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From: Michal Hocko <mhocko@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: "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 König" <christian.koenig@amd.com>,
	"Daniel Vetter" <daniel.vetter@intel.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"David Airlie" <airlied@linux.ie>,
	"Davidlohr Bueso" <dave@stgolabs.net>,
	"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>,
	"Michal Hocko" <mhocko@suse.com>
Subject: [PATCH 17/18] drm/radeon: make radeon_mn_get wait for mmap_sem killable
Date: Mon, 29 Feb 2016 14:26:56 +0100	[thread overview]
Message-ID: <1456752417-9626-18-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1456752417-9626-1-git-send-email-mhocko@kernel.org>

From: Michal Hocko <mhocko@suse.com>

radeon_mn_get which is called during ioct path relies 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: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian KA?nig" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Signed-off-by: Michal Hocko <mhocko@suse.com>
---
 drivers/gpu/drm/radeon/radeon_mn.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c
index eef006c48584..896f2cf51e4e 100644
--- a/drivers/gpu/drm/radeon/radeon_mn.c
+++ b/drivers/gpu/drm/radeon/radeon_mn.c
@@ -186,7 +186,9 @@ static struct radeon_mn *radeon_mn_get(struct radeon_device *rdev)
 	struct radeon_mn *rmn;
 	int r;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return ERR_PTR(-EINTR);
+
 	mutex_lock(&rdev->mn_lock);
 
 	hash_for_each_possible(rdev->mn_hash, rmn, node, (unsigned long)mm)
-- 
2.7.0

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  parent reply	other threads:[~2016-02-29 13:27 UTC|newest]

Thread overview: 88+ 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 ` [PATCH 01/18] mm: Make mmap_sem for write waits killable for mm syscalls Michal Hocko
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 15:56     ` Michal Hocko
2016-02-29 13:26 ` [PATCH 02/18] mm: make vm_mmap killable Michal Hocko
2016-03-11  9:59   ` Vlastimil Babka
2016-03-11 12:12     ` Michal Hocko
2016-03-11 12:43       ` Vlastimil Babka
2016-03-11 12:55         ` Michal Hocko
2016-02-29 13:26 ` [PATCH 03/18] mm: make vm_munmap killable Michal Hocko
2016-03-11 10:06   ` Vlastimil Babka
2016-03-11 12:32     ` Michal Hocko
2016-02-29 13:26 ` [PATCH 04/18] mm, aout: handle vm_brk failures Michal Hocko
2016-03-11 10:32   ` Vlastimil Babka
2016-03-11 12:42     ` Michal Hocko
2016-02-29 13:26 ` [PATCH 05/18] mm, elf: handle vm_brk error Michal Hocko
2016-03-11 10:35   ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 06/18] mm: make vm_brk killable Michal Hocko
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 13:47   ` kbuild test robot
2016-02-29 17:38   ` Oleg Nesterov
2016-02-29 17:53     ` Michal Hocko
2016-02-29 17:58       ` Oleg Nesterov
2016-02-29 18:02         ` Michal Hocko
2016-02-29 17:56   ` [PATCH] " Michal Hocko
2016-02-29 18:16     ` Oleg Nesterov
2016-02-29 20:25     ` kbuild test robot
2016-03-11 10:59     ` Vlastimil Babka
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 13:48   ` kbuild test robot
2016-02-29 17:54   ` Oleg Nesterov
2016-02-29 18:07   ` [PATCH] " Michal Hocko
2016-02-29 20:13     ` kbuild test robot
2016-03-11 11:12     ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 09/18] ipc, shm: make shmem attach/detach wait for mmap_sem killable Michal Hocko
2016-03-08 19:15   ` Davidlohr Bueso
2016-03-09 10:16     ` Michal Hocko
2016-03-09 10:19   ` [PATCH] " Michal Hocko
2016-03-09 10:46     ` kbuild test robot
2016-03-11 11:18     ` Vlastimil Babka
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 13:45   ` kbuild test robot
2016-02-29 13:50   ` kbuild test robot
2016-02-29 13:53   ` kbuild test robot
2016-02-29 15:41   ` Andy Lutomirski
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 15:57   ` Oleg Nesterov
2016-03-11 11:32   ` Vlastimil Babka
2016-03-11 11:54     ` Vlastimil Babka
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 16:17   ` Jeff Moyer
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 17:23   ` Oleg Nesterov
2016-02-29 17:47     ` Michal Hocko
2016-02-29 18:10       ` Oleg Nesterov
2016-03-11 12:51   ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 14/18] prctl: make PR_SET_THP_DISABLE wait " Michal Hocko
2016-03-11 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 15:57   ` Oleg Nesterov
2016-02-29 16:28     ` Michal Hocko
2016-02-29 17:12       ` Oleg Nesterov
2016-02-29 17:42   ` [PATCH] " Michal Hocko
2016-02-29 17:52     ` kbuild test robot
2016-02-29 17:53     ` kbuild test robot
2016-02-29 18:11     ` Oleg Nesterov
2016-02-29 18:22       ` Michal Hocko
2016-02-29 18:38         ` Oleg Nesterov
2016-03-11 14:58     ` Vlastimil Babka
2016-03-11 15:32       ` Michal Hocko
2016-02-29 13:26 ` [PATCH 16/18] drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable Michal Hocko
2016-03-11 15:23   ` Vlastimil Babka
2016-02-29 13:26 ` Michal Hocko [this message]
2016-02-29 13:35   ` [PATCH 17/18] drm/radeon: make radeon_mn_get " Christian König
2016-03-11 15:27   ` Vlastimil Babka
2016-02-29 13:26 ` [PATCH 18/18] drm/amdgpu: make amdgpu_mn_get " Michal Hocko
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 14:04 ` Kirill A. Shutemov
2016-02-29 14:16   ` Michal Hocko
2016-02-29 15:03     ` Kirill A. Shutemov
2016-04-26 12:56 [PATCH 0/18] change mmap_sem taken for write killable v2 Michal Hocko
2016-04-26 12:56 ` [PATCH 17/18] drm/radeon: make radeon_mn_get wait for mmap_sem killable Michal Hocko

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