On Thu, Nov 15, 2018 at 04:54:55PM +0200, Leon Romanovsky wrote:
> Date: Thu, 15 Nov 2018 16:54:55 +0200
> From: Leon Romanovsky
> To: Kenneth Lee
> CC: Kenneth Lee , Tim Sell ,
> linux-doc@vger.kernel.org, Alexander Shishkin
> , Zaibo Xu ,
> zhangfei@foxmail.com, linux...@huawei.com, haoj
On Mon, Nov 19, 2018 at 05:14:05PM +0800, Kenneth Lee wrote:
> Date: Mon, 19 Nov 2018 17:14:05 +0800
> From: Kenneth Lee
> To: Leon Romanovsky
> CC: Tim Sell , linux-doc@vger.kernel.org,
> Alexander Shishkin , Zaibo Xu
> , zhangfei@foxmail.com, linux...@huawei.com,
> haojian.zhu...@linaro.
2018-11-15 17:30 GMT+01:00, Jens Axboe :
> On 11/15/18 4:54 AM, Angelo Ruocco wrote:
>> Hi Jens,
>>
>> I have rebased the patchset against the for-4.21/block branch, but I
>> can't test them properly because the compiling process has an error on
>> a different file. In particular:
>>
>> include/net
On Mon, Nov 19, 2018 at 08:41:31AM +0300, Alexey Budankov wrote:
>
> Extend index.rst index file at admin-guide root directory with
> the reference to perf-security.rst file being introduced.
>
> Signed-off-by: Alexey Budankov
> ---
> Documentation/admin-guide/index.rst | 1 +
> 1 file changed
Mark inflated and never onlined pages PG_offline, to tell the world that
the content is stale and should not be dumped.
Cc: Xavier Deguillard
Cc: Nadav Amit
Cc: Arnd Bergmann
Cc: Greg Kroah-Hartman
Cc: Julien Freche
Cc: Andrew Morton
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: "Michael S. Tsir
PG_balloon was introduced to implement page migration/compaction for pages
inflated in virtio-balloon. Nowadays, it is only a marker that a page is
part of virtio-balloon and therefore logically offline.
We also want to make use of this flag in other balloon drivers - for
inflated pages or when on
Right now, pages inflated as part of a balloon driver will be dumped
by dump tools like makedumpfile. While XEN is able to check in the
crash kernel whether a certain pfn is actuall backed by memory in the
hypervisor (see xen_oldmem_pfn_is_ram) and optimize this case, dumps of
other balloon inflate
Commit b1123ea6d3b3 ("mm: balloon: use general non-lru movable page
feature") reworked balloon handling to make use of the general
non-lru movable page feature. The big comment block in
balloon_compaction.h contains quite some outdated information. Let's fix
this.
Cc: Andrew Morton
Cc: Matthew Wi
The content of pages that are marked PG_offline is not of interest
(e.g. inflated by a balloon driver), let's skip these pages.
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Cc: Len Brown
Cc: Andrew Morton
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: "Michael S. Tsirkin"
Acked-by: Pavel Machek
Signe
Mark inflated and never onlined pages PG_offline, to tell the world that
the content is stale and should not be dumped.
Cc: "K. Y. Srinivasan"
Cc: Haiyang Zhang
Cc: Stephen Hemminger
Cc: Kairui Song
Cc: Vitaly Kuznetsov
Cc: Andrew Morton
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: "Michael S.
Let's use pfn_to_online_page() instead of pfn_to_page() when checking
for saveable pages to not save/restore offline memory sections.
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Cc: Len Brown
Cc: Andrew Morton
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: "Michael S. Tsirkin"
Suggested-by: Michal Ho
Mark inflated and never onlined pages PG_offline, to tell the world that
the content is stale and should not be dumped.
Cc: Boris Ostrovsky
Cc: Juergen Gross
Cc: Stefano Stabellini
Cc: Andrew Morton
Cc: Matthew Wilcox
Cc: Michal Hocko
Cc: "Michael S. Tsirkin"
Signed-off-by: David Hildenbran
Linux marks pages that are logically offline via a page flag (map count).
Such pages e.g. include pages infated as part of a balloon driver or
pages that were not actually onlined when onlining the whole section.
