Hi Daniel,
On Tue, Mar 12, 2019 at 12:27:11PM +, Daniel Thompson wrote:
> On Sat, Mar 09, 2019 at 07:26:34AM +0530, Manivannan Sadhasivam wrote:
> > For the AMBA Primecell devices having the reset lines wired, it is
> > necessary to take them out of reset before reading the pid and cid values.
From: Kirill Tkhai
Sent: 18 March 2019 16:08
To: Pankaj Suryawanshi; Vlastimil Babka; Michal Hocko;
aneesh.ku...@linux.ibm.com
Cc: linux-kernel@vger.kernel.org; minc...@kernel.org; linux...@kvack.org;
khand...@linux.vnet.ibm.com
Subject: Re: [External]
Ping...
Best Regards!
Anson Huang
> -Original Message-
> From: Anson Huang
> Sent: 2019年2月28日 16:56
> To: mturque...@baylibre.com; sb...@kernel.org; shawn...@kernel.org;
> s.ha...@pengutronix.de; ker...@pengutronix.de; feste...@gmail.com;
> robh...@kernel.org; mark.rutl...@arm.com; Aishen
Fix code comment for cpumask_test_and_clear_cpu().
Signed-off-by: Yu Chen
---
include/linux/cpumask.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 147bdec..73ca70d 100644
--- a/include/linux/cpumask.h
+++ b/include/li
From: YueHaibing
This patch series fixes two issue:
1. fix pass-zero-to-ERR_PTR warning
2. return correct errcode to upstream callers
YueHaibing (2):
perf cs-etm: Remove errnoeous ERR_PTR() usage in in
cs_etm__process_auxtrace_info
perf cs-etm: return errcode in cs_etm__process_auxtrace_
From: YueHaibing
intlist__findnew() doesn't uses ERR_PTR() as a return mechanism so its callers
shouldn't try to extract the error using PTR_ERR(ret-from-intlist__findnew()),
make cs_etm__process_auxtrace_info9) return -ENOMEM instead.
Fixes: cd8bfd8c973e ("perf tools: Add processing of coresigh
From: YueHaibing
Make sure 'err' is set in every err path, and returned it to
callers intead of -EINVAL.
Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
Signed-off-by: YueHaibing
---
tools/perf/util/cs-etm.c | 10 +++---
1 file changed, 7 insertions(+), 3 deletions
On 3/20/19 2:28 AM, Greg KH wrote:
> On Wed, Mar 20, 2019 at 02:14:09AM -0400, Jon Masters wrote:
>> On 3/20/19 1:06 AM, Greg KH wrote:
>>> On Tue, Mar 19, 2019 at 11:46:09PM -0400, Jon Masters wrote:
On 2/13/19 2:52 PM, Greg KH wrote:
> On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levi
On Wed, Mar 20, 2019 at 02:14:09AM -0400, Jon Masters wrote:
> On 3/20/19 1:06 AM, Greg KH wrote:
> > On Tue, Mar 19, 2019 at 11:46:09PM -0400, Jon Masters wrote:
> >> On 2/13/19 2:52 PM, Greg KH wrote:
> >>> On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levin wrote:
> >>
> So really, it sou
On 3/20/19 1:06 AM, Greg KH wrote:
> On Tue, Mar 19, 2019 at 11:46:09PM -0400, Jon Masters wrote:
>> On 2/13/19 2:52 PM, Greg KH wrote:
>>> On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levin wrote:
>>
So really, it sounds like a low hanging fruit: we don't really need to
write much mor
On Wed, Mar 20, 2019 at 9:10 AM David Rientjes wrote:
>
> On Thu, 14 Mar 2019, Zhaoyang Huang wrote:
>
> > From: Zhaoyang Huang
> >
> > Two action for this patch:
> > 1. set a batch size for system heap's shrinker, which can have it buffer
> > reasonable page blocks in pool for future allocation.
Hello,
On Tue, Mar 19, 2019 at 09:11:04AM +0200, Mike Rapoport wrote:
> Hi Peter,
>
> On Tue, Mar 19, 2019 at 11:07:22AM +0800, Peter Xu wrote:
> > Add a global sysctl knob "vm.unprivileged_userfaultfd" to control
> > whether userfaultfd is allowed by unprivileged users. When this is
> > set to
On Wed, Mar 6, 2019 at 9:45 PM Souptick Joarder wrote:
>
> From: Sabyasachi Gupta
>
> Remove duplicate header which are included twice.
>
> Signed-off-by: Sabyasachi Gupta
> Signed-off-by: Souptick Joarder
> ---
> v2: Corrected format.
Any comment on this patch ?
>
> tools/testing/selftests/
On Wed, Mar 6, 2019 at 9:48 PM Souptick Joarder wrote:
>
> From: Sabyasachi Gupta
>
> Remove duplicate header which is included twice.
>
> Signed-off-by: Sabyasachi Gupta
> Signed-off-by: Souptick Joarder
> ---
> v2: Corrected format.
Any comment on this patch ?
>
> tools/testing/selftests/t
On Wed, Mar 20, 2019 at 12:06 AM Yang Shi wrote:
>
> When MPOL_MF_STRICT was specified and an existing page was already
> on a node that does not follow the policy, mbind() should return -EIO.
> But commit 6f4576e3687b ("mempolicy: apply page table walker on
> queue_pages_range()") broke the rule.
From: Shiraz Hashim
Existing nvmem framework export full register space
as nvmem binary, but not exporting child node of nvmem
which is nvmem cell. Kernel can read the specific cell
by using nvmem_cell_read but userspace don't have such
provision.
Add framework to export nvmem cell as well, So
u
On Mon, Mar 04, 2019 at 12:55:30AM +0800, Yifeng Li wrote:
> Hello.
>
> >From January to February, there have been two trivial sm750fb patches
> submitted to linux-fbdev, one by me, one by Jin Chen, but both without
> any response. Further, it seems both maintainers, Sudip Mukherjee and
> Teddy Wa
On 19/03/19 9:13 PM, Lorenzo Pieralisi wrote:
> On Fri, Nov 16, 2018 at 12:01:13PM +, Lorenzo Pieralisi wrote:
>> On Thu, Oct 04, 2018 at 12:11:44PM +0100, Lorenzo Pieralisi wrote:
>>> On Thu, Sep 20, 2018 at 05:02:53PM +0200, Jean-Jacques Hiblot wrote:
This makes it easier to use pcite
From: Alastair D'Silva
Most OpenCAPI operations require a valid context, so
exposing these functions to external drivers is necessary.
Signed-off-by: Alastair D'Silva
Reviewed-by: Greg Kurz
---
drivers/misc/ocxl/context.c | 9 +--
drivers/misc/ocxl/file.c | 2 +-
drivers/
From: Alastair D'Silva
External drivers that communicate via OpenCAPI will need to make
MMIO calls to interact with the devices.
Signed-off-by: Alastair D'Silva
Reviewed-by: Greg Kurz
---
drivers/misc/ocxl/Makefile | 2 +-
drivers/misc/ocxl/mmio.c | 234 +++
On Tue, Mar 19, 2019 at 11:46:09PM -0400, Jon Masters wrote:
> On 2/13/19 2:52 PM, Greg KH wrote:
> > On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levin wrote:
>
> >> So really, it sounds like a low hanging fruit: we don't really need to
> >> write much more testing code code nor do we have to
Select CONFIG_PWM_IMX_TPM by default to support i.MX7ULP
TPM PWM.
Signed-off-by: Anson Huang
---
No changes.
---
arch/arm/configs/imx_v6_v7_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/configs/imx_v6_v7_defconfig
b/arch/arm/configs/imx_v6_v7_defconfig
index 5586a50..57
i.MX7ULP has TPM(Low Power Timer/Pulse Width Modulation Module)
inside, it can support multiple PWM channels, all the channels
share same counter and period setting, but each channel can
configure its duty and polarity independently.
There are several TPM modules in i.MX7ULP, the number of channel
This patch adds i.MX7ULP EVK board MIPI-DSI backlight support.
Signed-off-by: Anson Huang
---
No changes.
---
arch/arm/boot/dts/imx7ulp-evk.dts | 21 +
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/dts/imx7ulp-evk.dts
b/arch/arm/boot/dts/imx7ulp-evk.dts
index
Add i.MX7ULP EVK board PWM0 support.
Signed-off-by: Anson Huang
---
No changes.
---
arch/arm/boot/dts/imx7ulp.dtsi | 10 ++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/boot/dts/imx7ulp.dtsi b/arch/arm/boot/dts/imx7ulp.dtsi
index eb349fd..15d04fb 100644
--- a/arch/arm/boot/dts
Add i.MX TPM(Low Power Timer/Pulse Width Modulation Module) PWM binding.
Signed-off-by: Anson Huang
---
No changes.
---
.../devicetree/bindings/pwm/imx-tpm-pwm.txt| 22 ++
1 file changed, 22 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/imx-t
i.MX7ULP EVK board has MIPI-DSI display, its backlight is supplied by
TPM PWM module, this patch set enables i.MX7ULP TPM PWM driver support
and also add backlight support for MIPI-DSI display.
Changes since V6:
- ONLY change the pwm driver patch.
Anson Huang (5):
dt-bindings: pwm: Add
Hi Gaël,
On 19. 3. 20. 오전 3:13, Gaël PORTAY wrote:
> From: Lin Huang
>
> Enable the DMC (Dynamic Memory Controller) and the DFI (DDR PHY Interface)
> nodes on gru/kevin boards so we can support DDR DVFS.
>
> Signed-off-by: Lin Huang
> Signed-off-by: Enric Balletbo i Serra
> Signed-off-by: Gaë
Takashi Iwai 於 2019年3月15日 週五 下午7:24寫道：
>
> On Fri, 15 Mar 2019 10:51:09 +0100,
> Jian-Hong Pan wrote:
> >
> > Some Acer AIO desktops like Veriton Z6860G, Z4860G and Z4660G cannot
> > record sound from headset MIC. This patch adds the
> > ALC286_FIXUP_ACER_AIO_HEADSET_MIC quirk to fix this issue.
Replace (flags & DQUOT_SPACE_RESERVE) with
variable reserve.
Signed-off-by: Chengguang Xu
---
fs/quota/dquot.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index fc20e06c56ba..00de508f9d2e 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota
> From: Peng Fan
>
> > > > > Follow other i.MX6/7 machince code to check return value of
> > > > > imx_soc_device_init and warn when fail.
> > > > >
> > > > > Also drop of_platform_default_populate, because
> > > > > "arch_initcall_sync(of_platform_default_populate_init);" could
> > > > > be used t
Currently we call these notifiers once for each CPU of the policy->cpus
cpumask. It would be more optimal if the notifier can be called only
once and all the relevant information be provided to it. Out of the 23
drivers that register for the transition notifiers today, only 4 of them
do per-cpu upd
On Tue, Mar 19, 2019 at 06:43:45PM -0700, John Hubbard wrote:
> On 3/19/19 5:08 PM, Jerome Glisse wrote:
> > On Wed, Mar 20, 2019 at 10:57:52AM +1100, Dave Chinner wrote:
> >> On Tue, Mar 19, 2019 at 06:06:55PM -0400, Jerome Glisse wrote:
> >>> On Wed, Mar 20, 2019 at 08:23:46AM +1100, Dave Chinner
On 2/27/2019 7:01 PM, Dmitry Osipenko wrote:
27.02.2019 11:20, Sameer Pujar пишет:
Currently runtime PM is enabled for Tegra HDA driver. One of the concern
raised was about handling !PM case in HDA driver. In this case, there is
a need to manage clocks and power explicitly in the driver and re
syzbot has bisected this bug to:
commit 65766ee0bf7fe8b3be80e2e1c3ef54ad59b29476
Author: Takashi Iwai
Date: Fri Nov 9 10:59:45 2018 +
ALSA: oss: Use kvzalloc() for local buffer allocations
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11c3005d20
start commit: 657
On 2/13/19 2:52 PM, Greg KH wrote:
> On Wed, Feb 13, 2019 at 02:25:12PM -0500, Sasha Levin wrote:
>> So really, it sounds like a low hanging fruit: we don't really need to
>> write much more testing code code nor do we have to refactor existing
>> test suites. We just need to make sure the right t
On Tue, Mar 19, 2019 at 07:42:52PM -0700, Daniel Colascione wrote:
> On Tue, Mar 19, 2019 at 6:52 PM Joel Fernandes wrote:
> >
> > On Wed, Mar 20, 2019 at 12:10:23AM +0100, Christian Brauner wrote:
> > > On Tue, Mar 19, 2019 at 03:48:32PM -0700, Daniel Colascione wrote:
> > > > On Tue, Mar 19, 201
On Wed, 20 Mar 2019 11:15:10 +0800
He Zhe wrote:
> Hi,
>
> User stack tracer causes crash and hang since the following commit till
> now(5.1-rc1).
>
> c3bc8fd637a9 ("tracing: Centralize preemptirq tracepoints and unify their
> usage")
Can you send me your .config.
-- Steve
>
> echo 1 > /p
Hi Tom,
I ran the latest kernel (5.1-rc1) with full KASAN enabled, and ran the
ftrace tests, and hit the following:
==
BUG: KASAN: use-after-free in destroy_hist_field+0x30/0x70
Read of size 8 at addr 888086df2210 by task bash/16
Previously, threads blocked on offlining CPUS are migrated to root
rcu_node, so there is a need to initiate RCU priority boosting on root
rcu_node,
Current RCU does not migrate blocked tasks even if all corresponding CPUs
offline.
commit d19fb8d1f3f6 ("rcu: Don't migrate blocked tasks even if all
Hi Martin,
Thanks for your time.
On 2019/3/20 4:27, Martin Blumenstingl wrote:
Hello Liang,
On Sat, Mar 16, 2019 at 11:55 AM Martin Blumenstingl
wrote:
[...]
Martin, Now i am not sure whether NFC driver leads to kernel panic when
calling kmem_cache_alloc_trace.
thank you for confirming that
Hi,
User stack tracer causes crash and hang since the following commit till
now(5.1-rc1).
c3bc8fd637a9 ("tracing: Centralize preemptirq tracepoints and unify their
usage")
echo 1 > /proc/sys/kernel/stack_tracer_enabled
echo userstacktrace > /sys/kernel/debug/tracing/trace_options
echo 1 > /sys
The following error was thrown when compiling `tools/perf` using OpenCSD
v0.11.1. This patch fixes said error.
```
CC util/intel-pt-decoder/intel-pt-log.o
CC util/cs-etm-decoder/cs-etm-decoder.o
util/cs-etm-decoder/cs-etm-decoder.c: In function
‘cs_etm_decoder__buffer_range’:
util/
Hi all,
Changes since 20190319:
The amdgpu tree still had its build failure for which I reverted a commit.
The selinux tree lost its build failure.
The scsi tree gained a build failure for which I applied a patch.
Non-merge commits (relative to Linus' tree): 1993
1658 files changed,
On Tue, 03/19 16:41, Maxim Levitsky wrote:
> When enteriing low power state, the nvme
Typo: "entering".
> driver will now inform the core with the NVME_CTRL_SUSPENDED state
> which will allow mdev driver to act on this information
[snip]
Fam
On Tue, 19 Mar 2019 10:56:52 PDT (-0700), log...@deltatee.com wrote:
Hey Palmer,
On 2019-01-23 12:56 p.m., Palmer Dabbelt wrote:
@Palmer: if you can just look at taking the second patch, I'll resubmit
the first one to the appropriate list.
Works for me. I'll queue the second patch into my st
On Tue, Mar 19, 2019 at 6:52 PM Joel Fernandes wrote:
>
> On Wed, Mar 20, 2019 at 12:10:23AM +0100, Christian Brauner wrote:
> > On Tue, Mar 19, 2019 at 03:48:32PM -0700, Daniel Colascione wrote:
> > > On Tue, Mar 19, 2019 at 3:14 PM Christian Brauner
> > > wrote:
> > > > So I dislike the idea o
On 3/18/19 8:41 AM, Julien Desfossez wrote:
The case where we try to acquire the lock on 2 runqueues belonging to 2
different cores requires the rq_lockp wrapper as well otherwise we
frequently deadlock in there.
