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| author | Nikolay Borisov <[email protected]> | 2018-04-05 07:40:15 +0000 |
|---|---|---|
| committer | David Sterba <[email protected]> | 2018-04-05 17:22:35 +0000 |
| commit | 1e1c50a929bc9e49bc3f9935b92450d9e69f8158 (patch) | |
| tree | 1e950e1030b25534acc205832c6eae3b05aee1b4 /fs/btrfs/print-tree.c | |
| parent | Btrfs: bail out on error during replay_dir_deletes (diff) | |
| download | kernel-1e1c50a929bc9e49bc3f9935b92450d9e69f8158.tar.gz kernel-1e1c50a929bc9e49bc3f9935b92450d9e69f8158.zip | |
btrfs: Fix possible softlock on single core machines
do_chunk_alloc implements a loop checking whether there is a pending
chunk allocation and if so causes the caller do loop. Generally this
loop is executed only once, however testing with btrfs/072 on a single
core vm machines uncovered an extreme case where the system could loop
indefinitely. This is due to a missing cond_resched when loop which
doesn't give a chance to the previous chunk allocator finish its job.
The fix is to simply add the missing cond_resched.
Fixes: 6d74119f1a3e ("Btrfs: avoid taking the chunk_mutex in do_chunk_alloc")
Signed-off-by: Nikolay Borisov <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>
Diffstat (limited to 'fs/btrfs/print-tree.c')
0 files changed, 0 insertions, 0 deletions