While the hypervisor usually allows to read such inflated memory, we
basically read a
On Mon, Nov 19, 2018 at 08:42:52AM +0300, Alexey Budankov wrote:
>
> Implement initial version of perf-security.rst documentation file
> initially covering security concerns related to PCL/Perf performance
> monitoring in multiuser environments.
Ditch the PCL thing. That's not a term used anywh
From: Angelo Ruocco
When two or more entities (of any kind) share a file, their respective
cftypes are linked together. The allowed operations on those files
are: open, release, write and show, mapped to the functions defined in
the cftypes.
This commit makes the cgroup core invoke, whenever one
Some of the files exposed in a cgroup by bfq, for the proportional
share policy, have the same meaning as the files owned by cfq (before
legacy blk was removed).
The old implementation of the cgroup interface didn't allow different
entities to create cgroup files with the same name (in the same
su
The current implementation of the seq_show hook in the cftype struct
has only, as parameters, the seq_file to write to and the arguments
passed by the command line. Thus, the only way to retrieve the cftype
that owns an instance of such hook function is by using the accessor
in the seq_file itself.
From: Angelo Ruocco
Some of the cgroup files defined in the throttle policy have the same
meaning as those defined in the proportional share policy.
This commit uses the new file sharing interface in cgroup to share
these files.
Signed-off-by: Angelo Ruocco
Signed-off-by: Paolo Valente
---
b
From: Angelo Ruocco
bfq exposes a cgroup attribute, weight, with the same meaning as that
exposed by cfq.
This commit changes bfq default and min weights to match the ones set
by cfq (before legacy blk was removed).
Signed-off-by: Angelo Ruocco
Signed-off-by: Paolo Valente
---
block/bfq-iosc
This commit fixes a few clerical errors in
Documentation/block/bfq-iosched.txt.
Signed-off-by: Paolo Valente
---
Documentation/block/bfq-iosched.txt | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Documentation/block/bfq-iosched.txt
b/Documentation/block/bfq-iosched.tx
BFQ now shares interface files with CFQ, for the proportional-share
policy. Make documentation consistent with that.
Signed-off-by: Paolo Valente
---
Documentation/block/bfq-iosched.txt | 28 +++-
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/Documentati
From: Angelo Ruocco
Two entities, of any kind, are not able to create a cgroup file with
the same name in the same folder: if an entity tries to create a file
that has the same name as a file created by another entity, the cgroup
core stops it, warns the user about the error, and then proceeds to
From: Angelo Ruocco
The piece of information "who created a certain cftype" is not stored
anywhere, thus a cftype is not able to know who is its owner.
This commit addresses this problem by adding a new field in the cftype
structure that enables the name of its owner to be explicitly set.
Signe
Some seq_show functions need to access the cftype they belong to, for
retrieving the data to show. These functions get their cftype by using
the seq_cft accessor for the seq_file. This solution is no longer
viable in case a seq_file is shared among more than one cftype,
because the accessor always
On Monday, November 19, 2018 6:42 AM, Alexey Budankov
wrote:
> Implement initial version of perf-security.rst documentation file
> initially covering security concerns related to PCL/Perf performance
> monitoring in multiuser environments.
>
> Suggested-by: Thomas Gleixner t...@linutronix.de
> S
Hi,
here is the V2 of this patch series. Let me rephrase the description
of the series, in view of the fact that CFQ will be gone with legacy
block.
The current implementation of cgroups doesn't allow two or more
entities, e.g., I/O schedulers, to share the same files. Thus, to
enable people to s
On Mon, Nov 19, 2018 at 10:35:59AM +, Jordan Glover wrote:
> On Monday, November 19, 2018 6:42 AM, Alexey Budankov
> wrote:
> > +>=3:
> >
> > - Restrict *access* to PCL performance monitoring for unprivileged
> > processes.
