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btrfs: make find_workspace warn if there are no workspaces
Be verbose if there are no workspaces at all, ie. the module init time preallocation failed. Signed-off-by: David Sterba <dsterba@suse.com>
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1 changed files with 14 additions and 0 deletions
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@ -834,7 +834,21 @@ static struct list_head *find_workspace(int type)
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* workspace preallocated for each type and the compression
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* time is bounded so we get to a workspace eventually. This
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* makes our caller's life easier.
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*
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* To prevent silent and low-probability deadlocks (when the
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* initial preallocation fails), check if there are any
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* workspaces at all.
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*/
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if (atomic_read(total_ws) == 0) {
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static DEFINE_RATELIMIT_STATE(_rs,
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/* once per minute */ 60 * HZ,
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/* no burst */ 1);
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if (__ratelimit(&_rs)) {
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printk(KERN_WARNING
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"no compression workspaces, low memory, retrying");
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}
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}
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goto again;
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}
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return workspace;
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