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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2020-09-15 10:14:17 +0100 |
|---|---|---|
| committer |   Rodrigo Vivi <rodrigo.vivi@intel.com> | 2020-09-30 14:24:23 -0400 |
| commit | 922d369b2922b3bb8c72aadddbd7445e6dc1183a (patch) | |
| tree | 0d429a3ca1e9ed4b74901f8432c298f2b3100239 /net/unix/af_unix.c | |
| parent | drm/i915/gem: Prevent using pgprot_writecombine() if PAT is not supported (diff) | |
| download | linux-dev-922d369b2922b3bb8c72aadddbd7445e6dc1183a.tar.xz linux-dev-922d369b2922b3bb8c72aadddbd7445e6dc1183a.zip | |
drm/i915/gt: Clear the buffer pool age before use
If we create a new node, it is possible for the slab allocator to return
us a recently freed node. If that node was just retired, it will retain
the current jiffy as its node->age. There is then a miniscule window,
where as that node is retired, it will appear on the free list with an
incorrect age and be eligible for reuse by one thread, and then by a
second thread as the correct node->age is written.
Fixes: 06b73c2d0b65 ("drm/i915/gt: Delay taking the spinlock for grabbing from the buffer pool")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200915091417.4086-3-chris@chris-wilson.co.uk
(cherry picked from commit 9bb34ff25c458a2a48fb61409df42f465ede37f8)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions