Re: Rename BTRfs to MuchSlowerFS ?

2011-09-08 Thread youagree
On 09/05/2011 06:29 PM, Hugo Mills wrote: > On Mon, Sep 05, 2011 at 12:25:21PM -0400, Christoph Hellwig wrote: >> On Mon, Sep 05, 2011 at 06:23:23PM +0200, Tomasz Chmielewski wrote: That's because dpkg is known for using (f)sync very heavily. btrfs honours the sync request in all cases

Re: Applications using fsync cause hangs for several seconds every few minutes

2011-08-18 Thread youagree
On 08/18/2011 09:29 AM, Andrew Guertin wrote: > * Many processes occasionally hang for a short time > * When this happens, my cpu monitor shows a short burst of cpu activity > (100% of 1 core) followed by a longer period of IO > * When this happens, iotop shows [btrfs-submit-0] and [btrfs-transacti

Re: Applications using fsync cause hangs for several seconds every few minutes

2011-08-17 Thread youagree
Are these processes principally btrfs-submit and btrfs-transacti in particular? Then it may be related to my very similar issue reported earlier. On 08/18/2011 08:47 AM, Chris Samuel wrote: > On 18/08/11 00:29, Michael Cronenworth wrote: > >> I'm running kernel 3.0 (Fedora 15's 2.6.40) on two b

Re: Applications using fsync cause hangs for several seconds every few minutes

2011-08-17 Thread youagree
This is most probably related to the same regression seen after 2.6.38, my blocked comment on 3 August included an indication to that the behavior was present in my distro 2.6.38 kernel too, it just was appearing after a considerably longer uptime (on my desktop system using btrfs as rootfs on an I