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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>
This commit is contained in:
David Sterba 2011-06-14 12:52:17 +02:00
parent a81d3b1ba2
commit dff51cd1c6
1 changed files with 8 additions and 1 deletions
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9
fs/btrfs/extent-tree.c
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@ -23,6 +23,7 @@
#include <linux/rcupdate.h> #include <linux/rcupdate.h>
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/ratelimit.h>
#include "compat.h" #include "compat.h"
#include "hash.h" #include "hash.h"
#include "ctree.h" #include "ctree.h"
@ -5783,7 +5784,13 @@ use_block_rsv(struct btrfs_trans_handle *trans,
if (!ret) if (!ret)
return block_rsv; return block_rsv;
if (ret) { if (ret) {
WARN_ON(1); static DEFINE_RATELIMIT_STATE(_rs,
DEFAULT_RATELIMIT_INTERVAL,
/*DEFAULT_RATELIMIT_BURST*/ 2);
if (__ratelimit(&_rs)) {
printk(KERN_DEBUG "btrfs: block rsv returned %d\n", ret);
WARN_ON(1);
}
ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0); ret = reserve_metadata_bytes(root, block_rsv, blocksize, 0);
if (!ret) { if (!ret) {
return block_rsv; return block_rsv;