On 15.11.2023 14:11, Stefano Garzarella wrote:
> On Wed, Nov 08, 2023 at 10:20:04AM +0300, Arseniy Krasnov wrote:
>> This adds test which checks, that updating SO_RCVLOWAT value also sends
>
> You can avoid "This adds", and write just "Add test ...".
>
> See
>
On 15.11.2023 14:08, Stefano Garzarella wrote:
> On Wed, Nov 08, 2023 at 10:20:03AM +0300, Arseniy Krasnov wrote:
>> This adds sending credit update message when SO_RCVLOWAT is updated and
>> it is bigger than number of bytes in rx queue. It is needed, because
>> 'poll()' will wait until number
Hi Ilya,
kernel test robot noticed the following build errors:
[auto build test ERROR on s390/features]
[also build test ERROR on akpm-mm/mm-everything linus/master
vbabka-slab/for-next v6.7-rc1 next-20231116]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when
Hi,
when testing the EEVDF scheduler we stumbled upon a performance
regression in a uperf scenario and would like to
kindly ask for feedback on whether we are going into the right direction
with our analysis so far.
The base scenario are two KVM guests running on an s390 LPAR. One guest
On Wed, Nov 15, 2023 at 06:50:10PM +, Matthew Maurer wrote:
> Adds a new format for modversions which stores each field in a separate
> elf section.
The "why" is critical and not mentioned. And I'd like to also see
documented this with foresight, if Rust needed could this be used
in the
On Wed, Nov 15, 2023 at 9:35 PM Ilya Leoshkevich wrote:
>
> This is normally done by the generic entry code, but the
> kernel_stack_overflow() flow bypasses it.
>
> Signed-off-by: Ilya Leoshkevich
Reviewed-by: Alexander Potapenko
> ---
> arch/s390/kernel/traps.c | 2 ++
> 1 file changed, 2
On Thu, 2023-11-16 at 15:55 +0100, Alexander Potapenko wrote:
> On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich
> wrote:
> >
> > Avoid false KMSAN negatives with SLUB_DEBUG by allowing
> > kmsan_slab_free() to poison the freed memory, and by preventing
> > init_object() from unpoisoning new
On Wed, Nov 15, 2023 at 9:35 PM Ilya Leoshkevich wrote:
>
> The pages for the KMSAN metadata associated with most kernel mappings
> are taken from memblock by the common code. However, vmalloc and module
> metadata needs to be defined by the architectures.
>
> Be a little bit more careful than
On 11/13/23 09:56, Luca Weiss wrote:
Now that the WPSS remoteproc is enabled, enable wifi so we can use it.
Signed-off-by: Luca Weiss
---
Reviewed-by: Konrad Dybcio
Konrad
On 11/13/23 09:56, Luca Weiss wrote:
Enable the ADSP, CDSP, MPSS and WPSS that are found on the SoC.
Signed-off-by: Luca Weiss
---
Reviewed-by: Konrad Dybcio
Konrad
On 11/13/23 09:56, Luca Weiss wrote:
Add the node for the ADSP found on the SC7280 SoC, using standard
Qualcomm firmware.
Remove the reserved-memory node from sc7280-chrome-common since CDSP is
currently not used there.
Signed-off-by: Luca Weiss
---
Acked-by: Konrad Dybcio
[...]
+
On 11/13/23 09:56, Luca Weiss wrote:
Add the node for the ADSP found on the SC7280 SoC, using standard
Qualcomm firmware.
Signed-off-by: Luca Weiss
---
Acked-by: Konrad Dybcio
Konrad
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Avoid false KMSAN negatives with SLUB_DEBUG by allowing
> kmsan_slab_free() to poison the freed memory, and by preventing
> init_object() from unpoisoning new allocations.
>
> Signed-off-by: Ilya Leoshkevich
> ---
> mm/kmsan/hooks.c |
On 11/13/23 09:56, Luca Weiss wrote:
Add support for the ADSP, CDSP and WPSS remoteprocs found on the SC7280
SoC using the q6v5-pas driver.
This driver can be used on regular LA ("Linux Android") based releases,
however the SC7280 ChromeOS devices need different driver support due to
On 11/13/23 09:56, Luca Weiss wrote:
It was clarified a while ago that reserved-memory nodes shouldn't be
called memory@ but should have a descriptive name. Update sc7280.dtsi to
follow that.
Signed-off-by: Luca Weiss
---
Reviewed-by: Konrad Dybcio
Konrad
The pull request you sent on Tue, 14 Nov 2023 15:24:36 -0500:
> https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus
has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/372bed5fbb87314abf410c3916e51578cd382cd1
Thank you!
--
Deet-doot-dot, I am a
Following kernel crash noticed while running selftests: ftrace on arm64 Juno-r2
device running stable-rc linux-6.6.y kernel.
This kernel crash is hard to reproduce.
