.desnoy...@efficios.com wrote: > - On May 27, 2016, at 5:16 PM, Julien Desfossez jdesfos...@efficios.com > wrote: > >> This tracepoint allows to keep track of all priority changes made by all >> sites that can change this value. The

[PATCH 10/10] mm: balance LRU lists based on relative thrashing

Since the LRUs were split into anon and file lists, the VM has been balancing between page cache and anonymous pages based on per-list ratios of scanned vs. rotated pages. In most cases that tips page reclaim towards the list that is easier to reclaim and has the fewest actively used pages, but the

[PATCH 06/10] mm: remove unnecessary use-once cache bias from LRU balancing

When the splitlru patches divided page cache and swap-backed pages into separate LRU lists, the pressure balance between the lists was biased to account for the fact that streaming IO can cause memory pressure with a flood of pages that are used only once. New page cache additions would tip the bal

[PATCH 05/10] mm: remove LRU balancing effect of temporary page isolation

Isolating an existing LRU page and subsequently putting it back on the list currently influences the balance between the anon and file LRUs. For example, heavy page migration or compaction could influence the balance between the LRUs and make one type more attractive when that type of page is affec

[PATCH 03/10] mm: fold and remove lru_cache_add_anon() and lru_cache_add_file()

They're the same function, and for the purpose of all callers they are equivalent to lru_cache_add(). Signed-off-by: Johannes Weiner --- fs/cifs/file.c | 10 +- fs/fuse/dev.c| 2 +- include/linux/swap.h | 2 -- mm/shmem.c | 4 ++-- mm/swap.c| 40 +++

[PATCH 01/10] mm: allow swappiness that prefers anon over file

With the advent of fast random IO devices (SSDs, PMEM) and in-memory swap devices such as zswap, it's possible for swap to be much faster than filesystems, and for swapping to be preferable over thrashing filesystem caches. Allow setting swappiness - which defines the relative IO cost of cache mis

Re: [PATCH] perf test: Ignore .scale and other special files

Em Mon, Jun 06, 2016 at 09:31:16AM -0700, Andi Kleen escreveu: > > [root@jouet ~]# perf stat -e > > topdown-total-slots:u,cpu/event=topdown-total-slots/u usleep 1 > > event syntax error: 'topdown-total-slots:u,cpu/event=topdown-total-slots/u' > > \___ parser error > >

[PATCH] x86/mm: Change barriers before TLB flushes to smp_mb__after_atomic

When (current->active_mm != mm), flush_tlb_page() does not perform a memory barrier. In practice, this memory barrier is not needed since in the existing call-sites the PTE is modified using atomic-operations. This patch therefore modifies the existing smp_mb in flush_tlb_page to smp_mb__after_atom

Re: [PATCH 5/7] mtd: nand: Add Hynix H27UBG8T2BTR-BC to nand_ids table

On Mon, 6 Jun 2016 20:55:49 +0200 Boris Brezillon wrote: > On Mon, 6 Jun 2016 13:24:22 +0300 > Aleksei Mamlin wrote: > > > Add the full description of the Hynix H27UBG8T2BTR-BC NAND chip in the > > nand_ids table so that we can later use the NAND ECC infos and ONFI timings > > mode in controll

[PATCH 09/10] mm: only count actual rotations as LRU reclaim cost

Noting a reference on an active file page but still deactivating it represents a smaller cost of reclaim than noting a referenced anonymous page and actually physically rotating it back to the head. The file page *might* refault later on, but it's definite progress toward freeing pages, whereas rot

performance delta after VFS i_mutex=>i_rwsem conversion

tl;dr: Mutexes spin more than than rwsems which makes mutexes perform better when contending ->i_rwsem. But, mutexes do this at the cost of not sleeping much, even with tons of contention. Should we do something to keep rwsem and mutex performance close to each other? If so, should mutexes be sl

Re: [RFC v3 09/45] c6x: dma-mapping: Use unsigned long for dma_attrs

On Thu, 2016-06-02 at 17:39 +0200, Krzysztof Kozlowski wrote: > Split out subsystem specific changes for easier reviews. This will be > squashed with main commit. > > Signed-off-by: Krzysztof Kozlowski > --- Acked-by: Mark Salter >  arch/c6x/include/asm/dma-mapping.h | 4 ++-- >  arch/c6x/kerne