This fixes the crash reported in
1552577311-8218-1-git-send-email-jdesfos...@digi
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master
head: babf09c3837f3cf4b58225225609445419c338e6
commit: c97617a81a7616d49bc3700959e08c6c6f447093 ALSA: hda/ca0132 - Fix build
error without CONFIG_PCI
date: 6 weeks ago
config: sh-allmodconfig (attached as .confi
On Tue, 2019-03-19 at 22:31 +0800, Jeff Xie wrote:
> It is unnecessary to call spin_lock_bh in a tasklet.
>
> Signed-off-by: Jeff Xie
>
> ---
> drivers/net/wireless/realtek/rtlwifi/pci.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/wireless/realtek
Thanks for review.
On Wed, 20 Mar 2019 at 00:54, Bart Van Assche wrote:
>
> This is the most important change in this patch. Using the title "Remove
> __cq_empty()"
> for this patch is misleading because the above patch does something else,
> namely changing
> the return type of __cq_dequeue()
Only declare _UFFDIO_WRITEPROTECT if the user specified
UFFDIO_REGISTER_MODE_WP and if all the checks passed. Then when the
user registers regions with shmem/hugetlbfs we won't expose the new
ioctl to them. Even with complete anonymous memory range, we'll only
expose the new WP ioctl bit if the r
This patch adds uffd tests for write protection.
Instead of introducing new tests for it, let's simply squashing uffd-wp
tests into existing uffd-missing test cases. Changes are:
(1) Bouncing tests
We do the write-protection in two ways during the bouncing test:
- By using UFFDIO_COPY_MODE
Introduce uffd_stats structure for statistics of the self test, at the
same time refactor the code to always pass in the uffd_stats for either
read() or poll() typed fault handling threads instead of using two
different ways to return the statistic results. No functional change.
With the new stru
It does not make sense to try to wake up any waiting thread when we're
write-protecting a memory region. Only wake up when resolving a write
protected page fault.
Reviewed-by: Mike Rapoport
Signed-off-by: Peter Xu
---
fs/userfaultfd.c | 13 -
1 file changed, 8 insertions(+), 5 dele
From: Shaohua Li
Now it's safe to enable write protection in userfaultfd API
Cc: Andrea Arcangeli
Cc: Pavel Emelyanov
Cc: Rik van Riel
Cc: Kirill A. Shutemov
Cc: Mel Gorman
Cc: Hugh Dickins
Cc: Johannes Weiner
Signed-off-by: Shaohua Li
Signed-off-by: Andrea Arcangeli
Reviewed-by: Jerome
From: Martin Cracauer
Adds documentation about the write protection support.
Signed-off-by: Martin Cracauer
Signed-off-by: Andrea Arcangeli
[peterx: rewrite in rst format; fixups here and there]
Reviewed-by: Jerome Glisse
Signed-off-by: Peter Xu
---
Documentation/admin-guide/mm/userfaultfd.
In change_pte_range() we do nothing for uffd if the PTE is a swap
entry. That can lead to data mismatch if the page that we are going
to write protect is swapped out when sending the UFFDIO_WRITEPROTECT.
This patch applies/removes the uffd-wp bit even for the swap entries.
Signed-off-by: Peter Xu
From: Shaohua Li
Add API to enable/disable writeprotect a vma range. Unlike mprotect,
this doesn't split/merge vmas.
Cc: Andrea Arcangeli
Cc: Rik van Riel
Cc: Kirill A. Shutemov
Cc: Mel Gorman
Cc: Hugh Dickins
Cc: Johannes Weiner
Signed-off-by: Shaohua Li
Signed-off-by: Andrea Arcangeli
From: Andrea Arcangeli
v1: From: Shaohua Li
v2: cleanups, remove a branch.
[peterx writes up the commit message, as below...]
This patch introduces the new uffd-wp APIs for userspace.
Firstly, we'll allow to do UFFDIO_REGISTER with write protection
tracking using the new UFFDIO_REGISTER_MODE
We've have multiple (and more coming) places that would like to find a
userfault enabled VMA from a mm struct that covers a specific memory
range. This patch introduce the helper for it, meanwhile apply it to
the code.