Reported-by: Linux Kernel Functional Testing
kselftest: Running tests in ftrace
TAP version 13
1..1
# timeout set to 0
#
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> The value assigned to prot is immediately overwritten on the next line
> with PAGE_KERNEL. The right hand side of the assignment has no
> side-effects.
>
> Fixes: b073d7f8aee4 ("mm: kmsan: maintain KMSAN metadata for page operations")
>
Hello,
syzbot found the following issue on:
HEAD commit:f31817cbcf48 Add linux-next specific files for 20231116
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11a32f9768
kernel config: https://syzkaller.appspot.com/x/.config?x=f59345f1d0a928c
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> On s390 the virtual address 0 is valid (current CPU's lowcore is mapped
> there), therefore KMSAN should not complain about it.
>
> Disable the respective check on s390. There doesn't seem to be a
> Kconfig option to describe this
Am 16.11.23 um 11:13 schrieb Ilya Leoshkevich:
It's also possible to get a free s390 machine at [1].
[1] https://linuxone.cloud.marist.edu/oss
I think the URL for registration is this one
https://linuxone.cloud.marist.edu/#/register?flag=VM
On Thu, 2023-11-16 at 09:42 +0100, Alexander Potapenko wrote:
> On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich
> wrote:
> >
> > Hi,
> >
> > This series provides the minimal support for Kernel Memory
> > Sanitizer on
> > s390. Kernel Memory Sanitizer is clang-only instrumentation for
> >
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Comparing pointers with TASK_SIZE does not make sense when kernel and
> userspace overlap. Assume that we are handling user memory access in
> this case.
>
> Reported-by: Alexander Gordeev
> Signed-off-by: Ilya Leoshkevich
Reviewed-by:
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Improve the readability by replacing the custom aligning logic with
> ALIGN_DOWN(). Unlike other places where a similar sequence is used,
> there is no size parameter that needs to be adjusted, so the standard
> macro fits.
Good catch,
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Adjust the stack size for the KMSAN-enabled kernel like it was done
> for the KASAN-enabled one in commit 7fef92ccadd7 ("s390/kasan: double
> the stack size"). Both tools have similar requirements.
>
> Reviewed-by: Alexander Gordeev
>
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Replace the x86-specific asm/pgtable_64_types.h #include with the
> linux/pgtable.h one, which all architectures have.
>
> Fixes: f80be4571b19 ("kmsan: add KMSAN runtime core")
> Suggested-by: Heiko Carstens
> Signed-off-by: Ilya
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> KMSAN relies on memblock returning all available pages to it
> (see kmsan_memblock_free_pages()). It partitions these pages into 3
> categories: pages available to the buddy allocator, shadow pages and
> origin pages. This partitioning
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> It's useful to have both tests and kmsan.panic=1 during development,
> but right now the warnings, that the tests cause, lead to kernel
> panics.
>
> Temporarily set kmsan.panic=0 for the duration of the KMSAN testing.
Nice!
>
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> All other sanitizers are disabled for these components as well.
>
> Reviewed-by: Alexander Gordeev
> Signed-off-by: Ilya Leoshkevich
Reviewed-by: Alexander Potapenko
(see a nit below)
> ---
> arch/s390/boot/Makefile | 1 +
>
On Thu, 2023-11-16 at 09:56 +0100, Alexander Potapenko wrote:
> On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich
> wrote:
> >
> > Like for KASAN, it's useful to temporarily disable KMSAN checks
> > around,
> > e.g., redzone accesses.
>
> This example is incorrect, because KMSAN does not have
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> When building the kmsan test as a module, modpost fails with the
> following error message:
>
> ERROR: modpost: "panic_on_kmsan" [mm/kmsan/kmsan_test.ko] undefined!
>
> Export panic_on_kmsan in order to improve the KMSAN usability
On Thu, Nov 16, 2023 at 10:04 AM Alexander Potapenko wrote:
>
> On Wed, Nov 15, 2023 at 9:35 PM Ilya Leoshkevich wrote:
> >
> > The unwind code can read uninitialized frames. Furthermore, even in
> > the good case, KMSAN does not emit shadow for backchains. Therefore
> > disable it for the
On Wed, Nov 15, 2023 at 9:35 PM Ilya Leoshkevich wrote:
>
> The unwind code can read uninitialized frames. Furthermore, even in
> the good case, KMSAN does not emit shadow for backchains. Therefore
> disable it for the unwinding functions.
>
> Signed-off-by: Ilya Leoshkevich
> ---
>
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Like for KASAN, it's useful to temporarily disable KMSAN checks around,
> e.g., redzone accesses.
This example is incorrect, because KMSAN does not have redzones.
You are calling these functions from "mm: slub: Let KMSAN access
On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich wrote:
>
> Hi,
>
> This series provides the minimal support for Kernel Memory Sanitizer on
> s390. Kernel Memory Sanitizer is clang-only instrumentation for finding
> accesses to uninitialized memory. The clang support for s390 has already
> been
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