On 08/09/2011 05:29 PM, Andrew Guertin wrote: > On 06/21/2011 01:15 PM, Jan Stilow wrote: >> Hello, >> >> Nirbheek Chauhan <nirbheek <at> gentoo.org> writes: >>> [...] >>> >>> Every few minutes, (I guess) when applications do fsync (firefox, >>> xchat, vim, etc), all applications that use fsync() hang for several >>> seconds, and applications that use general IO suffer extreme >>> slowdowns. iotop shows various combinations of the processes listed >>> below doing writes, and the total write as 2-3MB/s. >>> >>> [btrfs-dealloc-] >>> [btrfs-submit-0] >>> [btrfs-transacti] >>> [btrfs-endio-wri] >>> [flush-btrfs-1] >> >> I'm using btrfs under a 2.6.39-ARCH kernel and run into the same issue. >> >> In my case the [btrfs-submit-0] and [btrfs-transacti] shows up in iotop >> and produce 99% of IO at the time a application is frozen. For something >> like 10 to 30 seconds. >> >> [...] > > I see the same issue. I have bisected it to > > 4e69b598f6cfb0940b75abf7e179d6020e94ad1e is the first bad commit > commit 4e69b598f6cfb0940b75abf7e179d6020e94ad1e > Author: Josef Bacik <josef@xxxxxxxxxx> > Date: Mon Mar 21 10:11:24 2011 -0400 > > Btrfs: cleanup how we setup free space clusters > > ...which came in between 2.6.38 and 2.6.39. Any chance of someone looking at this? I (and presumably others) haven't been able to upgrade my kernel past 2.6.38 because of this. --Andrew -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