[RFC 1/2] acpi: Expose acpi_of_match_device

This can be used by device drivers as the equivalent of of_match_device when they are instantiated through ACPI using devicetree IDs. This is described in Documentation/acpi/enumeration.txt Signed-off-by: Crestez Dan Leonard --- drivers/acpi/bus.c | 13 +++-- include/linux/acpi.h | 8

Re: [PATCH v4 1/5] locking/rwsem: Add reader-owned state to the owner field

On 06/06/2016 01:18 PM, Davidlohr Bueso wrote: Hi Ingo -- is there any reason why this series (or at least this particular patch) was not picked up (being in Peter's queue)? It seems that all the recent rwsem changes are now in -tip, with the exception of these. Thanks, Davidlohr Yes, I would

[RFC 2/2] i2c: Pass i2c_device_id to probe func when using DT ids through ACPI

When devices are instatiated through devicetree the i2c_client->name is set to the compatible string with company name stripped out. This is then matched to the i2c_device_id table to pass the device_id to the probe function. This id parameter is used by some device drivers to differentiate between

[RFC 0/2] Match i2c_device_id when using DT ids through ACPI

Linux supports instantiating devices using devicetree ids from ACPI by setting the id to PRP0001 and adding the devicetree compatible string in _DSD properties. This is described in Documentation/acpi/enumeration.txt. I've tried to use this feature using custom ACPI tables and one issue I encounte

Re: linux-next: error fetching the c6x tree

On Mon, 2016-06-06 at 00:18 +1000, Stephen Rothwell wrote: > Hi Mark, > > Fetching the c6x tree has produced this error for the past few days: > > fatal: Could not read from remote repository. > > Please make sure you have the correct access rights > and the repository exists. > Thanks. TI is

Re: [RFC PATCH 0/4] Make inotify instance/watches be accounted per userns

Nikolay Borisov writes: > On 06/03/2016 11:41 PM, Eric W. Biederman wrote: >> Nikolay Borisov writes: >> >>> On 06/02/2016 07:58 PM, Eric W. Biederman wrote: Nikolay please see my question for you at the end. >> [snip] All of that said there is definitely a practical question th

[PATCH] arm64: dts: apm: Use lowercase consistently for hex constants

The convention in these files is to use lowercase for "0x" prefixes and for the hex constants themselves, but a few changes didn't follow that convention, which makes the file annoying to read. Use lowercase consistently for the hex constants. No functional change intended. Signed-off-by: Bjorn

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On 6/6/2016 3:46 PM, Dan Williams wrote: > On Mon, Jun 6, 2016 at 12:36 PM, Linda Knippers > wrote: >> >> >> On 6/6/2016 3:31 PM, Dan Williams wrote: >>> On Mon, Jun 6, 2016 at 12:25 PM, Linda Knippers >>> wrote: On 6/4/2016 4:52 PM, Dan Williams wrote: > There are scenarios where we

Re: [PATCH 07/10] mm: base LRU balancing on an explicit cost model

Hi, [auto build test ERROR on cifs/for-next] [also build test ERROR on v4.7-rc2 next-20160606] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Johannes-Weiner/mm-balance-LRU-lists-based-on

Re: [BUGFIX][PATCH v6 1/9] perf config: Fix the problem of abnormal termination at perf_parse_file()

Em Mon, Jun 06, 2016 at 07:52:52PM +0900, Taeung Song escreveu: > For example, > > If user config file has a wrong value 'red;default' > instead of a normal value like 'red, default' for a key 'colors.top', > > # cat ~/.perfconfig > [colors] > medium = red;default # wrong value >

Re: linux-next: build failure after merge of the akpm-current tree

On Mon, 6 Jun 2016 14:03:27 +1000 Stephen Rothwell wrote: > In file included from include/linux/crash_dump.h:5:0, > from arch/powerpc/kernel/crash_dump.c:14: > include/linux/kexec.h:358:9: note: previous implicit declaration of > 'phys_to_virt' was here > return phys_to_virt(

