From: Michal Hocko <mhocko@kernel.org> To: Davidlohr Bueso <dave@stgolabs.net> Cc: LKML <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, Alex Deucher <alexander.deucher@amd.com>, Alex Thorlton <athorlton@sgi.com>, Andrea Arcangeli <aarcange@redhat.com>, Andy Lutomirski <luto@amacapital.net>, Benjamin LaHaise <bcrl@kvack.org>, Christian K?nig <christian.koenig@amd.com>, Daniel Vetter <daniel.vetter@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, David Airlie <airlied@linux.ie>, David Rientjes <rientjes@google.com>, "H . Peter Anvin" <hpa@zytor.com>, Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Konstantin Khlebnikov <koct9i@gmail.com>, linux-arch@vger.kernel.org, Mel Gorman <mgorman@suse.de>, Oleg Nesterov <oleg@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Petr Cermak <petrce> Subject: Re: [PATCH 09/18] ipc, shm: make shmem attach/detach wait for mmap_sem killable Date: Wed, 9 Mar 2016 11:16:52 +0100 [thread overview] Message-ID: <20160309101651.GE27018@dhcp22.suse.cz> (raw) In-Reply-To: <20160308191550.GA4404@linux-uzut.site> On Tue 08-03-16 11:15:50, Davidlohr Bueso wrote: > On Mon, 29 Feb 2016, Michal Hocko wrote: > > >From: Michal Hocko <mhocko@suse.com> > > > >shmat and shmdt rely on mmap_sem for write. If the waiting task > >gets killed by the oom killer it would block oom_reaper from > >asynchronous address space reclaim and reduce the chances of timely > >OOM resolving. Wait for the lock in the killable mode and return with > >EINTR if the task got killed while waiting. > > > >Cc: Davidlohr Bueso <dave@stgolabs.net> > >Cc: Hugh Dickins <hughd@google.com> > >Signed-off-by: Michal Hocko <mhocko@suse.com> > > I have no objection to this perse, just one comment below. > > Acked-by: Davidlohr Bueso <dave@stgolabs.net> Thanks! [...] > >- down_write(¤t->mm->mmap_sem); > >+ if (down_write_killable(¤t->mm->mmap_sem)) { > >+ err = -EINVAL; > >+ goto out_fput; > >+ } > > This should be EINTR, no? Of course. Thanks for catching that. -- Michal Hocko SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Davidlohr Bueso <dave@stgolabs.net> Cc: LKML <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, Alex Deucher <alexander.deucher@amd.com>, Alex Thorlton <athorlton@sgi.com>, Andrea Arcangeli <aarcange@redhat.com>, Andy Lutomirski <luto@amacapital.net>, Benjamin LaHaise <bcrl@kvack.org>, Christian K?nig <christian.koenig@amd.com>, Daniel Vetter <daniel.vetter@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, David Airlie <airlied@linux.ie>, David Rientjes <rientjes@google.com>, "H . Peter Anvin" <hpa@zytor.com>, Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Konstantin Khlebnikov <koct9i@gmail.com>, linux-arch@vger.kernel.org, Mel Gorman <mgorman@suse.de>, Oleg Nesterov <oleg@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Petr Cermak <petrcermak@chromium.org>, Thomas Gleixner <tglx@linutronix.de> Subject: Re: [PATCH 09/18] ipc, shm: make shmem attach/detach wait for mmap_sem killable Date: Wed, 9 Mar 2016 11:16:52 +0100 [thread overview] Message-ID: <20160309101651.GE27018@dhcp22.suse.cz> (raw) Message-ID: <20160309101652.h50KoEeAh47HkL_NA15_8F-2M376xXFzn6l2EK26VtA@z> (raw) In-Reply-To: <20160308191550.GA4404@linux-uzut.site> On Tue 08-03-16 11:15:50, Davidlohr Bueso wrote: > On Mon, 29 Feb 2016, Michal Hocko wrote: > > >From: Michal Hocko <mhocko@suse.com> > > > >shmat and shmdt rely on mmap_sem for write. If the waiting task > >gets killed by the oom killer it would block oom_reaper from > >asynchronous address space reclaim and reduce the chances of timely > >OOM resolving. Wait for the lock in the killable mode and return with > >EINTR if the task got killed while waiting. > > > >Cc: Davidlohr Bueso <dave@stgolabs.net> > >Cc: Hugh Dickins <hughd@google.com> > >Signed-off-by: Michal Hocko <mhocko@suse.com> > > I have no objection to this perse, just one comment below. > > Acked-by: Davidlohr Bueso <dave@stgolabs.net> Thanks! [...] > >- down_write(¤t->mm->mmap_sem); > >+ if (down_write_killable(¤t->mm->mmap_sem)) { > >+ err = -EINVAL; > >+ goto out_fput; > >+ } > > This should be EINTR, no? Of course. Thanks for catching that. -- Michal Hocko SUSE Labs
next prev parent reply other threads:[~2016-03-09 10:16 UTC|newest] Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-02-29 13:26 [PATCH 0/18] change mmap_sem taken for write killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 01/18] mm: Make mmap_sem for write waits killable for mm syscalls Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:44 ` kbuild test robot 2016-02-29 13:44 ` kbuild test robot 2016-02-29 13:44 ` kbuild test robot 2016-02-29 13:44 ` kbuild test robot 2016-03-10 15:47 ` Vlastimil Babka 2016-03-10 15:47 ` Vlastimil Babka 2016-03-10 15:56 ` Michal Hocko 2016-03-10 15:56 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 02/18] mm: make vm_mmap killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 9:59 ` Vlastimil Babka 2016-03-11 9:59 ` Vlastimil Babka 2016-03-11 12:12 ` Michal Hocko 2016-03-11 12:12 ` Michal Hocko 2016-03-11 