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| author | Joe Thornber <ejt@redhat.com> | 2012-03-28 21:41:28 +0400 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-03-28 21:41:28 +0400 |
| commit | eb2aa48d4eb7aee63cba201bf47641dad3e92250 (patch) | |
| tree | 3e160010319f6c4eb30770d07d6fb089955f5704 /Documentation/device-mapper/thin-provisioning.txt | |
| parent | 6efd6e83092cd4a7532270bc843de90bb93f6683 (diff) | |
| download | linux-eb2aa48d4eb7aee63cba201bf47641dad3e92250.tar.xz | |
dm thin: prepare to support discard
This patch contains the ground work needed for dm-thin to support discard.
- Adds endio function that replaces shared_read_endio.
- Introduce an explicit 'quiesced' flag into the new_mapping structure.
Before, this was implicitly indicated by m->list being empty.
- The map_info->ptr remains constant for the duration of a bio's trip
through the thin target. Make it easier to reason about it.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'Documentation/device-mapper/thin-provisioning.txt')
0 files changed, 0 insertions, 0 deletions