linux-kernel - Re: [PATCH v2 07/10] mm/kasan: Support non-blocking GFP in kasan_populate

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Message-ID: <a012baae-d206-45de-a390-cddb78a5d379@gmail.com>
Date: Thu, 18 Sep 2025 16:56:18 +0200
From: Andrey Ryabinin <ryabinin.a.a@...il.com>
To: "Uladzislau Rezki (Sony)" <urezki@...il.com>, linux-mm@...ck.org,
 Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...nel.org>, Baoquan He <bhe@...hat.com>,
 LKML <linux-kernel@...r.kernel.org>, Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH v2 07/10] mm/kasan: Support non-blocking GFP in
 kasan_populate_vmalloc()

On 9/15/25 3:40 PM, Uladzislau Rezki (Sony) wrote:
> A "gfp_mask" is already passed to kasan_populate_vmalloc() as
> an argument to respect GFPs from callers and KASAN uses it for
> its internal allocations.
> 
> But apply_to_page_range() function ignores GFP flags due to a
> hard-coded mask.
> 
> Wrap the call with memalloc_apply_gfp_scope()/memalloc_restore_scope()
> so that non-blocking GFP flags(GFP_ATOMIC, GFP_NOWAIT) are respected.
> 
> Cc: Andrey Ryabinin <ryabinin.a.a@...il.com>
> Cc: Alexander Potapenko <glider@...gle.com>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
> ---

Reviewed-by: Andrey Ryabinin <ryabinin.a.a@...il.com>