From: Michal Hocko <mhocko@kernel.org> To: Brian Foster <bfoster@redhat.com> Cc: Christoph Hellwig <hch@lst.de>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, Xiong Zhou <xzhou@redhat.com>, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: mm allocation failure and hang when running xfstests generic/269 on xfs Date: Thu, 2 Mar 2017 16:47:44 +0100 [thread overview] Message-ID: <20170302154744.GN1404@dhcp22.suse.cz> (raw) In-Reply-To: <20170302153002.GG3213@bfoster.bfoster> On Thu 02-03-17 10:30:02, Brian Foster wrote: > On Thu, Mar 02, 2017 at 04:14:11PM +0100, Michal Hocko wrote: [...] > > I am not objecting to adding fatal_signal_pending as well I just thought > > that from the logic POV breaking after reaching the minimum size is just > > the right thing to do. We can optimize further by checking > > fatal_signal_pending and reducing retries when we know it doesn't make > > much sense but that should be done on top as an optimization IMHO. > > > > I don't think of it as an optimization to not invoke calls (a > non-deterministic number of times) that we know are going to fail, but the point is that vmalloc failure modes are an implementation detail which might change in the future. The fix should be really independent on the current implementation that is why I think the fatal_signal_pending is just an optimization. > ultimately I don't care too much how it's framed or if it's done in > separate patches or whatnot. As long as they are posted at the same > time. ;) Done -- Michal Hocko SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Brian Foster <bfoster@redhat.com> Cc: Christoph Hellwig <hch@lst.de>, Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>, Xiong Zhou <xzhou@redhat.com>, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: mm allocation failure and hang when running xfstests generic/269 on xfs Date: Thu, 2 Mar 2017 16:47:44 +0100 [thread overview] Message-ID: <20170302154744.GN1404@dhcp22.suse.cz> (raw) In-Reply-To: <20170302153002.GG3213@bfoster.bfoster> On Thu 02-03-17 10:30:02, Brian Foster wrote: > On Thu, Mar 02, 2017 at 04:14:11PM +0100, Michal Hocko wrote: [...] > > I am not objecting to adding fatal_signal_pending as well I just thought > > that from the logic POV breaking after reaching the minimum size is just > > the right thing to do. We can optimize further by checking > > fatal_signal_pending and reducing retries when we know it doesn't make > > much sense but that should be done on top as an optimization IMHO. > > > > I don't think of it as an optimization to not invoke calls (a > non-deterministic number of times) that we know are going to fail, but the point is that vmalloc failure modes are an implementation detail which might change in the future. The fix should be really independent on the current implementation that is why I think the fatal_signal_pending is just an optimization. > ultimately I don't care too much how it's framed or if it's done in > separate patches or whatnot. As long as they are posted at the same > time. ;) Done -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-03-02 19:14 UTC|newest] Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-03-01 4:46 mm allocation failure and hang when running xfstests generic/269 on xfs Xiong Zhou 2017-03-01 4:46 ` Xiong Zhou 2017-03-02 0:37 ` Christoph Hellwig 2017-03-02 0:37 ` Christoph Hellwig 2017-03-02 5:19 ` Xiong Zhou 2017-03-02 5:19 ` Xiong Zhou 2017-03-02 6:41 ` Bob Liu 2017-03-02 6:41 ` Bob Liu 2017-03-02 6:41 ` Bob Liu 2017-03-02 6:41 ` Bob Liu 2017-03-02 6:47 ` Anshuman Khandual 2017-03-02 6:47 ` Anshuman Khandual 2017-03-02 8:42 ` Michal Hocko 2017-03-02 8:42 ` Michal Hocko 2017-03-02 9:23 ` Xiong Zhou 2017-03-02 9:23 ` Xiong Zhou 2017-03-02 10:04 ` Tetsuo Handa 2017-03-02 10:04 ` Tetsuo Handa 2017-03-02 10:35 ` Michal Hocko 2017-03-02 10:35 ` Michal Hocko 2017-03-02 10:35 ` Michal Hocko 2017-03-02 10:53 ` mm allocation failure and hang when running xfstests generic/269on xfs Tetsuo Handa 2017-03-02 10:53 ` Tetsuo Handa 2017-03-02 12:24 ` mm allocation failure and hang when running xfstests generic/269 on xfs Brian Foster 2017-03-02 12:24 ` Brian Foster 2017-03-02 12:49 ` Michal Hocko 2017-03-02 12:49 ` Michal Hocko 2017-03-02 13:00 ` Brian Foster 2017-03-02 13:00 ` Brian Foster 2017-03-02 13:07 ` Tetsuo Handa 2017-03-02 13:07 ` Tetsuo Handa 2017-03-02 13:27 ` Michal Hocko 2017-03-02 13:27 ` Michal Hocko 2017-03-02 13:41 ` Brian Foster 2017-03-02 13:41 ` Brian Foster 2017-03-02 13:50 ` Michal Hocko 2017-03-02 13:50 ` Michal Hocko 2017-03-02 14:23 ` Brian Foster 2017-03-02 14:23 ` Brian Foster 2017-03-02 14:34 ` Michal Hocko 2017-03-02 14:34 ` Michal Hocko 2017-03-02 14:51 ` Brian Foster 2017-03-02 14:51 ` Brian Foster 2017-03-02 15:14 ` Michal Hocko 2017-03-02 15:14 ` Michal Hocko 2017-03-02 15:30 ` Brian Foster 2017-03-02 15:30 ` Brian Foster 2017-03-02 15:45 ` [PATCH 1/2] xfs: allow kmem_zalloc_greedy to fail Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:45 ` [PATCH 2/2] xfs: back off from kmem_zalloc_greedy if the task is killed Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:45 ` Michal Hocko 2017-03-02 15:49 ` Christoph Hellwig 2017-03-02 15:49 ` Christoph Hellwig 2017-03-02 15:59 ` Brian Foster 2017-03-02 15:59 ` Brian Foster 2017-03-02 15:49 ` [PATCH 1/2] xfs: allow kmem_zalloc_greedy to fail Christoph Hellwig 2017-03-02 15:49 ` Christoph Hellwig 2017-03-02 15:59 ` Brian Foster 2017-03-02 15:59 ` Brian Foster 2017-03-02 16:16 ` Michal Hocko 2017-03-02 16:16 ` Michal Hocko 2017-03-02 16:44 ` Darrick J. Wong 2017-03-02 16:44 ` Darrick J. Wong 2017-03-03 22:54 ` Dave Chinner 2017-03-03 22:54 ` Dave Chinner 2017-03-03 23:19 ` Darrick J. Wong 2017-03-03 23:19 ` Darrick J. Wong 2017-03-04 4:48 ` Dave Chinner 2017-03-04 4:48 ` Dave Chinner 2017-03-06 13:21 ` Michal Hocko 2017-03-06 13:21 ` Michal Hocko 2017-03-02 15:47 ` Michal Hocko [this message] 2017-03-02 15:47 ` mm allocation failure and hang when running xfstests generic/269 on xfs Michal Hocko 2017-03-02 15:47 ` Christoph Hellwig 2017-03-02 15:47 ` Christoph Hellwig
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