12:43 ` Vlastimil Babka 2016-03-11 12:43 ` Vlastimil Babka 2016-03-11 12:55 ` Michal Hocko 2016-03-11 12:55 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 03/18] mm: make vm_munmap killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 10:06 ` Vlastimil Babka 2016-03-11 10:06 ` Vlastimil Babka 2016-03-11 12:32 ` Michal Hocko 2016-03-11 12:32 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 04/18] mm, aout: handle vm_brk failures Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 10:32 ` Vlastimil Babka 2016-03-11 10:32 ` Vlastimil Babka 2016-03-11 12:42 ` Michal Hocko 2016-03-11 12:42 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 05/18] mm, elf: handle vm_brk error Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 10:35 ` Vlastimil Babka 2016-03-11 10:35 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 06/18] mm: make vm_brk killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 10:44 ` Vlastimil Babka 2016-03-11 10:44 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 07/18] mm, proc: make clear_refs killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:47 ` kbuild test robot 2016-02-29 13:47 ` kbuild test robot 2016-02-29 17:38 ` Oleg Nesterov 2016-02-29 17:38 ` Oleg Nesterov 2016-02-29 17:53 ` Michal Hocko 2016-02-29 17:53 ` Michal Hocko 2016-02-29 17:58 ` Oleg Nesterov 2016-02-29 17:58 ` Oleg Nesterov 2016-02-29 18:02 ` Michal Hocko 2016-02-29 18:02 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 08/18] mm, fork: make dup_mmap wait for mmap_sem for write killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:48 ` kbuild test robot 2016-02-29 13:48 ` kbuild test robot 2016-02-29 17:54 ` Oleg Nesterov 2016-02-29 17:54 ` Oleg Nesterov 2016-02-29 13:26 ` [PATCH 09/18] ipc, shm: make shmem attach/detach wait for mmap_sem killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-08 19:15 ` Davidlohr Bueso 2016-03-08 19:15 ` Davidlohr Bueso 2016-03-09 10:16 ` Michal Hocko [this message] 2016-03-09 10:16 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 10/18] vdso: make arch_setup_additional_pages wait for mmap_sem for write killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:45 ` kbuild test robot 2016-02-29 13:45 ` kbuild test robot 2016-02-29 13:50 ` kbuild test robot 2016-02-29 13:50 ` kbuild test robot 2016-02-29 13:53 ` kbuild test robot 2016-02-29 13:53 ` kbuild test robot 2016-02-29 15:41 ` Andy Lutomirski 2016-02-29 15:41 ` Andy Lutomirski 2016-03-11 11:28 ` Vlastimil Babka 2016-03-11 11:28 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 11/18] coredump: make coredump_wait wait for mma_sem " Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 15:57 ` Oleg Nesterov 2016-02-29 15:57 ` Oleg Nesterov 2016-03-11 11:32 ` Vlastimil Babka 2016-03-11 11:32 ` Vlastimil Babka 2016-03-11 11:54 ` Vlastimil Babka 2016-03-11 11:54 ` Vlastimil Babka 2016-03-11 12:46 ` Michal Hocko 2016-03-11 12:46 ` Michal Hocko 2016-02-29 13:26 ` [PATCH 12/18] aio: make aio_setup_ring killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 16:17 ` Jeff Moyer 2016-02-29 16:17 ` Jeff Moyer 2016-03-11 11:57 ` Vlastimil Babka 2016-03-11 11:57 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 13/18] exec: make exec path waiting for mmap_sem killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 17:23 ` Oleg Nesterov 2016-02-29 17:23 ` Oleg Nesterov 2016-02-29 17:47 ` Michal Hocko 2016-02-29 17:47 ` Michal Hocko 2016-02-29 18:10 ` Oleg Nesterov 2016-02-29 18:10 ` Oleg Nesterov 2016-03-11 12:51 ` Vlastimil Babka 2016-03-11 12:51 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 14/18] prctl: make PR_SET_THP_DISABLE wait " Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 12:54 ` Vlastimil Babka 2016-03-11 12:54 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 15/18] uprobes: wait for mmap_sem for write killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 15:57 ` Oleg Nesterov 2016-02-29 15:57 ` Oleg Nesterov 2016-02-29 16:28 ` Michal Hocko 2016-02-29 16:28 ` Michal Hocko 2016-02-29 17:12 ` Oleg Nesterov 2016-02-29 17:12 ` Oleg Nesterov 2016-02-29 13:26 ` [PATCH 16/18] drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 15:23 ` Vlastimil Babka 2016-03-11 15:23 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 17/18] drm/radeon: make radeon_mn_get " Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-02-29 13:35 ` Christian König 2016-02-29 13:35 ` Christian König 2016-03-11 15:27 ` Vlastimil Babka 2016-03-11 15:27 ` Vlastimil Babka 2016-02-29 13:26 ` [PATCH 18/18] drm/amdgpu: make amdgpu_mn_get " Michal Hocko 2016-02-29 13:26 ` Michal Hocko 2016-03-11 15:29 ` Vlastimil Babka 2016-03-11 15:29 ` Vlastimil Babka 2016-02-29 13:31 ` [PATCH 0/18] change mmap_sem taken for write killable Michal Hocko 2016-02-29 13:31 ` Michal Hocko 2016-02-29 14:04 ` Kirill A. Shutemov 2016-02-29 14:04 ` Kirill A. Shutemov 2016-02-29 14:16 ` Michal Hocko 2016-02-29 14:16 ` Michal Hocko 2016-02-29 15:03 ` Kirill A. Shutemov 2016-02-29 15:03 ` Kirill A. Shutemov
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