> >
> >
> > - This is the default on Debian and Android
On Mon, Nov 19, 2018 at 05:19:10PM +0800, Kenneth Lee wrote:
> On Mon, Nov 19, 2018 at 05:14:05PM +0800, Kenneth Lee wrote:
> > Date: Mon, 19 Nov 2018 17:14:05 +0800
> > From: Kenneth Lee
> > To: Leon Romanovsky
> > CC: Tim Sell , linux-doc@vger.kernel.org,
> > Alexander Shishkin , Zaibo Xu
> >
On Monday, November 19, 2018 11:46 AM, Peter Zijlstra
wrote:
> On Mon, Nov 19, 2018 at 10:35:59AM +, Jordan Glover wrote:
>
> > On Monday, November 19, 2018 6:42 AM, Alexey Budankov
> > alexey.budan...@linux.intel.com wrote:
> >
> > > +>=3:
> > >
> > > - Restrict *access* to PCL per
On Mon 2018-11-05 13:22:05, Daniel Colascione wrote:
> State explicitly that holding a /proc/pid file descriptor open does
> not reserve the PID. Also note that in the event of PID reuse, these
> open file descriptors refer to the old, now-dead process, and not the
> new one that happens to be name
Whilst making an unrelated change to some Documentation, Linus sayeth:
| Afaik, even in Britain, "whilst" is unusual and considered more
| formal, and "while" is the common word.
|
| [...]
|
| Can we just admit that we work with computers, and we don't need to
| use þe eald Englisc s
On 2018-11-07, Daniel Colascione wrote:
> On Wed, Nov 7, 2018 at 4:00 PM, Michal Hocko wrote:
> > On Wed 07-11-18 15:48:20, Daniel Colascione wrote:
> >> On Tue, Nov 6, 2018 at 1:05 PM, Michal Hocko wrote:
> >> > otherwise anybody could simply DoS the system
> >> > by consuming all available pid
On 15.11.2018 23:16, Fernando Ramos wrote:
> This patch unifies the naming of DRM functions for reference counting as
> requested on Documentation/gpu/todo.rst
>
> Signed-off-by: Fernando Ramos
> ---
> drivers/gpu/drm/arc/arcpgu_drv.c | 4 ++--
> drivers/gpu/drm/atmel-hlcdc/atmel_hlc
On Mon, Nov 19, 2018 at 1:16 PM David Hildenbrand wrote:
>
> PG_balloon was introduced to implement page migration/compaction for pages
> inflated in virtio-balloon. Nowadays, it is only a marker that a page is
> part of virtio-balloon and therefore logically offline.
>
> We also want to make use
On Mon 19-11-18 11:16:15, David Hildenbrand wrote:
> Let's use pfn_to_online_page() instead of pfn_to_page() when checking
> for saveable pages to not save/restore offline memory sections.
>
> Cc: "Rafael J. Wysocki"
> Cc: Pavel Machek
> Cc: Len Brown
> Cc: Andrew Morton
> Cc: Matthew Wilcox
On Thu, Nov 15, 2018 at 11:16:23PM +0100, Fernando Ramos wrote:
> This patch unifies the naming of DRM functions for reference counting as
> requested on Documentation/gpu/todo.rst
>
> Signed-off-by: Fernando Ramos
> ---
> drivers/gpu/drm/arc/arcpgu_drv.c | 4 ++--
> drivers/gpu/drm/
On 19/11/2018 11:16, David Hildenbrand wrote:
> Mark inflated and never onlined pages PG_offline, to tell the world that
> the content is stale and should not be dumped.
>
> Cc: Boris Ostrovsky
> Cc: Juergen Gross
> Cc: Stefano Stabellini
> Cc: Andrew Morton
> Cc: Matthew Wilcox
> Cc: Michal
Hi Boris,
On 16/11/18 13:16, Boris Brezillon wrote:
On Fri, 16 Nov 2018 12:31:42 +
vitor wrote:
Hi Boris,
On 15/11/18 19:00, Boris Brezillon wrote:
On Thu, 15 Nov 2018 18:03:47 +
vitor wrote:
Hi Boris,
On 15/11/18 15:28, Boris Brezillon wrote:
On Thu, 15 Nov 2018 16:01:37 +
On Mon, 19 Nov 2018 12:35:42 +
vitor wrote:
> Hi Boris,
>
> On 16/11/18 13:16, Boris Brezillon wrote:
> > On Fri, 16 Nov 2018 12:31:42 +
> > vitor wrote:
> >
> >> Hi Boris,
> >>
> >>
> >> On 15/11/18 19:00, Boris Brezillon wrote:
> >>> On Thu, 15 Nov 2018 18:03:47 +
> >>> vitor
On 19/11/18 12:43, Boris Brezillon wrote:
I know [1], but there might be other subsystems doing the same thing.
