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Message-ID: <fb157154-5661-4925-b2c5-7952188b28f5@redhat.com>
Date: Thu, 8 Feb 2024 17:48:26 +0100
From: David Hildenbrand <david@...hat.com>
To: Anshuman Khandual <anshuman.khandual@....com>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] fs/proc/task_mmu: Add display flag for VM_MAYOVERLAY
On 08.02.24 09:48, Anshuman Khandual wrote:
> VM_UFFD_MISSING flag is mutually exclussive with VM_MAYOVERLAY flag as they
> both use the same bit position i.e 0x00000200 in the vm_flags. Let's update
> show_smap_vma_flags() to display the correct flags depending on CONFIG_MMU.
>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-fsdevel@...r.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
> This applies on v6.8-rc3
>
> fs/proc/task_mmu.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
> index 3f78ebbb795f..1c4eb25cfc17 100644
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -681,7 +681,11 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
> [ilog2(VM_HUGEPAGE)] = "hg",
> [ilog2(VM_NOHUGEPAGE)] = "nh",
> [ilog2(VM_MERGEABLE)] = "mg",
> +#ifdef CONFIG_MMU
> [ilog2(VM_UFFD_MISSING)]= "um",
> +#else
> + [ilog2(VM_MAYOVERLAY)] = "ov",
> +#endif /* CONFIG_MMU */
> [ilog2(VM_UFFD_WP)] = "uw",
> #ifdef CONFIG_ARM64_MTE
> [ilog2(VM_MTE)] = "mt",
Reviewed-by: David Hildenbrand <david@...hat.com>
--
Cheers,
David / dhildenb
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