Re: [BUGFIX][PATCH v6 2/9] perf config: If collect_config() is failed, finally free a config set after it is done

Em Mon, Jun 06, 2016 at 07:52:53PM +0900, Taeung Song escreveu: > Because of die() at perf_parse_file() a config set was freed > in collect_config(), if failed. > But it is natural to free a config set after collect_config() is done > when some problems happened. > > So, in case of failure, lastly

[PATCH 2/2] ARM: dts: exynos: Fix port nodes names for Exynos5420 Peach Pit board

Commit bea7eef6949c ("ARM: dts: exynos: Fix DTC unit name warnings in Peach Pit") fixed the DTC warnings about mismatches between unit names and reg properties in the Exynos5420 Peach Pit DTS. But unfortunately it also added a regression on the Peach Pit when changing the port node names since the

[PATCH 1/2] ARM: dts: exynos: Fix port nodes names for Exynos5250 Snow board

Commit 5c9cbade0629 ("ARM: dts: exynos: Fix DTC unit name warnings in Exynos5250") fixed all the DTC warnings about mismatchs between unit names and reg properties in Exynos5250 boards DTS. But unfortunately it also added a regression on the Exynos5250 Snow Chromebook when changing the port node n

[PATCH 0/2] ARM: dts: exynos: Fix port nodes names for Snow and Peach Pit DTS

Hello Krzysztof, This small series fixes the lookup for the lvds-to-eDP bridge found in the Exynos5250 Snow and Exynos5420 Peach Pit Chromebooks. The problem was introduced by the commits that fixed the recent DTC warnings and it was that the OF graph logic expects the nodes to always be called 'p

Re: [BUGFIX][PATCH v6 3/9] perf config: Handle the error when config set is NULL at collect_config()

Em Mon, Jun 06, 2016 at 07:52:54PM +0900, Taeung Song escreveu: > collect_config() collect all config key-value pairs > from config files and put each config info in config set. > But if config set (i.e. 'set' variable at collect_config()) > is NULL, this is wrong so handle it. Looks ok, applied.

ipv4: Constrain UFO fragment sizes to multiples of 8 bytes

Back in 2011, Bill Sommerfeld submitted an update to prevent ip_append_data to create malformed packets: Commit: d9be4f7a6f5a8da3133b832eca41c3591420b1ca Now we're finding that we need to apply the same logic to ip_append_page to get nfs to work with udp when UFO is enabled: diff --git a/net/

Re: undefined reference to `early_panic'

On Sun, 5 Jun 2016 12:33:29 +0800 kbuild test robot wrote: > It's probably a bug fix that unveils the link errors. > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > master > head: 049ec1b5a76d34a6980cccdb7c0baeb4eed7a993 > commit: 888cdbc2c9a76a0e450f533b1957cd

Re: [PATCH 5/7] mtd: nand: Add Hynix H27UBG8T2BTR-BC to nand_ids table

On Mon, 6 Jun 2016 22:59:03 +0300 Aleksei Mamlin wrote: > On Mon, 6 Jun 2016 20:55:49 +0200 > Boris Brezillon wrote: > > > On Mon, 6 Jun 2016 13:24:22 +0300 > > Aleksei Mamlin wrote: > > > > > Add the full description of the Hynix H27UBG8T2BTR-BC NAND chip in the > > > nand_ids table so th

Re: [PATCH 10/10] mm: balance LRU lists based on relative thrashing

Hi, [auto build test ERROR on cifs/for-next] [also build test ERROR on v4.7-rc2 next-20160606] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Johannes-Weiner/mm-balance-LRU-lists-based-on

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On Mon, Jun 6, 2016 at 1:20 PM, Linda Knippers wrote: [..] >> A solution to the posted-write-queue flushing needs to be available >> and a platform can choose to use flush hints or ADR. If the NFIT >> defines an NVDIMM device without hints we assume the platform must >> have ADR. If the platform

Re: [PATCH v2] fpga: FPGA_MGR_ZYNQ_FPGA should depend on HAS_DMA

Hi Alan, Geert On Mon, Jun 6, 2016 at 11:02 AM, atull wrote: > On Sun, 5 Jun 2016, Geert Uytterhoeven wrote: > >> If NO_DMA=y: >> >> ERROR: "bad_dma_ops" [drivers/fpga/zynq-fpga.ko] undefined! >> >> Add a dependency on HAS_DMA to fix this. >> >> Signed-off-by: Geert Uytterhoeven >> Reviewed-