[1]https://urldefense.proofpoint.com/v2/url?u=https-3A__elixir.bootlin.com_linux_v4.20-2Drc3_source_drivers_spi_spidev.c&d=DwIFaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=qVuU64u9x77Y0Kd0PhDK_lpxFgg
On 19.11.18 13:22, Juergen Gross wrote:
> On 19/11/2018 11:16, David Hildenbrand wrote:
>> Mark inflated and never onlined pages PG_offline, to tell the world that
>> the content is stale and should not be dumped.
>>
>> Cc: Boris Ostrovsky
>> Cc: Juergen Gross
>> Cc: Stefano Stabellini
>> Cc: An
On Mon 2018-11-19 11:16:15, David Hildenbrand wrote:
> Let's use pfn_to_online_page() instead of pfn_to_page() when checking
> for saveable pages to not save/restore offline memory sections.
>
> Cc: "Rafael J. Wysocki"
Acked-by: Pavel Machek
--
(english) http://www.livejournal.com/~pavelmache
On Sun, Nov 18, 2018 at 05:19:04PM -0800, Matthew Wilcox wrote:
> On Mon, Nov 19, 2018 at 09:08:20AM +0800, kernel test robot wrote:
> > Greetings,
> >
> > 0day kernel testing robot got the below dmesg and the first bad commit is
>
> Umm. I don't see a 'suspicious RCU usage' message in here. I
Hi,
On 19.11.2018 13:33, Peter Zijlstra wrote:
> On Mon, Nov 19, 2018 at 08:42:52AM +0300, Alexey Budankov wrote:
>>
>> Implement initial version of perf-security.rst documentation file
>> initially covering security concerns related to PCL/Perf performance
>> monitoring in multiuser environments
Hello Greg,
On 19.11.2018 13:03, Greg KH wrote:
> On Mon, Nov 19, 2018 at 08:41:31AM +0300, Alexey Budankov wrote:
>>
>> Extend index.rst index file at admin-guide root directory with
>> the reference to perf-security.rst file being introduced.
>>
>> Signed-off-by: Alexey Budankov
>> ---
>> Doc
Hi,
On 19.11.2018 13:49, Jordan Glover wrote:
> On Monday, November 19, 2018 11:46 AM, Peter Zijlstra
> wrote:
>
>> On Mon, Nov 19, 2018 at 10:35:59AM +, Jordan Glover wrote:
>>
>>> On Monday, November 19, 2018 6:42 AM, Alexey Budankov
>>> alexey.budan...@linux.intel.com wrote:
>>>
+>
With tag based KASAN mode the early shadow value is 0xff and not 0x00,
so this patch renames kasan_zero_(page|pte|pmd|pud|p4d) to
kasan_early_shadow_(page|pte|pmd|pud|p4d) to avoid confusion.
Suggested-by: Mark Rutland
Signed-off-by: Andrey Konovalov
---
arch/arm64/mm/kasan_init.c | 43
A tag-based KASAN shadow memory cell contains a memory tag, that
corresponds to the tag in the top byte of the pointer, that points to that
memory. The native top byte value of kernel pointers is 0xff, so with
tag-based KASAN we need to initialize shadow memory to 0xff.
Reviewed-by: Andrey Ryabini
Tag-based KASAN uses 1 shadow byte for 16 bytes of kernel memory, so it
requires 1/16th of the kernel virtual address space for the shadow memory.
This commit sets KASAN_SHADOW_SCALE_SHIFT to 4 when the tag-based KASAN
mode is enabled.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Sig
This commit adds a few helper functions, that are meant to be used to
work with tags embedded in the top byte of kernel pointers: to set, to
get or to reset the top byte.
Signed-off-by: Andrey Konovalov
---
arch/arm64/include/asm/kasan.h | 8 +--
arch/arm64/include/asm/memory.h | 12 ++
While with SLUB we can actually preassign tags for caches with contructors
and store them in pointers in the freelist, SLAB doesn't allow that since
the freelist is stored as an array of indexes, so there are no pointers to
store the tags.
