[Qemu-devel] Re: BTRFS: Unbelievably slow with kvm/qemu

2010-07-12 Thread Giangiacomo Mariotti
On Mon, Jul 12, 2010 at 3:43 PM, Josef Bacik wrote: > > O_DIRECT support was just introduced recently, please try on the latest kernel > with the normal settings (which IIRC uses O_DIRECT), that should make things > suck alot less.  Thanks, > > Josef > With latest kernel do you mean the current Li

[Qemu-devel] Re: BTRFS: Unbelievably slow with kvm/qemu

2010-07-12 Thread Giangiacomo Mariotti
On Mon, Jul 12, 2010 at 9:09 AM, Michael Tokarev wrote: > > This looks quite similar to a problem with ext4 and O_SYNC which I > reported earlier but no one cared to answer (or read?) - there: > http://permalink.gmane.org/gmane.linux.file-systems/42758 > (sent to qemu-devel and linux-fsdevel lists

[Qemu-devel] Re: BTRFS: Unbelievably slow with kvm/qemu

2010-07-12 Thread Giangiacomo Mariotti
On Mon, Jul 12, 2010 at 9:17 AM, Justin P. Mattock wrote: > On 07/12/2010 12:09 AM, Michael Tokarev wrote: >> >> This looks quite similar to a problem with ext4 and O_SYNC which I >> reported earlier but no one cared to answer (or read?) - there: >> http://permalink.gmane.org/gmane.linux.file-syst