Re: Poor interactive performance with I/O loads with fsync()ing

2010-04-11 Thread Ben Gamari
On Sun, 11 Apr 2010 18:03:00 +0300, Avi Kivity a...@redhat.com wrote: On 04/09/2010 05:56 PM, Ben Gamari wrote: On Mon, 29 Mar 2010 00:08:58 +0200, Andi Kleena...@firstfloor.org wrote: Ben Gamaribgamari.f...@gmail.com writes: ext4/XFS/JFS/btrfs should be better in this regard

Re: Poor interactive performance with I/O loads with fsync()ing

2010-04-11 Thread Andi Kleen
Has the reason for this been identified? Judging from the nature of metadata loads, it would seem that it should be substantially easier to implement fsync() efficiently. By design a copy on write tree fs would need to flush a whole tree hierarchy on a sync. btrfs avoids this by using a

Re: Can't mount removable device if device name changes.

2010-04-11 Thread TARUISI Hiroaki
Hi, What is your kernel version? Btrfs hols device names which construct filesystems and updating device name(device renaming) is merged just in last month. Regards, taruisi (2010/04/11 10:49), cwillu wrote: I've got a btrfs on an sd card, which I'm using as the root fs on a beagle. That's