Jeremy Fitzhardinge
2010-Nov-11 23:20 UTC
[Xen-devel] [GIT PULL] xen blkfront barrier updates
Hi Jens,
Here''s the xen-blkfront barrier changes we discussed in Boston (its
identical to the last posted version).
The only comment was Christoph pointing out EOPNOTSUPP is not used in
the block interface, but blkfront is just using it as a local
placeholder and it never gets returned up to the block layer.
I still haven''t sorted out what''s going on with the backends;
we
definitely need either a FLUSH operation or make empty WRITE_BARRIER
work to flush disk caches.
Thanks,
J
The following changes since commit c8ddb2713c624f432fa5fe3c7ecffcdda46ea0d4:
Linux 2.6.37-rc1 (2010-11-01 07:54:12 -0400)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git upstream/blkfront
Jeremy Fitzhardinge (4):
xen/blkfront: map REQ_FLUSH into a full barrier
xen/blkfront: change blk_shadow.request to proper pointer
xen/blkfront: Implement FUA with BLKIF_OP_WRITE_BARRIER
xen/blkfront: cope with backend that fail empty BLKIF_OP_WRITE_BARRIER
requests
drivers/block/xen-blkfront.c | 55 ++++++++++++++++++++++++-----------------
1 files changed, 32 insertions(+), 23 deletions(-)
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On 2010-11-12 00:20, Jeremy Fitzhardinge wrote:> Hi Jens, > > Here''s the xen-blkfront barrier changes we discussed in Boston (its > identical to the last posted version). > > The only comment was Christoph pointing out EOPNOTSUPP is not used in > the block interface, but blkfront is just using it as a local > placeholder and it never gets returned up to the block layer. > > I still haven''t sorted out what''s going on with the backends; we > definitely need either a FLUSH operation or make empty WRITE_BARRIER > work to flush disk caches.Thanks Jeremy, I''ll pull this in. -- Jens Axboe _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel