diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-11-21 10:01:51 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-11-21 12:03:40 +0100 |
| commit | 46f4f0aabc61bfd365e1eb3c8a6d766d1a49cf32 (patch) | |
| tree | f98a256ff3e4b20ca6252f7f80ce17759e57c6f2 /lib/dump_stack.c | |
| parent | 14edff88315add29099fd8eebb9ef989c2e47c18 (diff) | |
| parent | b07a5c53d42a8c87b208614129e947dd2338ff9c (diff) | |
| download | talos-op-linux-46f4f0aabc61bfd365e1eb3c8a6d766d1a49cf32.tar.gz talos-op-linux-46f4f0aabc61bfd365e1eb3c8a6d766d1a49cf32.zip | |
Merge branch 'kvm-tsx-ctrl' into HEAD
Conflicts:
arch/x86/kvm/vmx/vmx.c
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; } |
