From: Vlastimil Babka <vbabka@suse.cz>
To: Michal Hocko <mhocko@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Chinner <david@fromorbit.com>, Neil Brown <neilb@suse.de>,
Christoph Hellwig <hch@lst.de>,
Uladzislau Rezki <urezki@gmail.com>,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
LKML <linux-kernel@vger.kernel.org>,
Ilya Dryomov <idryomov@gmail.com>,
Jeff Layton <jlayton@kernel.org>, Michal Hocko <mhocko@suse.com>
Subject: Re: [PATCH v2 3/4] mm/vmalloc: be more explicit about supported gfp flags.
Date: Fri, 26 Nov 2021 16:39:35 +0100 [thread overview]
Message-ID: <e98a7a8e-3365-c27f-d267-982ddc94f948@suse.cz> (raw)
In-Reply-To: <20211122153233.9924-4-mhocko@kernel.org>
On 11/22/21 16:32, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> b7d90e7a5ea8 ("mm/vmalloc: be more explicit about supported gfp flags")
> has been merged prematurely without the rest of the series and without
> addressed review feedback from Neil. Fix that up now. Only wording is
> changed slightly.
>
> Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
> ---
> mm/vmalloc.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index b6aed4f94a85..b1c115ec13be 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -3021,12 +3021,14 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
> *
> * Allocate enough pages to cover @size from the page level
> * allocator with @gfp_mask flags. Please note that the full set of gfp
> - * flags are not supported. GFP_KERNEL would be a preferred allocation mode
> - * but GFP_NOFS and GFP_NOIO are supported as well. Zone modifiers are not
> - * supported. From the reclaim modifiers__GFP_DIRECT_RECLAIM is required (aka
> - * GFP_NOWAIT is not supported) and only __GFP_NOFAIL is supported (aka
> - * __GFP_NORETRY and __GFP_RETRY_MAYFAIL are not supported).
> - * __GFP_NOWARN can be used to suppress error messages about failures.
> + * flags are not supported. GFP_KERNEL, GFP_NOFS and GFP_NOIO are all
> + * supported.
> + * Zone modifiers are not supported. From the reclaim modifiers
> + * __GFP_DIRECT_RECLAIM is required (aka GFP_NOWAIT is not supported)
> + * and only __GFP_NOFAIL is supported (i.e. __GFP_NORETRY and
> + * __GFP_RETRY_MAYFAIL are not supported).
> + *
> + * __GFP_NOWARN can be used to suppress failures messages.
> *
> * Map them into contiguous kernel virtual space, using a pagetable
> * protection of @prot.
>
next prev parent reply other threads:[~2021-11-26 15:41 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-22 15:32 [PATCH v2 0/4] extend vmalloc support for constrained allocations Michal Hocko
2021-11-22 15:32 ` [PATCH v2 1/4] mm/vmalloc: alloc GFP_NO{FS,IO} for vmalloc Michal Hocko
2021-11-23 19:05 ` Uladzislau Rezki
2021-11-26 15:13 ` Vlastimil Babka
2021-11-22 15:32 ` [PATCH v2 2/4] mm/vmalloc: add support for __GFP_NOFAIL Michal Hocko
2021-11-23 19:01 ` Uladzislau Rezki
2021-11-23 20:09 ` Michal Hocko
2021-11-24 20:46 ` Uladzislau Rezki
2021-11-24 1:02 ` Andrew Morton
2021-11-24 3:16 ` NeilBrown
2021-11-24 3:48 ` Andrew Morton
2021-11-24 5:23 ` NeilBrown
2021-11-25 0:32 ` Theodore Y. Ts'o
2021-11-26 14:50 ` Vlastimil Babka
2021-11-26 15:09 ` Michal Hocko
2021-11-24 23:45 ` Dave Chinner
2021-11-24 8:43 ` Michal Hocko
2021-11-24 20:37 ` Uladzislau Rezki
2021-11-25 8:48 ` Michal Hocko
2021-11-25 18:40 ` Uladzislau Rezki
2021-11-25 19:21 ` Michal Hocko
2021-11-24 20:11 ` Uladzislau Rezki
2021-11-25 8:46 ` Michal Hocko
2021-11-25 18:02 ` Uladzislau Rezki
2021-11-25 19:24 ` Michal Hocko
2021-11-25 20:03 ` Uladzislau Rezki
2021-11-25 20:13 ` Michal Hocko
2021-11-25 20:21 ` Uladzislau Rezki
2021-11-26 10:48 ` Michal Hocko
2021-11-28 0:00 ` Andrew Morton
2021-11-29 8:56 ` Michal Hocko
2021-11-26 15:32 ` Vlastimil Babka
2021-11-22 15:32 ` [PATCH v2 3/4] mm/vmalloc: be more explicit about supported gfp flags Michal Hocko
2021-11-23 18:58 ` Uladzislau Rezki
2021-11-26 15:39 ` Vlastimil Babka [this message]
2021-11-22 15:32 ` [PATCH v2 4/4] mm: allow !GFP_KERNEL allocations for kvmalloc Michal Hocko
2021-11-23 18:57 ` Uladzislau Rezki
2021-11-23 19:02 ` Uladzislau Rezki
2021-11-26 15:50 ` Vlastimil Babka
2021-11-24 22:55 ` [PATCH v2 0/4] extend vmalloc support for constrained allocations Dave Chinner
2021-11-25 8:58 ` Michal Hocko
2021-11-25 9:30 ` Michal Hocko
2021-11-25 21:30 ` Dave Chinner
2021-11-26 9:20 ` Vlastimil Babka
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