From: Nick Piggin <npiggin@suse.de>
To: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Lubos Lunak <l.lunak@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch] mm: add comment about deprecation of __GFP_NOFAIL
Date: Tue, 16 Feb 2010 18:23:49 +1100 [thread overview]
Message-ID: <20100216072349.GI5723@laptop> (raw)
In-Reply-To: <alpine.DEB.2.00.1002152300580.2745@chino.kir.corp.google.com>
On Mon, Feb 15, 2010 at 11:03:50PM -0800, David Rientjes wrote:
> On Tue, 16 Feb 2010, KAMEZAWA Hiroyuki wrote:
>
> > I hope no 3rd vendor (proprietary) driver uses __GFP_NOFAIL, they tend to
> > believe API is trustable and unchanged.
> >
>
> I hope they don't use it with GFP_ATOMIC, either, because it's never been
> respected in that context. We can easily audit the handful of cases in
> the kernel that use __GFP_NOFAIL (it takes five minutes at the max) and
> prove that none use it with GFP_ATOMIC or GFP_NOFS. We don't need to add
> multitudes of warnings about using a deprecated flag with ludicrous
> combinations (does anyone really expect GFP_ATOMIC | __GFP_NOFAIL to work
> gracefully)?
You don't need to add warnings, just don't break existing working
combinations and nobody has anything to complain about.
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <npiggin@suse.de>
To: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Rik van Riel <riel@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Lubos Lunak <l.lunak@suse.cz>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch] mm: add comment about deprecation of __GFP_NOFAIL
Date: Tue, 16 Feb 2010 18:23:49 +1100 [thread overview]
Message-ID: <20100216072349.GI5723@laptop> (raw)
In-Reply-To: <alpine.DEB.2.00.1002152300580.2745@chino.kir.corp.google.com>
On Mon, Feb 15, 2010 at 11:03:50PM -0800, David Rientjes wrote:
> On Tue, 16 Feb 2010, KAMEZAWA Hiroyuki wrote:
>
> > I hope no 3rd vendor (proprietary) driver uses __GFP_NOFAIL, they tend to
> > believe API is trustable and unchanged.
> >
>
> I hope they don't use it with GFP_ATOMIC, either, because it's never been
> respected in that context. We can easily audit the handful of cases in
> the kernel that use __GFP_NOFAIL (it takes five minutes at the max) and
> prove that none use it with GFP_ATOMIC or GFP_NOFS. We don't need to add
> multitudes of warnings about using a deprecated flag with ludicrous
> combinations (does anyone really expect GFP_ATOMIC | __GFP_NOFAIL to work
> gracefully)?
You don't need to add warnings, just don't break existing working
combinations and nobody has anything to complain about.
--
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next prev parent reply other threads:[~2010-02-16 7:23 UTC|newest]
Thread overview: 145+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-15 22:19 [patch -mm 0/9 v2] oom killer rewrite David Rientjes
2010-02-15 22:19 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 1/9 v2] oom: filter tasks not sharing the same cpuset David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-16 6:14 ` Nick Piggin
2010-02-16 6:14 ` Nick Piggin
2010-02-15 22:20 ` [patch -mm 2/9 v2] oom: sacrifice child with highest badness score for parent David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-16 6:15 ` Nick Piggin
2010-02-16 6:15 ` Nick Piggin
2010-02-15 22:20 ` [patch -mm 3/9 v2] oom: select task from tasklist for mempolicy ooms David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-23 6:31 ` Balbir Singh
2010-02-23 6:31 ` Balbir Singh
2010-02-23 8:17 ` David Rientjes
2010-02-23 8:17 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 4/9 v2] oom: remove compulsory panic_on_oom mode David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-16 0:00 ` KAMEZAWA Hiroyuki
2010-02-16 0:00 ` KAMEZAWA Hiroyuki
2010-02-16 0:14 ` David Rientjes
2010-02-16 0:14 ` David Rientjes
2010-02-16 0:23 ` KAMEZAWA Hiroyuki
2010-02-16 0:23 ` KAMEZAWA Hiroyuki
2010-02-16 9:02 ` David Rientjes
2010-02-16 9:02 ` David Rientjes
2010-02-16 23:42 ` KAMEZAWA Hiroyuki
2010-02-16 23:42 ` KAMEZAWA Hiroyuki
2010-02-16 23:54 ` David Rientjes
2010-02-16 23:54 ` David Rientjes
2010-02-17 0:01 ` KAMEZAWA Hiroyuki
2010-02-17 0:01 ` KAMEZAWA Hiroyuki
2010-02-17 0:31 ` David Rientjes
2010-02-17 0:31 ` David Rientjes