Re: undefined reference to `early_panic'

On 6/6/2016 4:31 PM, Andrew Morton wrote: On Sun, 5 Jun 2016 12:33:29 +0800 kbuild test robot wrote: [...] arch/tile/built-in.o: In function `setup_arch': (.init.text+0x15d8): undefined reference to `early_panic' This? From: Andrew Morton Subject: tile: early_printk.o is always re

Re: FW: [RFC] Forcing 64-bits __OFF_T_TYPE and __INO_T_TYPE for new 32-bit architectures?

On Mon, Jun 06, 2016 at 10:03:49PM +0300, Pinski, Andrew wrote: > You may also want to look into this thread. It just got started too. > > -Original Message- > From: Andrew Pinski [mailto:pins...@gmail.com] > Sent: Monday, June 6, 2016 12:03 PM > To: Pinski, Andrew > Subject: Fwd: [RFC

[GIT PULL] drm-vc4-fixes-2016-06-06 for 4.7

Linux 4.7-rc1 (2016-05-29 09:29:24 -0700) are available in the git repository at: g...@github.com:anholt/linux.git tags/drm-vc4-fixes-2016-06-06 for you to fetch changes up to 56d1fe0979dc9b73c1c12ee07722ac380d42a0c4: drm/vc4: Make pageflip completion handling more robust. (2016-06-06 13:

linux-next: UBSAN whine and BUG in net/ipv4/fib_trie.c

Seeing this in next-20160606 (next-20160530 is fine), does it ring any bells before I spend a long evening doing a bisect? The Google doesn't seem to have seen this traceback in the past week [ 226.9

Re: [PATCH v3 00/12] usb/mmc/power: Generic power sequence (and fix USB/LAN when TFTP booting)

Hi, Am Mittwoch, 1. Juni 2016, 10:02:09 schrieb Krzysztof Kozlowski: > My third approach for a USB power sequence which fixes usb3503+lan > on Odroid U3 board if it was initialized by bootloader > (e.g. for TFTP boot). I was just tackling a similar bringup problem regarding an embedded usb hub a

Re: [PATCH] net: stmmac: dwmac-rk: keep PHY up for WoL

Hi, Am Freitag, 3. Juni 2016, 10:29:20 schrieb Vincent Palatin: > Do not shutdown the PHY if Wake-on-Lan is enabled, else it cannot wake > us up. > > Signed-off-by: Vincent Palatin > --- > drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 8 > 1 file changed, 8 insertions(+) > > diff -

Re: performance delta after VFS i_mutex=>i_rwsem conversion

On Mon, Jun 6, 2016 at 1:00 PM, Dave Hansen wrote: > > I tracked this down to the differences between: > > rwsem_spin_on_owner() - false roughly 1% of the time > mutex_spin_on_owner() - false roughly 0.05% of the time > > The optimistic rwsem and mutex code look quite similar, but

Re: [PATCH] ASoC: atmel: fix build failure

On Monday 06 June 2016 11:17 AM, Mark Brown wrote: On Sun, Jun 05, 2016 at 07:00:21PM +0100, Sudip Mukherjee wrote: m32r allmodconfig build is failing with the error: ERROR: "bad_dma_ops" [sound/soc/atmel/snd-soc-atmel-pcm-pdc.ko] undefined! The code is using DMA but the related dependency is n

Re: [PATCH] net: stmmac: dwmac-rk: keep PHY up for WoL

On Mon, Jun 6, 2016 at 1:45 PM, Heiko Stübner wrote: > Hi, > > Am Freitag, 3. Juni 2016, 10:29:20 schrieb Vincent Palatin: >> Do not shutdown the PHY if Wake-on-Lan is enabled, else it cannot wake >> us up. >> >> Signed-off-by: Vincent Palatin >> --- >> drivers/net/ethernet/stmicro/stmmac/dwmac-

