From: Michal Hocko <mhocko@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@suse.de>, NeilBrown <neilb@suse.com>,
LKML <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: [PATCH 2/6] mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic
Date: Mon, 26 Jun 2017 14:38:48 +0200 [thread overview]
Message-ID: <20170626123847.GM11534@dhcp22.suse.cz> (raw)
In-Reply-To: <82f5331e-8a3d-ed61-3d5d-3dfcbf557072@suse.cz>
On Mon 26-06-17 14:17:30, Vlastimil Babka wrote:
> On 06/26/2017 02:14 PM, Michal Hocko wrote:
> > On Mon 26-06-17 13:45:19, Vlastimil Babka wrote:
> >> On 06/23/2017 10:53 AM, Michal Hocko wrote:
> > [...]
> >>> - GFP_KERNEL - both background and direct reclaim are allowed and the
> >>> _default_ page allocator behavior is used. That means that !costly
> >>> allocation requests are basically nofail (unless the requesting task
> >>> is killed by the OOM killer)
> >>
> >> Should we explicitly point out that failure must be handled? After lots
> >> of talking about "too small to fail", people might get the wrong impression.
> >
> > OK. What about the following.
> > "That means that !costly allocation requests are basically nofail but
> > there is no guarantee of thaat behavior so failures have to be checked
>
> that
>
> > properly by callers (e.g. OOM killer victim is allowed to fail
> > currently).
>
> Looks good, thanks!
Andrew, could you fold the following in and replace the GFP_KERNEL part
of the changelog with the updated text. Thanks!
---
next prev parent reply other threads:[~2017-06-26 12:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-23 8:53 [PATCH 0/6] mm: give __GFP_REPEAT a better semantic Michal Hocko
2017-06-23 8:53 ` [PATCH 1/6] MIPS: do not use __GFP_REPEAT for order-0 request Michal Hocko
2017-06-23 10:27 ` Ralf Baechle
2017-06-26 9:36 ` Vlastimil Babka
2017-06-23 8:53 ` [PATCH 2/6] mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic Michal Hocko
2017-06-26 11:45 ` Vlastimil Babka
2017-06-26 12:14 ` Michal Hocko
2017-06-26 12:17 ` Vlastimil Babka
2017-06-26 12:38 ` Michal Hocko [this message]
2017-06-26 12:42 ` Michal Hocko
2017-06-26 11:53 ` Vlastimil Babka
2017-06-23 8:53 ` [PATCH 3/6] xfs: map KM_MAYFAIL to __GFP_RETRY_MAYFAIL Michal Hocko
2017-06-27 8:49 ` Michal Hocko
2017-06-27 13:47 ` Christoph Hellwig
2017-06-27 14:06 ` Michal Hocko
2017-06-28 4:12 ` Darrick J. Wong
2017-06-23 8:53 ` [PATCH 4/6] mm: kvmalloc support __GFP_RETRY_MAYFAIL for all sizes Michal Hocko
2017-06-26 12:00 ` Vlastimil Babka
2017-06-26 12:18 ` Michal Hocko
2017-06-23 8:53 ` [PATCH 5/6] drm/i915: use __GFP_RETRY_MAYFAIL Michal Hocko
2017-06-23 8:53 ` [PATCH 6/6] mm, migration: do not trigger OOM killer when migrating memory Michal Hocko
2017-06-23 20:43 ` Andrew Morton
2017-06-26 5:28 ` Michal Hocko
2017-06-26 12:13 ` Vlastimil Babka
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