From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: jaxboe@fusionio.com, jbottomley@parallels.com
Cc: linux-scsi@vger.kernel.org
Subject: Write same support v4
Date: Fri, 16 Mar 2012 14:43:12 -0400 [thread overview]
Message-ID: <1331923399-30987-1-git-send-email-martin.petersen@oracle.com> (raw)
Changes since v3:
- Document that the REQ_NOMERGE_FLAGS is used for both bio and request
merging.
- Do size accounting correctly so we don't have to use
blk_add_request_payload(). This also fixes an issue discovered by
Mike: When running over a flaky iSCSI connection we would end up
completing one block and subsequently fail trying to redrive the
remainder of the I/O. An unfortunate side effect of the discrepancy
between the DMA transfer size and the logical block range affected by
the command.
I put a writesame4 branch on:
git://git.kernel.org/pub/scm/linux/kernel/git/mkp/linux.git
--
Martin K. Petersen Oracle Linux Engineering
next reply other threads:[~2012-03-16 18:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-16 18:43 Martin K. Petersen [this message]
2012-03-16 18:43 ` [PATCH 1/7] block: Clean up discard handling logic Martin K. Petersen
2012-03-16 18:43 ` [PATCH 2/7] block: Implement support for WRITE SAME Martin K. Petersen
2012-03-16 18:43 ` [PATCH 3/7] block: Make blkdev_issue_zeroout use " Martin K. Petersen
2012-03-16 18:43 ` [PATCH 4/7] block: ioctl to zero block ranges Martin K. Petersen
2012-03-16 18:43 ` [PATCH 5/7] scsi: Add a report opcode helper Martin K. Petersen
2012-03-16 18:43 ` [PATCH 6/7] sd: Implement support for WRITE SAME Martin K. Petersen
2012-03-16 18:43 ` [PATCH 7/7] sd: Use sd_ prefix for flush and discard functions Martin K. Petersen
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