Re: [PATCH v4 1/5] locking/rwsem: Add reader-owned state to the owner field

On Mon, Jun 06, 2016 at 10:18:16AM -0700, Davidlohr Bueso wrote: > Hi Ingo -- is there any reason why this series (or at least this particular > patch) was not picked up (being in Peter's queue)? It seems that all the > recent rwsem changes are now in -tip, with the exception of these. I placed it

Re: [RFC PATCH 2/2] tracing: add sched_set_prio tracepoint

On Mon, Jun 06, 2016 at 07:52:00PM +, Mathieu Desnoyers wrote: > - On May 30, 2016, at 9:18 AM, Mathieu Desnoyers > mathieu.desnoy...@efficios.com wrote: > Adding Ingo and Peter in CC, considering that it touches to tracing and > the scheduler. > >> +/* > >> + * Tracepoint for showing pr

[PATCH 03/11] tools lib api: Respect CROSS_COMPILE for the linker

From: Lucas Stach This fixes cross compilation of libapi. Signed-off-by: Lucas Stach Cc: Jiri Olsa Cc: ker...@pengutronix.de Cc: patchwork-...@pengutronix.de Link: http://lkml.kernel.org/r/1458235670-27341-1-git-send-email-l.st...@pengutronix.de Signed-off-by: Arnaldo Carvalho de Melo --- t

[PATCH] brcmfmac: drop unused pm_block vif attribute

This attribute was added 3 years ago by commit 3eacf866559c ("brcmfmac: introduce brcmf_cfg80211_vif structure") but it remains unused since then. It seems we can safely drop it. Signed-off-by: Rafał Miłecki --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 9 +++-- drivers/n

[PATCH 04/11] perf script: Show call graphs when 1st event doesn't have it but some other has

From: He Kuang There's a display inconsistency when there are multiple tracepoint events, some of which have the 'call-graph' config option set but the first one hasn't, i.e. the whole logic for call graph processing is enabled only if the first tracepoint event has call-graph set. For instance,

[PATCH 08/11] perf stat: Print topology/time headers with --metric-only

From: Andi Kleen When --metric-only is enabled there were no headers for the topology in interval mode. Also when headers were printed they were on a separate line. Before: $ perf stat --metric-only -A -I 1000 -a 1.001038376 frontend cycles idle insn per cycle stalled cycles per

[GIT PULL 00/11] perf/core improvements and fixes

://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-20160606 for you to fetch changes up to 7db91f251056f90fec4121f028680ab3153a0f3c: perf config: Handle the error when config set is NULL at collect_config() (2016-06-06 17:43:19 -0300

[PATCH 11/11] perf config: Handle the error when config set is NULL at collect_config()

From: Taeung Song collect_config() collect all config key-value pairs from config files and put each config info in config set. But if config set (i.e. 'set' variable at collect_config()) is NULL, this is wrong so handle it. Signed-off-by: Taeung Song Cc: Alexander Shishkin Cc: Jiri Olsa Cc:

[PATCH 01/11] perf evsel: Provide way to extract integer value from format_field

From: Arnaldo Carvalho de Melo Out of perf_evsel__intval(), that requires passing the variable name, that will then be searched in the list of tracepoint variables for the given evsel. In cases such as syscall file descriptor ("fd") tracking, this is wasteful, we need just to use perf_evsel__fie

[PATCH 02/11] perf evlist: Fix alloc_mmap() failure path

From: Wang Nan If zalloc fail, setting evlist->mmap[i].fd is unsafe and perf_evlist__alloc_mmap() should bail out right after that. Signed-off-by: Wang Nan Acked-by: Masami Hiramatsu Cc: He Kuang Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3or...@163.com Fixes: d4c6fb36ac2c ("perf ev

[PATCH 05/11] perf test: Ignore .scale and other special files

From: Andi Kleen 'perf test' tries to parse all entries in /sys/devices/cpu/events/. Ignore the special entries like '.scale', which cannot be directly parsed as an event. This patch assumes all files containing a '.' are special and can be ignored. Reported-by: Arnaldo Carvalho de Melo Signed-