Suggested-by: Mike Rapoport
Reviewed-by: Jerome Glisse
Reviewed-by: Mike Rap
Adding these missing helpers for uffd-wp operations with pmd
swap/migration entries.
Reviewed-by: Jerome Glisse
Reviewed-by: Mike Rapoport
Signed-off-by: Peter Xu
---
arch/x86/include/asm/pgtable.h | 15 +++
include/asm-generic/pgtable_uffd.h | 15 +++
2 files chang
Export this function for usages outside page fault handlers.
Reviewed-by: Jerome Glisse
Signed-off-by: Peter Xu
---
include/linux/mm.h | 2 ++
mm/memory.c| 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b39efe5ca7f6..00b
UFFD_EVENT_FORK support for uffd-wp should be already there, except
that we should clean the uffd-wp bit if uffd fork event is not
enabled. Detect that to avoid _PAGE_UFFD_WP being set even if the VMA
is not being tracked by VM_UFFD_WP. Do this for both small PTEs and
huge PMDs.
Reviewed-by: Jer
For either swap and page migration, we all use the bit 2 of the entry to
identify whether this entry is uffd write-protected. It plays a similar
role as the existing soft dirty bit in swap entries but only for keeping
the uffd-wp tracking for a specific PTE/PMD.
Something special here is that whe
This allows uffd-wp to support write-protected pages for COW.
For example, the uffd write-protected PTE could also be write-protected
by other usages like COW or zero pages. When that happens, we can't
simply set the write bit in the PTE since otherwise it'll change the
content of every single re
Don't collapse the huge PMD if there is any userfault write protected
small PTEs. The problem is that the write protection is in small page
granularity and there's no way to keep all these write protection
information if the small pages are going to be merged into a huge PMD.
The same thing needs
Firstly, introduce two new flags MM_CP_UFFD_WP[_RESOLVE] for
change_protection() when used with uffd-wp and make sure the two new
flags are exclusively used. Then,
- For MM_CP_UFFD_WP: apply the _PAGE_UFFD_WP bit and remove _PAGE_RW
when a range of memory is write protected by uffd
- For
From: Andrea Arcangeli
This allows UFFDIO_COPY to map pages write-protected.
Signed-off-by: Andrea Arcangeli
[peterx: switch to VM_WARN_ON_ONCE in mfill_atomic_pte; add brackets
around "dst_vma->vm_flags & VM_WRITE"; fix wordings in comments and
commit messages]
Reviewed-by: Jerome Glisse
Re
From: Andrea Arcangeli
There are several cases write protection fault happens. It could be a
write to zero page, swaped page or userfault write protected
page. When the fault happens, there is no way to know if userfault
write protect the page before. Here we just blindly issue a userfault
notifi
From: Shaohua Li
add helper for writeprotect check. Will use it later.
Cc: Andrea Arcangeli
Cc: Pavel Emelyanov
Cc: Rik van Riel
Cc: Kirill A. Shutemov
Cc: Mel Gorman
Cc: Hugh Dickins
Cc: Johannes Weiner
Signed-off-by: Shaohua Li
Signed-off-by: Andrea Arcangeli
Reviewed-by: Jerome Gliss
From: Andrea Arcangeli
Implement helpers methods to invoke userfaultfd wp faults more
selectively: not only when a wp fault triggers on a vma with
vma->vm_flags VM_UFFD_WP set, but only if the _PAGE_UFFD_WP bit is set
in the pagetable too.
Signed-off-by: Andrea Arcangeli
Reviewed-by: Jerome Gli
change_protection() was used by either the NUMA or mprotect() code,
there's one parameter for each of the callers (dirty_accountable and
prot_numa). Further, these parameters are passed along the calls:
- change_protection_range()
- change_p4d_range()
- change_pud_range()
- change_pmd_ran
From: Andrea Arcangeli
Accurate userfaultfd WP tracking is possible by tracking exactly which
virtual memory ranges were writeprotected by userland. We can't relay
only on the RW bit of the mapped pagetable because that information is
destroyed by fork() or KSM or swap. If we were to relay on tha
This is the gup counterpart of the change that allows the VM_FAULT_RETRY
to happen for more than once.