Instead we compute the tag twice, once when a slab is crea
Tag-based KASAN uses the Top Byte Ignore feature of arm64 CPUs to store a
pointer tag in the top byte of each pointer. This commit enables the
TCR_TBI1 bit, which enables Top Byte Ignore for the kernel, when tag-based
KASAN is used.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-
This commit adds tag-based KASAN specific hooks implementation and
adjusts common generic and tag-based KASAN ones.
1. When a new slab cache is created, tag-based KASAN rounds up the size of
the objects in this cache to KASAN_SHADOW_SCALE_SIZE (== 16).
2. On each kmalloc tag-based KASAN genera
Tag-based KASAN doesn't check memory accesses through pointers tagged with
0xff. When page_address is used to get pointer to memory that corresponds
to some page, the tag of the resulting pointer gets set to 0xff, even
though the allocated memory might have been tagged differently.
For slab pages
This patch updates KASAN documentation to reflect the addition of the new
tag-based mode.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
Documentation/dev-tools/kasan.rst | 232 ++
1 file changed, 138 insertions(+), 94 de
This patch adds a "SPDX-License-Identifier: GPL-2.0" mark to all source
files under mm/kasan.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
mm/kasan/common.c | 1 +
mm/kasan/generic.c| 1 +
mm/kasan/generic_report.c | 1 +
mm/kasan/
The krealloc function checks where the same buffer was reused or a new one
allocated by comparing kernel pointers. Tag-based KASAN changes memory tag
on the krealloc'ed chunk of memory and therefore also changes the pointer
tag of the returned pointer. Therefore we need to perform comparison on
unt
This patch moves generic KASAN specific error reporting routines to
generic_report.c without any functional changes, leaving common error
reporting code in report.c to be later reused by tag-based KASAN.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
This patch adds __must_check annotations to kasan hooks that return a
pointer to make sure that a tagged pointer always gets propagated.
Suggested-by: Andrey Ryabinin
Signed-off-by: Andrey Konovalov
---
include/linux/kasan.h | 16 ++--
mm/kasan/common.c | 14 --
2 fi
This commit adds rountines, that print tag-based KASAN error reports.
Those are quite similar to generic KASAN, the difference is:
1. The way tag-based KASAN finds the first bad shadow cell (with a
mismatching tag). Tag-based KASAN compares memory tags from the shadow
memory to the pointer t
Tag-based KASAN inline instrumentation mode (which embeds checks of shadow
memory into the generated code, instead of inserting a callback) generates
a brk instruction when a tag mismatch is detected.
This commit adds a tag-based KASAN specific brk handler, that decodes the
immediate value passed
An object constructor can initialize pointers within this objects based on
the address of the object. Since the object address might be tagged, we
need to assign a tag before calling constructor.
The implemented approach is to assign tags to objects with constructors
when a slab is allocated and c
On Mon, Nov 19, 2018 at 6:26 PM, Andrey Konovalov wrote:
> This patchset adds a new software tag-based mode to KASAN [1].
> (Initially this mode was called KHWASAN, but it got renamed,
> see the naming rationale at the end of this section).
>
> The plan is to implement HWASan [2] for the kernel w
Right now arm64 fault handling code removes pointer tags from addresses
covered by TTBR0 in faults taken from both EL0 and EL1, but doesn't do
that for pointers covered by TTBR1.
This patch adds two helper functions is_ttbr0_addr() and is_ttbr1_addr(),
where the latter one accounts for the fact th
Move the untagged_addr() macro from arch/arm64/include/asm/uaccess.h
to arch/arm64/include/asm/memory.h to be later reused by KASAN.
Also make the untagged_addr() macro accept all kinds of address types
(void *, unsigned long, etc.). This allows not to specify type casts in
each place where the ma
virt_addr_is_linear (which is used by virt_addr_valid) assumes that the
top byte of the address is 0xff, which isn't always the case with
tag-based KASAN.
