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| author | JP Abgrall <jpa@google.com> | 2012-04-24 21:45:20 -0700 |
|---|---|---|
| committer | JP Abgrall <jpa@google.com> | 2012-04-24 21:45:20 -0700 |
| commit | 10add970b62d2276541af9e5fb0581d6d8434db4 (patch) | |
| tree | afd79e8507c5fa243c044a6963072b6a6d0f059b /drivers/md/dm-io.c | |
| parent | 9cea9c804af57f8538dc910e24c407c81e496e51 (diff) | |
| parent | 66510aa1148e3457e7d46e0a2582dac7c591b95d (diff) | |
| download | kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.zip kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.tar.gz kernel_samsung_crespo-10add970b62d2276541af9e5fb0581d6d8434db4.tar.bz2 | |
Merge remote-tracking branch 'common/android-3.0' into android-samsung-30-wip-mergedown
* common/android-3.0: (1178 commits)
cpufreq: interactive: remove unused target_validate_time_in_idle
cpufreq: interactive: Boost frequency on touchscreen input
cpufreq: Separate speed target revalidate time and initial set time
cpufreq: interactive: based hispeed bump on target freq, not actual
cpufreq: interactive: adjust code and documentation to match
cpufreq: interactive: configurable delay before raising above hispeed
sync: add poll support
sw_sync: add fill_driver_data support
sync: add ioctl to get fence data
sw_sync: add debug support
sync: add debugfs support
sync: add timestamps to sync_pts
sw_sync: add cpu based sync driver
sync: Add synchronization framework
Linux 3.0.28
Bluetooth: Fix l2cap conn failures for ssp devices
TOMOYO: Fix mount flags checking order.
iommu/amd: Make sure IOMMU interrupts are re-enabled on resume
cred: copy_process() should clear child->replacement_session_keyring
ASoC: ak4642: fixup: mute needs +1 step
...
Conflicts:
mm/compaction.c
Change-Id: I3dc59225d2435eddbed0c639155179e580891ac8
Signed-off-by: JP Abgrall <jpa@google.com>
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index ad2eba4..ea5dd28 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -296,6 +296,8 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, unsigned offset; unsigned num_bvecs; sector_t remaining = where->count; + struct request_queue *q = bdev_get_queue(where->bdev); + sector_t discard_sectors; /* * where->count may be zero if rw holds a flush and we need to @@ -305,9 +307,12 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, /* * Allocate a suitably sized-bio. */ - num_bvecs = dm_sector_div_up(remaining, - (PAGE_SIZE >> SECTOR_SHIFT)); - num_bvecs = min_t(int, bio_get_nr_vecs(where->bdev), num_bvecs); + if (rw & REQ_DISCARD) + num_bvecs = 1; + else + num_bvecs = min_t(int, bio_get_nr_vecs(where->bdev), + dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT))); + bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios); bio->bi_sector = where->sector + (where->count - remaining); bio->bi_bdev = where->bdev; @@ -315,10 +320,14 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, bio->bi_destructor = dm_bio_destructor; store_io_and_region_in_bio(bio, io, region); - /* - * Try and add as many pages as possible. - */ - while (remaining) { + if (rw & REQ_DISCARD) { + discard_sectors = min_t(sector_t, q->limits.max_discard_sectors, remaining); + bio->bi_size = discard_sectors << SECTOR_SHIFT; + remaining -= discard_sectors; + } else while (remaining) { + /* + * Try and add as many pages as possible. + */ dp->get_page(dp, &page, &len, &offset); len = min(len, to_bytes(remaining)); if (!bio_add_page(bio, page, len, offset)) |