Reviewed-by: Jerome Glisse
Signed-off-by: Peter Xu
---
mm/gup.c | 17 +
mm/hugetlb.c | 6 --
2 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/mm/gup.c b
The idea comes from the upstream discussion between Linus and Andrea:
https://lkml.org/lkml/2017/10/30/560
A summary to the issue: there was a special path in handle_userfault()
in the past that we'll return a VM_FAULT_NOPAGE when we detected
non-fatal signals when waiting for userfault handling.
This series implements initial write protection support for
userfaultfd. Currently both shmem and hugetlbfs are not supported
yet, but only anonymous memory. This is the 3nd version of it.
The latest code can also be found at:
https://github.com/xzpeter/linux/tree/uffd-wp-merged
Note again t
The idea comes from a discussion between Linus and Andrea [1].
Before this patch we only allow a page fault to retry once. We
achieved this by clearing the FAULT_FLAG_ALLOW_RETRY flag when doing
handle_mm_fault() the second time. This was majorly used to avoid
unexpected starvation of the system
The idea comes from the upstream discussion between Linus and Andrea:
https://lkml.org/lkml/2017/10/30/560
A summary to the issue: there was a special path in handle_userfault()
in the past that we'll return a VM_FAULT_NOPAGE when we detected
non-fatal signals when waiting for userfault handlin
There's plenty of places around __get_user_pages() that has a parameter
"nonblocking" which does not really mean that "it won't block" (because
it can really block) but instead it shows whether the mmap_sem is
released by up_read() during the page fault handling mostly when
VM_FAULT_RETRY is return
On Tue, Mar 19, 2019 at 04:26:54PM -0400, Vivek Goyal wrote:
> On Sun, Mar 17, 2019 at 08:35:21AM +0800, Liu Bo wrote:
> > While doing memremap from pci_dev's system bus address to kernel virtual
> > address, we assign a wrong value to the %end of pgmap.res, which ends up
> > with a wrong resource
Thanks for the review.
On Wed, 20 Mar 2019 at 00:29, Bart Van Assche wrote:
>
> On Mon, 2019-03-18 at 16:57 +0800, Yuyang Du wrote:
> > - if (ret < 0) {
> > + if (unlikely(ret < 0)) {
> > print_bfs_bug(ret);
> > return 0;
> > }
> > - if (r
On (03/20/19 08:19), Minchan Kim wrote:
> Cc: [5.0]
> Reported-by: Makoto Wu
> Signed-off-by: Minchan Kim
Reviewed-by: Sergey Senozhatsky
> +++ b/drivers/block/zram/zram_drv.c
> @@ -290,18 +290,8 @@ static ssize_t idle_store(struct device *dev,
> struct zram *zram = dev_to_zram(dev);
>
On Wed, Mar 20, 2019 at 12:10:23AM +0100, Christian Brauner wrote:
> On Tue, Mar 19, 2019 at 03:48:32PM -0700, Daniel Colascione wrote:
> > On Tue, Mar 19, 2019 at 3:14 PM Christian Brauner
> > wrote:
> > > So I dislike the idea of allocating new inodes from the procfs super
> > > block. I would
thanks, without the patch we can reproduce with the way in 10 hours
Suspend/Resume test, with the test, we can't reproduce for 30 hours.
-Original Message-
From: Jiri Kosina
Sent: Tuesday, March 19, 2019 10:42 PM
To: He, Bo
Cc: benjamin.tissoi...@redhat.com; linux-in...@vger.kernel.org
On Wed, Mar 20, 2019 at 08:35:17AM +0800, Jin, Yao wrote:
> Nobody like this patch? :)
>
> In my test, for a 72MB perf.data (with LBR data), the perf annotate
> processing speed:
>
> Before: 10.2s
> After: 2.2s
That's great!
-Andi
On 3/19/19 5:08 PM, Jerome Glisse wrote:
> On Wed, Mar 20, 2019 at 10:57:52AM +1100, Dave Chinner wrote:
>> On Tue, Mar 19, 2019 at 06:06:55PM -0400, Jerome Glisse wrote:
>>> On Wed, Mar 20, 2019 at 08:23:46AM +1100, Dave Chinner wrote:
On Tue, Mar 19, 2019 at 10:14:16AM -0400, Jerome Glisse w
On 3/19/19 4:58 PM, Damien Le Moal wrote:
On 2019/03/20 8:56, Damien Le Moal wrote:
On 2019/03/20 7:20, Atish Patra wrote:
If nr_cpus command line option is set, maximum possible cpu should be
set to that value.
