On 04/01/2014 07:22 AM, Guangliang Zhao wrote:
This patch add the discard support for rbd driver.
There are three types operation in the driver:
1. The objects would be removed if they completely contained
within the discard range.
2. The objects would be truncated if they partly contained within
the discard range, and align with their boundary.
3. Others would be zeroed.
A discard request from blkdev_issue_discard() is defined which
REQ_WRITE and REQ_DISCARD both marked and no data, so we must
check the REQ_DISCARD first when getting the request type.
This resolve:
http://tracker.ceph.com/issues/190
Signed-off-by: Guangliang Zhao <lucienchao@xxxxxxxxx>
---
Thanks for fixing these up! I've added them to the wip-discard branch
in ceph-client.git, which I'll post for review shortly.
Josh
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