This patch resets the tag in this macro.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
arch/
This commit splits the current CONFIG_KASAN config option into two:
1. CONFIG_KASAN_GENERIC, that enables the generic KASAN mode (the one
that exists now);
2. CONFIG_KASAN_SW_TAGS, that enables the software tag-based KASAN mode.
The name CONFIG_KASAN_SW_TAGS is chosen as in the future we will h
We now have two KASAN modes: generic KASAN and tag-based KASAN. Rename
kasan.c to generic.c to reflect that. Also rename kasan_init.c to init.c
as it contains initialization code for both KASAN modes.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
m
Tag-based KASAN reuses a significant part of the generic KASAN code, so
move the common parts to common.c without any functional changes.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: Andrey Konovalov
---
mm/kasan/Makefile | 5 +-
mm/kasan/common.c | 603
This patchset adds a new software tag-based mode to KASAN [1].
(Initially this mode was called KHWASAN, but it got renamed,
see the naming rationale at the end of this section).
The plan is to implement HWASan [2] for the kernel with the incentive,
that it's going to have comparable to KASAN perf
Tag-based KASAN changes the value of the top byte of pointers returned
from the kernel allocation functions (such as kmalloc). This patch updates
KASAN hooks signatures and their usage in SLAB and SLUB code to reflect
that.
Reviewed-by: Andrey Ryabinin
Reviewed-by: Dmitry Vyukov
Signed-off-by: A
The previous patch updated KASAN hooks signatures and their usage in SLAB
and SLUB code, except for the early_kmem_cache_node_alloc function. This
patch handles that function separately, as it requires to reorder some of
the initialization code to correctly propagate a tagged pointer in case a
tag
On Mon, Nov 19, 2018 at 06:28:57PM +0100, Andrey Konovalov wrote:
> On Mon, Nov 19, 2018 at 6:26 PM, Andrey Konovalov
> wrote:
> > Changes in v11:
> > - Rebased onto 9ff01193 (4.20-rc3).
> > - Moved KASAN_SHADOW_SCALE_SHIFT definition to arch/arm64/Makefile.
> > - Added and used CC_HAS_KASAN_GENE
On Sun, Nov 11, 2018 at 10:49:39AM -0800, H. Peter Anvin wrote:
> On 11/10/18 1:03 AM, Juergen Gross wrote:
> >
> > How would that help? The garabge data written could have the correct
> > terminal sentinel value by chance.
> >
> > That's why I re-used an existing field in setup_header (the versi
On Mon, Nov 19, 2018 at 12:48:01PM +0200, Leon Romanovsky wrote:
> On Mon, Nov 19, 2018 at 05:19:10PM +0800, Kenneth Lee wrote:
> > On Mon, Nov 19, 2018 at 05:14:05PM +0800, Kenneth Lee wrote:
> > > On Thu, Nov 15, 2018 at 04:54:55PM +0200, Leon Romanovsky wrote:
> > > > On Thu, Nov 15, 2018 at 04:
On Sat, Nov 17, 2018 at 12:02:28AM -0800, Mike Rapoport wrote:
> Hi,
>
> On Fri, Nov 16, 2018 at 04:38:30PM -0800, Roman Gushchin wrote:
> > Describe cgroup v2 freezer interface in the cgroup v2 admin guide.
> >
> > Signed-off-by: Roman Gushchin
> > Cc: Tejun Heo
> > Cc: linux-doc@vger.kernel.o
On Fri, Nov 16, 2018 at 05:51:34PM -0800, Nicolin Chen wrote:
> Hello Guenter,
>
> On Wed, Nov 14, 2018 at 09:23:30AM -0800, Guenter Roeck wrote:
> > > An alternative way (without the sysfs node), after looking at
> > > other hwmon code, could be to have a timed polling thread and
> > > read data
On Mon, Nov 19, 2018 at 11:48:54AM -0500, Jerome Glisse wrote:
> Just to comment on this, any infiniband driver which use umem and do
> not have ODP (here ODP for me means listening to mmu notifier so all
> infiniband driver except mlx5) will be affected by same issue AFAICT.
>
> AFAICT there is
On Mon, Nov 19, 2018 at 11:27:52AM -0700, Jason Gunthorpe wrote:
> On Mon, Nov 19, 2018 at 11:48:54AM -0500, Jerome Glisse wrote:
>
> > Just to comment on this, any infiniband driver which use umem and do
> > not have ODP (here ODP for me means listening to mmu notifier so all
> > infiniband drive
On Mon, Nov 19, 2018 at 05:14:05PM +0800, Kenneth Lee wrote:
> If the hardware cannot share page table with the CPU, we then need to have
> some way to change the device page table. This is what happen in ODP. It
> invalidates the page table in device upon mmu_notifier call back. But this
> cann
On Mon, Nov 19, 2018 at 01:42:16PM -0500, Jerome Glisse wrote:
> On Mon, Nov 19, 2018 at 11:27:52AM -0700, Jason Gunthorpe wrote:
> > On Mon, Nov 19, 2018 at 11:48:54AM -0500, Jerome Glisse wrote:
> >
> > > Just to comment on this, any infiniband driver which use umem and do
> > > not have ODP (he
On Mon, Nov 19, 2018 at 01:42:16PM -0500, Jerome Glisse wrote:
> On Mon, Nov 19, 2018 at 11:27:52AM -0700, Jason Gunthorpe wrote:
> > On Mon, Nov 19, 2018 at 11:48:54AM -0500, Jerome Glisse wrote:
> >
> > > Just to comment on this, any infiniband driver which use umem and do
> > > not have ODP (her
On Sun, 18 Nov 2018, Borislav Petkov wrote:
>
> Now, it looks to me like the whole resctrl thing begs for its own dir:
>
> arch/x86/kernel/cpu/resctrl/core.c
> arch/x86/kernel/cpu/resctrl/ctrlmondata.c
> arch/x86/kernel/cpu/resctrl/internal.h
> arch/x86/kernel/cpu/resctrl/monitor.c
> arch/x8
On Mon, Nov 19, 2018 at 11:53:33AM -0700, Jason Gunthorpe wrote:
> On Mon, Nov 19, 2018 at 01:42:16PM -0500, Jerome Glisse wrote:
> > On Mon, Nov 19, 2018 at 11:27:52AM -0700, Jason Gunthorpe wrote:
> > > On Mon, Nov 19, 2018 at 11:48:54AM -0500, Jerome Glisse wrote:
> > >
> > > > Just to comment
On Mon, 19 Nov 2018, Jerome Glisse wrote:
> > IIRC this is solved in IB by automatically calling
> > madvise(MADV_DONTFORK) before creating the MR.
> >
> > MADV_DONTFORK
> > .. This is useful to prevent copy-on-write semantics from changing the
> > physical location of a page if the parent wri
On Mon, Nov 19, 2018 at 07:19:04PM +, Christopher Lameter wrote:
> On Mon, 19 Nov 2018, Jerome Glisse wrote:
>
> > > IIRC this is solved in IB by automatically calling
> > > madvise(MADV_DONTFORK) before creating the MR.
> > >
> > > MADV_DONTFORK
> > > .. This is useful to prevent copy-on-wr
On Mon, Nov 19, 2018 at 02:17:21PM -0500, Jerome Glisse wrote:
> On Mon, Nov 19, 2018 at 11:53:33AM -0700, Jason Gunthorpe wrote:
> > On Mon, Nov 19, 2018 at 01:42:16PM -0500, Jerome Glisse wrote:
> > > On Mon, Nov 19, 2018 at 11:27:52AM -0700, Jason Gunthorpe wrote:
> > > > On Mon, Nov 19, 2018 at
On Mon, Nov 19, 2018 at 12:27:02PM -0700, Jason Gunthorpe wrote:
> On Mon, Nov 19, 2018 at 02:17:21PM -0500, Jerome Glisse wrote:
> > On Mon, Nov 19, 2018 at 11:53:33AM -0700, Jason Gunthorpe wrote:
> > > On Mon, Nov 19, 2018 at 01:42:16PM -0500, Jerome Glisse wrote:
> > > > On Mon, Nov 19, 2018 at
Boris/Thomas,
> -Original Message-
> From: Thomas Gleixner
> Sent: Monday, November 19, 2018 1:14 PM
> To: Borislav Petkov
> Cc: Moger, Babu ; mi...@redhat.com;
> cor...@lwn.net; fenghua...@intel.com; reinette.cha...@intel.com;
> pet...@infradead.org; gre...@linuxfoundation.org;
> da...@
On Mon, Nov 19, 2018 at 02:46:32PM -0500, Jerome Glisse wrote:
> > ?? How can O_DIRECT be fine but RDMA not? They use exactly the same
> > get_user_pages flow, right? Can we do what O_DIRECT does in RDMA and
> > be fine too?
