2012/3/9 David Sterba <d...@jikos.cz>: > On Fri, Mar 09, 2012 at 12:08:12PM +0100, Jacek Luczak wrote: >> For this one I've created also a report [1]. >> > >> > so there is probably other problem in reservations and it just blew up >> > during >> > the unlink call. >> >> Could be as this came up after a longer time of throwing above WARN_ON. >> >> I'm now cloning the Linus tree. Lets see if both will pop up on there. > > The 3.3-rc6 should help in one case, with > > http://thread.gmane.org/gmane.comp.file-systems.btrfs/15268 > > but I was able to reproduce the WARN_ON even with this patch, didn't get > to debugging it again yet. >
The story so far looks like this: 1) kernel 3.2.7: - on the BUG_ON triggers after a longer while of CI env (doing builds) running. This has been already reproduced twice. - WARN_ON spams heavily, even after BUG_ON pop up. - possible relation between WARN_ON and BUG_ON. 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. -Jacek -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html