Re: + mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2.patch added to -mm tree

[Andrey Ryabinin]

On 07/20/2016 09:43 PM, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> 
> The patch titled
>      Subject: mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix
> has been added to the -mm tree.  Its filename is
>      mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2.patch
> 
> This patch should soon appear at
>     http://ozlabs.org/~akpm/mmots/broken-out/mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2.patch
> and later at
>     http://ozlabs.org/~akpm/mmotm/broken-out/mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2.patch
> 
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> 
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
> 
> The -mm tree is included into linux-next and is updated
> there every 3-4 working days
> 
> ------------------------------------------------------
> From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
> Subject: mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix
> 

This should be a separate patch. Stackdepot was added in cd11016e5f5212c13c0cec7384a525edc93b4921
which is in v4.6.

> use __GFP_NOWARN for stack
> 
> Link: http://lkml.kernel.org/r/20160720151905.GB19146@xxxxxxxxxxxxxxxxxx
> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
> Cc: Alexander Potapenko <glider@xxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>
> Cc: David Rientjes <rientjes@xxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> ---
> 
>  lib/stackdepot.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff -puN lib/stackdepot.c~mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2 lib/stackdepot.c
> --- a/lib/stackdepot.c~mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2
> +++ a/lib/stackdepot.c
> @@ -242,6 +242,7 @@ depot_stack_handle_t depot_save_stack(st
>  		 */
>  		alloc_flags &= ~GFP_ZONEMASK;
>  		alloc_flags &= (GFP_ATOMIC | GFP_KERNEL);
> +		alloc_flags |= __GFP_NOWARN;
>  		page = alloc_pages(alloc_flags, STACK_ALLOC_ORDER);
>  		if (page)
>  			prealloc = page_address(page);
> _
> 
> Patches currently in -mm which might be from kirill@xxxxxxxxxxxxx are
> 
> mm-kasan-switch-slub-to-stackdepot-enable-memory-quarantine-for-slub-fix-2.patch
>