[PATCH 06/11] perf stat: Basic support for TopDown in perf stat

From: Andi Kleen Add basic plumbing for TopDown in perf stat TopDown is intended to replace the frontend cycles idle/ backend cycles idle metrics in standard perf stat output. These metrics are not reliable in many workloads, due to out of order effects. This implements a new --topdown mode in

Re: [PATCH][RFC] x86, hotplug: Use zero page for monitor when resuming from hibernation

On 06/06/16 09:40, Peter Zijlstra wrote: > On Mon, Jun 06, 2016 at 03:59:06PM +, Chen, Yu C wrote: > + if (hibernation_in_resume()) + mwait_ptr = empty_zero_page; + else + mwait_ptr = ¤t_thread_info()->flags; >>> >>> Why is this conditional? Is there any

[PATCH 10/11] perf config: Fix abnormal termination at perf_parse_file()

From: Taeung Song If a config file has wrong key-value pairs, the perf process will be forcibly terminated by die() at perf_parse_file() called by perf_config() so terminal settings can be crushed because of unusual termination. For example: If user config file has a wrong value 'red;default' i

Re: [PATCH 5/7] mtd: nand: Add Hynix H27UBG8T2BTR-BC to nand_ids table

On Mon, 6 Jun 2016 22:31:38 +0200 Boris Brezillon wrote: > On Mon, 6 Jun 2016 22:59:03 +0300 > Aleksei Mamlin wrote: > > > On Mon, 6 Jun 2016 20:55:49 +0200 > > Boris Brezillon wrote: > > > > > On Mon, 6 Jun 2016 13:24:22 +0300 > > > Aleksei Mamlin wrote: > > > > > > > Add the full descr

[PATCH 09/11] perf stat: Add missing aggregation headers for --metric-only CSV

From: Andi Kleen When in CSV mode --metric-only outputs an header, unlike the other modes. Previously it did not properly print headers for the aggregation columns, so the headers were actually shifted against the real values. Fix this here by outputting the correct headers for CSV. v2: Indent

Re: [PATCH V3 0/9] cpufreq: Sort policy->freq_table

On Fri, Jun 3, 2016 at 3:35 PM, Viresh Kumar wrote: > Hi Rafael, > > So all my patches are contained in two series. The first one is: > > [PATCH V3 0/8] cpufreq: cleanups and reorganization > > which I have sent this morning. It does some cleanup and shall be > applied regardless of this series. >

[PATCH 07/11] perf stat: Add computation of TopDown formulas

From: Andi Kleen Implement the TopDown formulas in 'perf stat'. The topdown basic metrics reported by the kernel are collected, and the formulas are computed and output as normal metrics. See the kernel commit exporting the events for details on the used metrics. Committer note: Output example

Re: performance delta after VFS i_mutex=>i_rwsem conversion

On 06/06/2016 04:46 PM, Linus Torvalds wrote: On Mon, Jun 6, 2016 at 1:00 PM, Dave Hansen wrote: I tracked this down to the differences between: rwsem_spin_on_owner() - false roughly 1% of the time mutex_spin_on_owner() - false roughly 0.05% of the time The optimistic rwsem

Re: [PATCH 11/11] drm/amdgpu: remove now unnecessary checks

On Wed, Jun 1, 2016 at 9:10 AM, Christian König wrote: > From: Christian König > > vm_flush() now comes directly after vm_grab_id(). > > Signed-off-by: Christian König For the series: Acked-by: Alex Deucher > --- > drivers/gpu/drm/amd/amdgpu/amdgpu.h| 1 - > drivers/gpu/drm/amd/amdgpu/a

Re: [PATCH 01/13] driver core, libnvdimm: disable manual unbind of dimms while region active

On 6/6/2016 4:36 PM, Dan Williams wrote: > On Mon, Jun 6, 2016 at 1:20 PM, Linda Knippers wrote: > [..] >>> A solution to the posted-write-queue flushing needs to be available >>> and a platform can choose to use flush hints or ADR. If the NFIT >>> defines an NVDIMM device without hints we assu

[PATCH v2] IB/core: remove dead code

prot_sg_cnt has been assigned with the value of ret which we have already checked to be non-zero so prot_sg_cnt can never be zero at this point of the code and hence the else part can never execute. And since we know prot_sg_cnt is non zero there is no use for the if condition also. Signed-off-by:

Re: performance delta after VFS i_mutex=>i_rwsem conversion

On Mon, Jun 06, 2016 at 01:46:23PM -0700, Linus Torvalds wrote: > So my gut feel is that we do want to have the same heuristics for > rwsems and mutexes (well, modulo possible actual semantic differences > due to the whole shared-vs-exclusive issues). > > And I also suspect that the mutexes have

Re: performance delta after VFS i_mutex=>i_rwsem conversion

On Mon, Jun 6, 2016 at 2:13 PM, Waiman Long wrote: > > The tricky part about optimistic spinning in rwsem is that we don't know for > sure if any of the lock holding readers is running or not. I'm notm sure how common the reader-vs-writer contention is, at least for the new inode use. I'm sure yo

general preparation for NVMe over Fabrics support

This patch set adds some needed preparations for the upcoming NVMe over Fabrics support. Contains: - Allow transfer size limitations for NVMe transports - Add the get_log_page command definition required by the NVMe target - more helpers in core code that can be used by various transports - add so

[PATCH 04/10] nvme.h: add AER constants

Reviewed-by: Jay Freyensee Reviewed-by: Sagi Grimberg Reviewed-by: Ming Lin Signed-off-by: Christoph Hellwig --- include/linux/nvme.h | 6 ++ 1 file changed, 6 insertions(+) diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 9807d98..a9b8c7b 100644 --- a/include/linux/nvme.h +

[PATCH 02/10] nvme.h: Add get_log_page command strucure

From: Armen Baloyan Add get_log_page command structure and a corresponding entry in nvme_command union Signed-off-by: Armen Baloyan Reviewed-by: Jay Freyensee Reviewed--by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- include/linux/nvme.h | 19 +++ 1 file changed, 19 i

[PATCH 01/10] nvme.h: add RTD3R, RTD3E and OAES fields

These have been added in NVMe 1.2 and we'll need at least oaes for the NVMe target driver. Reviewed-by: Sagi Grimberg Reviewed-by: Jay Freyensee Signed-off-by: Christoph Hellwig --- include/linux/nvme.h | 5 - 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/nvme.

[PATCH 06/10] nvme: allow for size limitations from transport drivers

Some transport drivers may have a lower transfer size than the controller. So allow the transport to set it in the controller max_hw_sectors. Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 7 +-- 1 file changed, 5 insertions(+), 2 deletions(-) di

generic NVMe over Fabrics library support

This patch set adds the necessary infrastructure for the NVMe over Fabrics functionality and the NVMe over Fabrics library itself. First we add some needed parameters to NVMe request allocation such as flags (for reserved commands - connect and keep-alive), also support tag allocation of a given q

[PATCH 08/10] nvme: move the workaround for I/O queue-less controllers from PCIe to core

We want to apply this to Fabrics drivers as well, so move it to common code. Reviewed-by: Jay Freyensee Reviewed-by: Sagi Grimberg Tested-by: Ming Lin Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 17 ++--- drivers/nvme/host/pci.c | 10 +- 2 files change

[PATCH 10/10] nvme: move nvme_cancel_request() to core.c

From: Ming Lin So it can be used by fabrics driver as well. Signed-off-by: Ming Lin Reviewed-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 17 + drivers/nvme/host/nvme.h | 1 + drivers/nvme/host/pci.c | 16 3 files change

[PATCH 4/8] nvme: add fabrics sysfs attributes

- delete_controller: This attribute allows to delete a controller. A driver is not obligated to support it (pci doesn't) so it is created only if the driver supports it. The new fabrics drivers will support it (essentialy a disconnect operation). Usage: echo > /sys/class/nvme/nvme0/delet

[PATCH 09/10] nvme: update nvme_cancel_io() a bit

From: Ming Lin Pass in nvme_ctrl, so it can be used by the fabrics drivers also. Also update to upstream version and rename it to nvme_cancel_request. Signed-off-by: Ming Lin Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- drivers/nvme/host/pci.c | 9 + 1 file chang

