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| author | Ingo Molnar <mingo@kernel.org> | 2019-11-11 07:59:06 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-11-11 07:59:06 +0100 |
| commit | 1ca7feb59087a3d1a4ef79e09c42eca5c2e7fa38 (patch) | |
| tree | 548d3518b41341b93c88ee4ff5661e1eb42bd7f4 /lib/dump_stack.c | |
| parent | d44f821b0e13275735e8f3fe4db8703b45f05d52 (diff) | |
| parent | 31f4f5b495a62c9a8b15b1c3581acd5efeb9af8c (diff) | |
| download | linux-next-1ca7feb59087a3d1a4ef79e09c42eca5c2e7fa38.tar.gz linux-next-1ca7feb59087a3d1a4ef79e09c42eca5c2e7fa38.zip | |
Merge tag 'v5.4-rc7' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/dump_stack.c')
| -rw-r--r-- | lib/dump_stack.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/dump_stack.c b/lib/dump_stack.c index 5cff72f18c4a..33ffbf308853 100644 --- a/lib/dump_stack.c +++ b/lib/dump_stack.c @@ -106,7 +106,12 @@ retry: was_locked = 1; } else { local_irq_restore(flags); - cpu_relax(); + /* + * Wait for the lock to release before jumping to + * atomic_cmpxchg() in order to mitigate the thundering herd + * problem. + */ + do { cpu_relax(); } while (atomic_read(&dump_lock) != -1); goto retry; } |