From: Michal Hocko <mhocko@suse.com>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Linux-MM <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
NeilBrown <neilb@suse.de>,
Thierry Reding <thierry.reding@gmail.com>,
Matthew Wilcox <willy@infradead.org>,
Vlastimil Babka <vbabka@suse.cz>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/7] mm/page_alloc: Give GFP_ATOMIC and non-blocking allocations access to reserves
Date: Wed, 11 Jan 2023 16:58:02 +0100 [thread overview]
Message-ID: <Y77cikPSHepZ/GQj@dhcp22.suse.cz> (raw)
In-Reply-To: <20230109151631.24923-7-mgorman@techsingularity.net>
On Mon 09-01-23 15:16:30, Mel Gorman wrote:
> Explicit GFP_ATOMIC allocations get flagged ALLOC_HARDER which is a bit
> vague. In preparation for removing __GFP_ATOMIC, give GFP_ATOMIC and
> other non-blocking allocation requests equal access to reserve. Rename
> ALLOC_HARDER to ALLOC_NON_BLOCK to make it more clear what the flag
> means.
GFP_NOWAIT can be also used for opportunistic allocations which can and
should fail quickly if the memory is tight and more elaborate path
should be taken (e.g. try higher order allocation first but fall back to
smaller request if the memory is fragmented). Do we really want to give
those access to memory reserves as well?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2023-01-11 15:58 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 15:16 [PATCH 0/6 v2] Discard __GFP_ATOMIC Mel Gorman
2023-01-09 15:16 ` [PATCH 1/7] mm/page_alloc: Rename ALLOC_HIGH to ALLOC_MIN_RESERVE Mel Gorman
2023-01-11 15:18 ` Michal Hocko
2023-01-12 9:26 ` Mel Gorman
2023-01-09 15:16 ` [PATCH 2/7] mm/page_alloc: Treat RT tasks similar to __GFP_HIGH Mel Gorman
2023-01-11 15:27 ` Michal Hocko
2023-01-12 9:36 ` Mel Gorman
2023-01-12 9:47 ` Michal Hocko
2023-01-12 16:42 ` Mel Gorman
2023-01-13 9:04 ` David Laight
2023-01-13 11:09 ` Mel Gorman
2023-01-09 15:16 ` [PATCH 3/7] mm/page_alloc: Explicitly record high-order atomic allocations in alloc_flags Mel Gorman
2023-01-10 15:28 ` Vlastimil Babka
2023-01-11 15:36 ` Michal Hocko
2023-01-12 9:38 ` Mel Gorman
2023-01-09 15:16 ` [PATCH 4/7] mm/page_alloc: Explicitly define what alloc flags deplete min reserves Mel Gorman
2023-01-11 14:04 ` Vlastimil Babka
2023-01-11 15:37 ` Michal Hocko
2023-01-09 15:16 ` [PATCH 5/7] mm/page_alloc.c: Allow __GFP_NOFAIL requests deeper access to reserves Mel Gorman
2023-01-11 14:05 ` Vlastimil Babka
2023-01-11 15:46 ` Michal Hocko
2023-01-12 9:43 ` Mel Gorman
2023-01-09 15:16 ` [PATCH 6/7] mm/page_alloc: Give GFP_ATOMIC and non-blocking allocations " Mel Gorman
2023-01-11 14:12 ` Vlastimil Babka
2023-01-11 15:58 ` Michal Hocko [this message]
2023-01-11 17:05 ` Mel Gorman
2023-01-12 8:11 ` Michal Hocko
2023-01-12 8:29 ` Michal Hocko
2023-01-12 9:24 ` Mel Gorman
2023-01-12 9:45 ` Michal Hocko
2023-01-14 22:10 ` NeilBrown
2023-01-16 10:29 ` Mel Gorman
2023-01-09 15:16 ` [PATCH 7/7] mm: discard __GFP_ATOMIC Mel Gorman
2023-01-12 8:12 ` Michal Hocko
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