From: Tejun Heo <tj@kernel.org>
To: Jan Kara <jack@suse.cz>
Cc: Jeff Moyer <jmoyer@redhat.com>, Christoph Hellwig <hch@lst.de>,
jaxboe@fusionio.com, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-ide@vger.kernel.org, linux-raid@vger.kernel.org,
James.Bottomley@suse.de, tytso@mit.edu, chris.mason@oracle.com,
swhiteho@redhat.com, konishi.ryusuke@lab.ntt.co.jp,
dm-devel@redhat.com, vst@vlnb.net, rwheeler@redhat.com,
hare@suse.de, neilb@suse.de, rusty@rustcorp.com.au,
mst@redhat.com, jeremy@goop.org, snitzer@redhat.com,
k-ueda@ct.jp.nec.com, Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 26/30] ext4: do not send discards as barriers
Date: Tue, 31 Aug 2010 10:11:34 +0200 [thread overview]
Message-ID: <4C7CB936.8010509@kernel.org> (raw)
In-Reply-To: <20100830202034.GB12226@quack.quadriga.com>
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
next prev parent reply other threads:[~2010-08-31 8:11 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-25 15:47 [PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with FLUSH/FUA Tejun Heo
2010-08-25 15:47 ` [PATCH 01/30] ide: remove unnecessary blk_queue_flushing() test in do_ide_request() Tejun Heo
2010-08-25 15:47 ` [PATCH 02/30] block/loop: queue ordered mode should be DRAIN_FLUSH Tejun Heo
2010-08-25 15:47 ` [PATCH 03/30] block: kill QUEUE_ORDERED_BY_TAG Tejun Heo
2010-08-25 15:47 ` [PATCH 04/30] block: deprecate barrier and replace blk_queue_ordered() with blk_queue_flush() Tejun Heo
2010-08-30 15:37 ` Boaz Harrosh
2010-08-25 15:47 ` [PATCH 05/30] block: remove spurious uses of REQ_HARDBARRIER Tejun Heo
2010-08-25 15:47 ` [PATCH 06/30] block: misc cleanups in barrier code Tejun Heo
2010-08-25 15:47 ` [PATCH 07/30] block: drop barrier ordering by queue draining Tejun Heo
2010-08-25 15:47 ` [PATCH 08/30] block: rename blk-barrier.c to blk-flush.c Tejun Heo
2010-08-25 15:47 ` [PATCH 09/30] block: rename barrier/ordered to flush Tejun Heo
2010-08-25 15:47 ` [PATCH 10/30] block: implement REQ_FLUSH/FUA based interface for FLUSH/FUA requests Tejun Heo
2010-08-25 15:47 ` [PATCH 11/30] block: filter flush bio's in __generic_make_request() Tejun Heo
2010-08-25 15:47 ` [PATCH 12/30] block: use REQ_FLUSH in blkdev_issue_flush() Tejun Heo
2010-08-25 15:47 ` [PATCH 13/30] block: simplify queue_next_fseq Tejun Heo
2010-08-25 15:47 ` [PATCH 14/30] block/loop: implement REQ_FLUSH/FUA support Tejun Heo
2010-08-25 15:47 ` [PATCH 15/30] virtio_blk: drop REQ_HARDBARRIER support Tejun Heo
2010-08-25 15:47 ` [PATCH 16/30] lguest: replace VIRTIO_F_BARRIER support with VIRTIO_F_FLUSH support Tejun Heo
2010-08-25 15:47 ` [PATCH 17/30] md: implment REQ_FLUSH/FUA support Tejun Heo
2010-08-25 15:47 ` [PATCH 18/30] block: pass gfp_mask and flags to sb_issue_discard Tejun Heo
2010-08-25 15:47 ` [PATCH 19/30] xfs: replace barriers with explicit flush / FUA usage Tejun Heo
2010-08-25 15:47 ` [PATCH 20/30] btrfs: " Tejun Heo
2010-08-25 15:47 ` [PATCH 21/30] gfs2: " Tejun Heo
2010-08-25 15:47 ` [PATCH 22/30] reiserfs: " Tejun Heo
2010-08-25 15:47 ` [PATCH 23/30] nilfs2: " Tejun Heo
2010-08-25 15:47 ` [PATCH 24/30] jbd: " Tejun Heo
2010-08-25 15:47 ` [PATCH 25/30] jbd2: " Tejun Heo
2010-08-25 15:47 ` [PATCH 26/30] ext4: do not send discards as barriers Tejun Heo
2010-08-25 15:58 ` Christoph Hellwig
2010-08-25 16:00 ` Christoph Hellwig
2010-08-25 15:57 ` Tejun Heo
2010-08-25 20:02 ` Jan Kara
2010-08-26 8:25 ` Tejun Heo
2010-08-27 17:31 ` Jan Kara
2010-08-30 19:56 ` Jeff Moyer
2010-08-30 20:20 ` Jan Kara
2010-08-30 20:24 ` Ric Wheeler
2010-08-30 20:39 ` Vladislav Bolkhovitin
2010-08-30 21:02 ` Jan Kara
2010-08-31 9:55 ` Boaz Harrosh
2010-09-02 18:46 ` Vladislav Bolkhovitin
2010-08-30 21:01 ` Jeff Moyer
2010-08-31 8:11 ` Tejun Heo [this message]
2010-08-31 10:07 ` Boaz Harrosh
2010-08-31 10:13 ` Tejun Heo
2010-08-31 10:27 ` Boaz Harrosh
2010-09-09 22:53 ` Jan Kara
2010-08-25 15:47 ` [PATCH 27/30] fat: " Tejun Heo
2010-08-25 15:47 ` [PATCH 28/30] swap: " Tejun Heo
2010-08-25 15:47 ` [PATCH 29/30] block: remove the BLKDEV_IFL_BARRIER flag Tejun Heo
2010-08-25 15:59 ` Christoph Hellwig
2010-08-25 15:47 ` [PATCH 30/30] block: remove the BH_Eopnotsupp flag Tejun Heo
2010-08-25 16:03 ` [PATCHSET 2.6.36-rc2] block, fs: replace HARDBARRIER with FLUSH/FUA Mike Snitzer
2010-08-26 8:23 ` [PATCH 24.5/30] jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier Tejun Heo
2010-08-26 9:33 ` Sergei Shtylyov
2010-08-26 9:37 ` [PATCH UPDATED " Tejun Heo
2010-09-06 11:15 ` [PATCH " Andreas Dilger
2010-09-06 11:40 ` Jan Kara
2010-08-26 9:54 ` [PATCH] block: update documentation for REQ_FLUSH / REQ_FUA Christoph Hellwig
2010-08-27 9:18 ` Tejun Heo
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