From: Vlastimil Babka <vbabka@suse.cz>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, mhocko@kernel.org
Cc: linux-mm@kvack.org, akpm@linux-foundation.org,
iamjoonsoo.kim@lge.com, riel@redhat.com, rientjes@google.com,
mgorman@techsingularity.net, hannes@cmpxchg.org,
linux-kernel@vger.kernel.org, torvalds@linux-foundation.org
Subject: Re: [RFC 02/13] mm, page_alloc: set alloc_flags only once in slowpath
Date: Tue, 10 May 2016 14:30:11 +0200 [thread overview]
Message-ID: <5731D453.8050104@suse.cz> (raw)
In-Reply-To: <201605102028.AAC26596.SMHOQOtLOFFFVJ@I-love.SAKURA.ne.jp>
On 05/10/2016 01:28 PM, Tetsuo Handa wrote:
> Vlastimil Babka wrote:
>> In __alloc_pages_slowpath(), alloc_flags doesn't change after it's initialized,
>> so move the initialization above the retry: label. Also make the comment above
>> the initialization more descriptive.
>
> Not true. gfp_to_alloc_flags() will include ALLOC_NO_WATERMARKS if current
> thread got TIF_MEMDIE after gfp_to_alloc_flags() was called for the first
Oh, right. Stupid global state.
> time. Do you want to make TIF_MEMDIE threads fail their allocations without
> using memory reserves?
No, thanks for catching this. How about the following version? I think
that's even nicer cleanup, if correct. Note it causes a conflict in
patch 03/13 but it's simple to resolve.
Thanks
----8<----
next prev parent reply other threads:[~2016-05-10 12:30 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 7:35 [RFC 00/13] make direct compaction more deterministic Vlastimil Babka
2016-05-10 7:35 ` [RFC 01/13] mm, compaction: don't isolate PageWriteback pages in MIGRATE_SYNC_LIGHT mode Vlastimil Babka
2016-05-11 12:40 ` Michal Hocko
2016-05-10 7:35 ` [RFC 02/13] mm, page_alloc: set alloc_flags only once in slowpath Vlastimil Babka
2016-05-10 11:28 ` Tetsuo Handa
2016-05-10 12:30 ` Vlastimil Babka [this message]
2016-05-12 12:41 ` Michal Hocko
2016-05-31 6:20 ` Joonsoo Kim
2016-05-31 7:59 ` Vlastimil Babka
2016-06-02 1:50 ` Joonsoo Kim
2016-05-10 7:35 ` [RFC 03/13] mm, page_alloc: don't retry initial attempt " Vlastimil Babka
2016-05-12 12:48 ` Michal Hocko
2016-05-31 6:25 ` Joonsoo Kim
2016-05-31 12:03 ` Vlastimil Babka
2016-05-10 7:35 ` [RFC 04/13] mm, page_alloc: restructure direct compaction handling " Vlastimil Babka
2016-05-12 13:29 ` Michal Hocko
2016-05-13 8:10 ` Vlastimil Babka
2016-05-13 8:31 ` Michal Hocko
2016-05-10 7:35 ` [RFC 05/13] mm, page_alloc: make THP-specific decisions more generic Vlastimil Babka
2016-05-12 13:43 ` Michal Hocko
2016-05-10 7:35 ` [RFC 06/13] mm, thp: remove __GFP_NORETRY from khugepaged and madvised allocations Vlastimil Babka
2016-05-12 16:20 ` Michal Hocko
2016-05-13 8:23 ` Vlastimil Babka
2016-05-13 12:05 ` Michal Hocko
2016-05-18 11:59 ` Vlastimil Babka
2016-05-18 15:24 ` Michal Hocko
2016-05-20 13:57 ` Vlastimil Babka
2016-05-23 8:39 ` Michal Hocko
2016-05-10 7:35 ` [RFC 07/13] mm, compaction: introduce direct compaction priority Vlastimil Babka
2016-05-13 12:37 ` Michal Hocko
2016-05-10 7:35 ` [RFC 08/13] mm, compaction: simplify contended compaction handling Vlastimil Babka
2016-05-13 13:09 ` Michal Hocko
2016-05-16 7:10 ` Vlastimil Babka
2016-05-10 7:35 ` [RFC 09/13] mm, compaction: make whole_zone flag ignore cached scanner positions Vlastimil Babka
2016-05-13 13:23 ` Michal Hocko
2016-05-10 7:36 ` [RFC 10/13] mm, compaction: cleanup unused functions Vlastimil Babka
2016-05-10 7:36 ` [RFC 11/13] mm, compaction: add the ultimate direct compaction priority Vlastimil Babka
2016-05-13 13:38 ` Michal Hocko
2016-05-16 7:17 ` Vlastimil Babka
2016-05-16 8:11 ` Michal Hocko
2016-05-18 12:46 ` Vlastimil Babka
2016-05-10 7:36 ` [RFC 12/13] mm, compaction: more reliably increase " Vlastimil Babka
2016-05-10 12:55 ` Vlastimil Babka
2016-05-13 14:15 ` Michal Hocko
2016-05-16 7:31 ` Vlastimil Babka
2016-05-16 8:14 ` Michal Hocko
2016-05-16 9:27 ` Vlastimil Babka
2016-05-16 9:52 ` Michal Hocko
2016-05-31 6:37 ` Joonsoo Kim
2016-05-31 12:07 ` Vlastimil Babka
2016-05-31 12:29 ` Vlastimil Babka
2016-06-02 2:50 ` Joonsoo Kim
2016-05-10 7:36 ` [RFC 13/13] mm, compaction: fix and improve watermark handling Vlastimil Babka
2016-05-16 9:25 ` Michal Hocko
2016-05-16 9:50 ` Vlastimil Babka
2016-05-16 12:30 ` Michal Hocko
2016-05-18 13:50 ` Mel Gorman
2016-05-18 14:27 ` Michal Hocko
2016-05-18 14:40 ` Mel Gorman
2016-05-17 20:01 ` [RFC 00/13] make direct compaction more deterministic Michal Hocko
2016-05-18 7:19 ` Vlastimil Babka
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