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xen-blkfront: disable barrier/flush write support

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The driver doesn't handle empty flushes. Disable barrier/flush
write support until this is fixed up.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Jens Axboe 2010-10-22 10:58:33 +02:00
commit 005a1d15f5
1 changed files with 7 additions and 0 deletions
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7
drivers/block/xen-blkfront.c
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@ -1067,8 +1067,15 @@ static void blkfront_connect(struct blkfront_info *info)
* If there are barriers, then we use flush.
*/
info->feature_flush = 0;
/*
* The driver doesn't properly handled empty flushes, so
* lets disable barrier support for now.
*/
#if 0
if (!err && barrier)
info->feature_flush = REQ_FLUSH;
#endif
err = xlvbd_alloc_gendisk(sectors, info, binfo, sector_size);
if (err) {