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btrfs: ratelimit WARN_ON in use_block_rsv
The WARN_ON under some circumstances heavily polute log and slow down the machine. This is just a safety, as the warning should be fixed by another patch, nevertheless, it still pops up during testing. Signed-off-by: David Sterba <dsterba@suse.cz>
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@ -23,6 +23,7 @@
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#include <linux/rcupdate.h>
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#include <linux/kthread.h>
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#include <linux/slab.h>
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#include <linux/ratelimit.h>
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#include "compat.h"
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#include "hash.h"
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#include "ctree.h"
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@ -5783,7 +5784,13 @@ use_block_rsv(struct btrfs_trans_handle *trans,
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if (!ret)
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return block_rsv;
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if (ret) {
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WARN_ON(1);
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static DEFINE_RATELIMIT_STATE(_rs,
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DEFAULT_RATELIMIT_INTERVAL,
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/*DEFAULT_RATELIMIT_BURST*/ 2);
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if (__ratelimit(&_rs)) {
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printk(KERN_DEBUG "btrfs: block rsv returned %d\n", ret);
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WARN_ON(1);
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}
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ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0);
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if (!ret) {
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return block_rsv;
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