[PATCH 1/8] blk-mq: add blk_mq_alloc_request_hctx

From: Ming Lin For some protocols like NVMe over Fabrics we need to be able to send initialization commands to a specific queue. Based on an earlier patch from Christoph Hellwig . Signed-off-by: Ming Lin Signed-off-by: Christoph Hellwig --- block/blk-mq.c | 33 +++

[PATCH 5/8] nvme.h: add NVMe over Fabrics definitions

The NVMe over Fabrics specification defines a protocol interface and related extensions to NVMe that enable operation over network protocols. The NVMe over Fabrics specification has an NVMe Transport binding for each NVMe Transport. This patch adds the fabrics related definitions: - fabric specifi

NVMe over Fabrics target implementation

This patch set adds a generic NVMe over Fabrics target. The implementation conforms to the NVMe 1.2b specification (which includes Fabrics) and provides the NVMe over Fabrics access to Linux block devices. The target implementation consists of several elements: - NVMe target core: defines and man

[PATCH 4/5] nvmet-rdma: add a NVMe over Fabrics RDMA target driver

This patch implements the RDMA transport for the NVMe over Fabrics target, which allows exporting NVMe over Fabrics functionality over RDMA fabrics (Infiniband, RoCE, iWARP). All NVMe logic is in the generic target and this module just provides a small glue between it and the generic code in the R

[PATCH 1/5] blk-mq: Introduce blk_mq_reinit_tagset

From: Sagi Grimberg The new nvme-rdma driver will need to reinitialize all the tags as part of the error recovery procedure (realloc the tag memory region). Add a helper in blk-mq for it that can iterate over all requests in a tagset to make this easier. Signed-off-by: Sagi Grimberg Tested-by:

[PATCH] usb: usbip: remove null check

The only caller of get_gadget_descs() has already dereferenced udc before calling this function, so udc can not be NULL at this point of the code and hence no use of checking it. Signed-off-by: Sudip Mukherjee --- drivers/usb/usbip/vudc_sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(

[PATCH 3/3] nvme-loop: add a NVMe loopback host driver

This patch implements adds nvme-loop which allows to access local devices exported as NVMe over Fabrics namespaces. This module can be useful for easy evaluation, testing and also feature experimentation. To createa nvme-loop device you need to configure the NVMe target to export a loop port (see

[PATCH 8/8] nvme: add keep-alive support

Periodic keep-alive is a mandatory feature in NVMe over Fabrics, and optional in NVMe 1.2.1 for PCIe. This patch adds periodic keep-alive sent from the host to verify that the controller is still responsive and vice-versa. The keep-alive timeout is user-defined (with keep_alive_tmo connection par

[PATCH 5/5] nvme-rdma: add a NVMe over Fabrics RDMA host driver

This patch implements the RDMA host (initiator in SCSI speak) driver. It can be used to connect to remote NVMe over Fabrics controllers over Infiniband, RoCE or iWarp, and uses the existing NVMe core driver as well a the new fabrics library. To connect to all NVMe over Fabrics controller reachabl

[PATCH 1/3] block: Export blk_poll

From: Sagi Grimberg The new NVMe over fabrics target will make use of this outside from a module. Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- block/blk-core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/blk-core.c b/block/blk-core.c index 2475b1c7..ad5270e

[PATCH 2/3] nvmet: add a generic NVMe target

This patch introduces a implementation of NVMe subsystems, controllers and discovery service which allows to export NVMe namespaces across fabrics such as Ethernet, FC etc. The implementation conforms to the NVMe 1.2.1 specification and interoperates with NVMe over fabrics host implementations. C

[PATCH 7/8] nvme.h: Add keep-alive opcode and identify controller attribute

From: Sagi Grimberg KAS: keep-alive support and granularity of kato in units of 100 ms nvme_admin_keep_alive opcode: 0x18 Signed-off-by: Sagi Grimberg Signed-off-by: Christoph Hellwig --- include/linux/nvme.h | 6 +- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/lin

[PATCH 3/5] nvme-rdma.h: Add includes for nvme rdma_cm negotiation

From: Sagi Grimberg NVMe over Fabrics RDMA transport defines a connection establishment protocol over the RDMA connection manager. This header will be used by both the host and target drivers to negotiate the connection establishment parameters. Signed-off-by: Jay Freyensee Signed-off-by: Ming

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