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| author | Alexander Aring <aahringo@redhat.com> | 2020-10-26 10:52:29 -0400 |
|---|---|---|
| committer | Andreas Gruenbacher <agruenba@redhat.com> | 2020-11-03 14:39:11 +0100 |
| commit | da7d554f7c62d0c17c1ac3cc2586473c2d99f0bd (patch) | |
| tree | c9f4f8c199ef7335fff49ed0ca929040e945915c | |
| parent | 6bd1c7bd4ee7b17980cdc347522dcb76feac9b98 (diff) | |
| download | linux-riscv-da7d554f7c62d0c17c1ac3cc2586473c2d99f0bd.tar.gz linux-riscv-da7d554f7c62d0c17c1ac3cc2586473c2d99f0bd.tar.bz2 linux-riscv-da7d554f7c62d0c17c1ac3cc2586473c2d99f0bd.zip | |
gfs2: Wake up when sd_glock_disposal becomes zero
Commit fc0e38dae645 ("GFS2: Fix glock deallocation race") fixed a
sd_glock_disposal accounting bug by adding a missing atomic_dec
statement, but it failed to wake up sd_glock_wait when that decrement
causes sd_glock_disposal to reach zero. As a consequence,
gfs2_gl_hash_clear can now run into a 10-minute timeout instead of
being woken up. Add the missing wakeup.
Fixes: fc0e38dae645 ("GFS2: Fix glock deallocation race")
Cc: stable@vger.kernel.org # v2.6.39+
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
| -rw-r--r-- | fs/gfs2/glock.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 5441c17562c5..d98a2e5dab9f 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1078,7 +1078,8 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, out_free: kfree(gl->gl_lksb.sb_lvbptr); kmem_cache_free(cachep, gl); - atomic_dec(&sdp->sd_glock_disposal); + if (atomic_dec_and_test(&sdp->sd_glock_disposal)) + wake_up(&sdp->sd_glock_wait); out: return ret; |