Re: kernel BUG at fs/btrfs/delayed-inode.c:1466!

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2012/3/10 Jacek Luczak <difrost.kernel@xxxxxxxxx>:
> 2) A *regression* in 3.3.0-rc6-00197-g9f8050c
> - completely unusable as reports ENOSPC
> - to reproduce, mount volume and issue:
> # CNT=1 ; while [ $CNT -lt 10000 ] ; do  rm -f /btrfs/dd ; ! touch
> /btrfs/dd && echo "$CNT" && break  ; CNT=$(( $CNT + 1 )) ; done
> On my host this shows:
> # CNT=1 ; while [ $CNT -lt 10000 ] ; do  rm -f /btrfs/dd ; ! touch
> /btrfs/dd && echo "$CNT" && break  ; CNT=$(( $CNT + 1 )) ; done
> touch: cannot touch `/btrfs/dd': No space left on device
> 423
> - remount to reset:
> # CNT=1 ; while [ $CNT -lt 10000 ] ; do  rm -f /btrfs/dd ; ! touch
> /btrfs/dd && echo "$CNT" && break  ; CNT=$(( $CNT + 1 )) ; done
> touch: cannot touch `/btrfs/dd': No space left on device
> 1
> # umount /btrfs/
> # mount -t btrfs /dev/vg00/btrfs /btrfs/ -o noatime,nodatacow,defaults
> # CNT=1 ; while [ $CNT -lt 10000 ] ; do  rm -f /btrfs/dd ; ! touch
> /vdd && echo "$CNT" && break  ; CNT=$(( $CNT + 1 )) ; done
> touch: cannot touch `/btrfs/dd': No space left on device
> 423
> - bisected down to 5500cdb (Btrfs: increase the global block reserve
> estimates). After reverting this one Linus master works for me again.

This patch is included in 3.3-rc7. Do you plan to keep it or revert?

-jacek
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