> >
> > AFAIK the only difference is the length of the race window. You'
On Mon, Nov 19, 2018 at 08:11:36PM +, Moger, Babu wrote:
> Changed core.c and internel.h to res.c and res.h respectively. Both of
> these files are about resource definitions and initialization.
I guess but the core.c thing we do a lot in the kernel:
$ git ls-files | grep -E "/core\.c" | wc -
On 11/19/18 2:22 PM, Borislav Petkov wrote:
> On Mon, Nov 19, 2018 at 08:11:36PM +, Moger, Babu wrote:
>> Changed core.c and internel.h to res.c and res.h respectively. Both of
>> these files are about resource definitions and initialization.
>
> I guess but the core.c thing we do a lot in t
On Mon, Nov 19, 2018 at 01:11:56PM -0700, Jason Gunthorpe wrote:
> On Mon, Nov 19, 2018 at 02:46:32PM -0500, Jerome Glisse wrote:
>
> > > ?? How can O_DIRECT be fine but RDMA not? They use exactly the same
> > > get_user_pages flow, right? Can we do what O_DIRECT does in RDMA and
> > > be fine too
There are a few sysfs entries being exposed to user space by the
ina2xx hwmon driver while not getting explicitly documented. So
this patch just adds a description section for them.
Signed-off-by: Nicolin Chen
---
Documentation/hwmon/ina2xx | 15 +++
1 file changed, 15 insertions(+)
On Mon, Nov 19, 2018 at 03:26:15PM -0500, Jerome Glisse wrote:
> On Mon, Nov 19, 2018 at 01:11:56PM -0700, Jason Gunthorpe wrote:
> > On Mon, Nov 19, 2018 at 02:46:32PM -0500, Jerome Glisse wrote:
> >
> > > > ?? How can O_DIRECT be fine but RDMA not? They use exactly the same
> > > > get_user_page
Hi all,
On Wed, May 16, 2018 at 11:18:45AM +0300, Yury Norov wrote:
> This series enables AARCH64 with ILP32 mode.
>
> As supporting work, it introduces ARCH_32BIT_OFF_T configuration
> option that is enabled for existing 32-bit architectures but disabled
> for new arches (so 64-bit off_t userspa
On Mon, Nov 19, 2018 at 02:26:38PM -0700, Jason Gunthorpe wrote:
> On Mon, Nov 19, 2018 at 03:26:15PM -0500, Jerome Glisse wrote:
> > On Mon, Nov 19, 2018 at 01:11:56PM -0700, Jason Gunthorpe wrote:
> > > On Mon, Nov 19, 2018 at 02:46:32PM -0500, Jerome Glisse wrote:
> > >
> > > > > ?? How can O_D
On Mon, Nov 19, 2018 at 04:33:20PM -0500, Jerome Glisse wrote:
> On Mon, Nov 19, 2018 at 02:26:38PM -0700, Jason Gunthorpe wrote:
> > On Mon, Nov 19, 2018 at 03:26:15PM -0500, Jerome Glisse wrote:
> > > On Mon, Nov 19, 2018 at 01:11:56PM -0700, Jason Gunthorpe wrote:
> > > > On Mon, Nov 19, 2018 at
Add shadow stack pages to memory accounting.
Signed-off-by: Yu-cheng Yu
---
mm/mmap.c | 5 +
1 file changed, 5 insertions(+)
diff --git a/mm/mmap.c b/mm/mmap.c
index 30836512ca79..9560d69fa08c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1701,6 +1701,9 @@ static inline int accountable_mapping
Add the following shadow stack management instructions.
INCSSP:
Increment shadow stack pointer by the steps specified.
RDSSP:
Read SSP register into a GPR.
SAVEPREVSSP:
Use "prev ssp" token at top of current shadow stack to
create a "restore token" on previous shadow stack.
RSTO
1 - 100 of 154 matches
Mail list logo