Signed-off-by: Atish Patra
---
arch/riscv/kernel/smpboot.c | 10 +-
1
Assalamu Alaikum Wa Rahmatullahi Wa Barakatuh,
hello dear
I came across your contact during my private search. Mrs Aisha Al-
Qaddafi is my name, the only daughter of late Libyan president, am a
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Currently, there are no topology defined for RISC-V.
Parse the cpu-map node from device tree and setup the
cpu topology.
CPU topology after applying the patch.
$cat /sys/devices/system/cpu/cpu2/topology/core_siblings_list
0-3
$cat /sys/devices/system/cpu/cpu3/topology/core_siblings_list
0-3
$cat /
Both RISC-V & ARM64 are using cpu-map device tree to describe
their cpu topology. It's better to move the relevant code to
a common place instead of duplicate code.
Signed-off-by: Atish Patra
Tested-by: Jeffrey Hugo
---
arch/arm64/include/asm/topology.h | 23 ---
arch/arm64/kernel/topology.c
cpu-map binding can be used to described cpu topology for both
RISC-V & ARM. It makes more sense to move the binding to document
to a common place.
The relevant discussion can be found here.
https://lkml.org/lkml/2018/11/6/19
Signed-off-by: Atish Patra
Reviewed-by: Sudeep Holla
---
.../topolog
On Wed, Mar 13, 2019 at 12:19:31PM +0800, Pingfan Liu wrote:
Hi Pingfan,
I wonder your test method and test case.
Do you test it in the Qemu guest or real machine.
Thanks,
Chao Fan
>crashkernel=x@y option may fail to reserve the required memory region if
>KASLR puts kernel into the region. To a
The cpu-map DT entry in ARM can describe the CPU topology in much better
way compared to other existing approaches. RISC-V can easily adopt this
binding to represent its own CPU topology. Thus, both cpu-map DT
binding and topology parsing code can be moved to a common location so
that RISC-V or any
Currently, ARM32 and ARM64 uses different data structures to
represent their cpu toplogies. Since, we are moving the ARM64
topology to common code to be used by other architectures, we
can reuse that for ARM32 as well.
Signed-off-by: Atish Patra
---
arch/arm/include/asm/topology.h | 22 +
On 3/19/19 6:09 PM, Christopher Lameter wrote:
> On Tue, 19 Mar 2019, John Hubbard wrote:
>
>>>
>>> My concerns do not affect this patchset which just marks the get/put for
>>> the pagecache. The problem was that the description was making claims that
>>> were a bit misleading and seemed to prescr
On Tue, Mar 19, 2019 at 11:37:18PM +0100, Janusz Krzysztofik wrote:
> After recent modifications, only a hardcoded partition info makes
> the driver device specific. Other than that, the driver uses GPIO
> exclusively and can be used on any hardware.
>
> Drop the partition info and use MTD partit
On Thu, 14 Mar 2019, Liu Xiang wrote:
> When CONFIG_SLUB_DEBUG is not enabled, remove_full() is empty.
> While CONFIG_SLUB_DEBUG is enabled, remove_full() can check
> s->flags by itself. So kmem_cache_debug() is useless and
> can be removed.
>
> Signed-off-by: Liu Xiang
Acked-by: David Rientjes
On Thu, 14 Mar 2019, Zhaoyang Huang wrote:
> From: Zhaoyang Huang
>
> Two action for this patch:
> 1. set a batch size for system heap's shrinker, which can have it buffer
> reasonable page blocks in pool for future allocation.
> 2. reverse the order sequence when free page blocks, the purpose i
On Tue, 19 Mar 2019, John Hubbard wrote:
> >
> > My concerns do not affect this patchset which just marks the get/put for
> > the pagecache. The problem was that the description was making claims that
> > were a bit misleading and seemed to prescribe a solution.
> >
> > So lets get this merged. Wh
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