I forgot to mention, this is using Ubuntu Karmic's 2.6.31 kernel, with btrfs modules built from the btrfs-unstable.git latest head.
On Nov 19, 2009, at 6:05 PM, John Dong wrote:
> While attempting to do a full filesystem defrag and checking output of df -h, I've been able to fairly consistently generate a hang:
>
>
> i.e. find / -type f -print0 | xargs -0i btrfsctl -d '{}'
>
> and in another terminal, did "watch df -h"
>
> Before long, everything hangs, iowait is near 100%, and no IO happens. I'm unable to get anything out of the kernel logs postmortem, dmesg also hangs.
>
>
> FWIW, I was mounted -o compress.--
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