Re: bonnie triggers and endless numbers of stack traces

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On 08/19/2011 09:36 PM, Josef Bacik wrote:
On 08/19/2011 12:45 PM, Bernd Schubert wrote:
Just for performance tests I run:

./bonnie++ -d /mnt/btrfs -s0 -n 1:256:256:1 -r 0

and this causes and endless number of stack traces. Those seem to
come from:

use_block_rsv()

	ret = block_rsv_use_bytes(block_rsv, blocksize);
	if (!ret)
		return block_rsv;
	if (ret) {
		WARN_ON(1);
		ret = reserve_metadata_bytes(trans, root, block_rsv, blocksize,


Why is there a WARN_ON(1)? Running the bonnie benchmark is basically impossible
that.

This is being worked on, if you really don't like it pull my git tree
and test it out and see if the errors go away

git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work.git

Do you plan to fix it for 3.1? If not, any chance to at least update it to WARN_ON_ONCE?


Thanks,
Bernd
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