2010-02-17 0:41 ` KAMEZAWA Hiroyuki
2010-02-17 0:41 ` KAMEZAWA Hiroyuki
2010-02-17 0:54 ` David Rientjes
2010-02-17 0:54 ` David Rientjes
2010-02-17 1:03 ` KAMEZAWA Hiroyuki
2010-02-17 1:03 ` KAMEZAWA Hiroyuki
2010-02-17 1:58 ` David Rientjes
2010-02-17 1:58 ` David Rientjes
2010-02-17 2:13 ` KAMEZAWA Hiroyuki
2010-02-17 2:13 ` KAMEZAWA Hiroyuki
2010-02-17 2:23 ` KAMEZAWA Hiroyuki
2010-02-17 2:23 ` KAMEZAWA Hiroyuki
2010-02-17 2:37 ` David Rientjes
2010-02-17 2:37 ` David Rientjes
2010-02-17 2:28 ` David Rientjes
2010-02-17 2:28 ` David Rientjes
2010-02-17 2:34 ` KAMEZAWA Hiroyuki
2010-02-17 2:34 ` KAMEZAWA Hiroyuki
2010-02-17 2:58 ` David Rientjes
2010-02-17 2:58 ` David Rientjes
2010-02-17 3:21 ` KAMEZAWA Hiroyuki
2010-02-17 3:21 ` KAMEZAWA Hiroyuki
2010-02-17 9:11 ` David Rientjes
2010-02-17 9:11 ` David Rientjes
2010-02-17 9:52 ` Nick Piggin
2010-02-17 9:52 ` Nick Piggin
2010-02-17 22:04 ` David Rientjes
2010-02-17 22:04 ` David Rientjes
2010-02-22 5:31 ` Daisuke Nishimura
2010-02-22 6:15 ` KAMEZAWA Hiroyuki
2010-02-22 6:15 ` KAMEZAWA Hiroyuki
2010-02-22 11:42 ` Daisuke Nishimura
2010-02-22 11:42 ` Daisuke Nishimura
2010-02-22 20:59 ` David Rientjes
2010-02-22 20:59 ` David Rientjes
2010-02-22 23:51 ` KAMEZAWA Hiroyuki
2010-02-22 23:51 ` KAMEZAWA Hiroyuki
2010-02-22 20:55 ` David Rientjes
2010-02-22 20:55 ` David Rientjes
2010-02-17 2:19 ` KOSAKI Motohiro
2010-02-17 2:19 ` KOSAKI Motohiro
2010-02-16 6:20 ` Nick Piggin
2010-02-16 6:20 ` Nick Piggin
2010-02-16 6:59 ` David Rientjes
2010-02-16 6:59 ` David Rientjes
2010-02-16 7:20 ` Nick Piggin
2010-02-16 7:20 ` Nick Piggin
2010-02-16 7:53 ` David Rientjes
2010-02-16 7:53 ` David Rientjes
2010-02-16 8:08 ` Nick Piggin
2010-02-16 8:08 ` Nick Piggin
2010-02-16 8:10 ` KAMEZAWA Hiroyuki
2010-02-16 8:10 ` KAMEZAWA Hiroyuki
2010-02-16 8:42 ` David Rientjes
2010-02-16 8:42 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 5/9 v2] oom: badness heuristic rewrite David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 6/9 v2] oom: deprecate oom_adj tunable David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-15 22:28 ` Alan Cox
2010-02-15 22:28 ` Alan Cox
2010-02-15 22:35 ` David Rientjes
2010-02-15 22:35 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 7/9 v2] oom: replace sysctls with quick mode David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-16 6:28 ` Nick Piggin
2010-02-16 6:28 ` Nick Piggin
2010-02-16 8:58 ` David Rientjes
2010-02-16 8:58 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 8/9 v2] oom: avoid oom killer for lowmem allocations David Rientjes
2010-02-15 22:20 ` David Rientjes
2010-02-15 23:57 ` KAMEZAWA Hiroyuki
2010-02-15 23:57 ` KAMEZAWA Hiroyuki
2010-02-16 0:10 ` David Rientjes
2010-02-16 0:10 ` David Rientjes
2010-02-16 0:21 ` KAMEZAWA Hiroyuki
2010-02-16 0:21 ` KAMEZAWA Hiroyuki
2010-02-16 1:13 ` [patch] mm: add comment about deprecation of __GFP_NOFAIL David Rientjes
2010-02-16 1:13 ` David Rientjes
2010-02-16 1:26 ` KAMEZAWA Hiroyuki
2010-02-16 1:26 ` KAMEZAWA Hiroyuki
2010-02-16 7:03 ` David Rientjes
2010-02-16 7:03 ` David Rientjes
2010-02-16 7:23 ` Nick Piggin [this message]
2010-02-16 7:23 ` Nick Piggin
2010-02-16 5:32 ` [patch -mm 8/9 v2] oom: avoid oom killer for lowmem allocations KOSAKI Motohiro
2010-02-16 5:32 ` KOSAKI Motohiro
2010-02-16 7:29 ` David Rientjes
2010-02-16 7:29 ` David Rientjes
2010-02-16 6:44 ` Nick Piggin
2010-02-16 6:44 ` Nick Piggin
2010-02-16 7:41 ` David Rientjes
2010-02-16 7:41 ` David Rientjes
2010-02-16 7:53 ` Nick Piggin
2010-02-16 7:53 ` Nick Piggin
2010-02-16 8:25 ` David Rientjes
2010-02-16 8:25 ` David Rientjes
2010-02-16 23:48 ` KAMEZAWA Hiroyuki
2010-02-16 23:48 ` KAMEZAWA Hiroyuki
2010-02-17 0:03 ` David Rientjes
2010-02-17 0:03 ` David Rientjes
2010-02-17 0:03 ` KAMEZAWA Hiroyuki
2010-02-17 0:03 ` KAMEZAWA Hiroyuki
2010-02-17 0:21 ` David Rientjes
2010-02-17 0:21 ` David Rientjes
2010-02-23 11:24 ` Balbir Singh
2010-02-23 11:24 ` Balbir Singh
2010-02-23 21:12 ` David Rientjes
2010-02-23 21:12 ` David Rientjes
2010-02-15 22:20 ` [patch -mm 9/9 v2] oom: remove unnecessary code and cleanup David Rientjes
2010-02-15 22:20 ` David Rientjes
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