Re: [PATCH 26/30] ext4: do not send discards as barriers
From: Tejun Heo <tj@kernel.org>
Date: 2010-08-31 08:11:34
Also in:
dm-devel, linux-fsdevel, linux-raid, linux-scsi, lkml
Possibly related (same subject, not in this thread)
- 2010-08-30 · Re: [PATCH 26/30] ext4: do not send discards as barriers · Jeff Moyer <hidden>
- 2010-08-27 · Re: [PATCH 26/30] ext4: do not send discards as barriers · Jan Kara <jack@suse.cz>
- 2010-08-26 · Re: [PATCH 26/30] ext4: do not send discards as barriers · Tejun Heo <tj@kernel.org>
- 2010-08-25 · Re: [PATCH 26/30] ext4: do not send discards as barriers · Jan Kara <jack@suse.cz>
- 2010-08-25 · Re: [PATCH 26/30] ext4: do not send discards as barriers · Tejun Heo <tj@kernel.org>
On 08/30/2010 10:20 PM, Jan Kara wrote:
My setup is that I have a dedicated partition / drive for a filesystem which is written to from a guest kernel running under KVM. I have set it up using virtio driver with cache=writeback so that the host caches the writes in a similar way disk caches them. At some point I just kill the qemu-kvm process and at that point I'd like to also throw away data cached by the host...
$ echo 1 > /sys/block/sdX/device/delete $ echo - - - > /sys/class/scsi_host/hostX/scan should do the trick. Thanks. -- tejun