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| author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2015-04-15 16:15:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:21 -0700 |
| commit | 8811a9421b325b06a2456ae1b8fe23e838cbfe33 (patch) | |
| tree | 892c5226ea92e00dffe24cd4bcb128ce5f7d9c50 | |
| parent | c72c6160d967ed26a0b136dbab337f821d233509 (diff) | |
| download | linux-8811a9421b325b06a2456ae1b8fe23e838cbfe33.tar.bz2 | |
zram: use generic start/end io accounting
Use bio generic_start_io_acct() and generic_end_io_acct() to account
device's block layer statistics. This will let users to monitor zram
activities using sysstat and similar packages/tools.
Apart from the usual per-stat sysfs attr, zram IO stats are now also
available in '/sys/block/zram<id>/stat' and '/proc/diskstats' files.
We will slowly get rid of per-stat sysfs files.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 871bd3550cb0..35dafd9a0350 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -670,8 +670,12 @@ out: static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, int offset, int rw) { + unsigned long start_time = jiffies; int ret; + generic_start_io_acct(rw, bvec->bv_len >> SECTOR_SHIFT, + &zram->disk->part0); + if (rw == READ) { atomic64_inc(&zram->stats.num_reads); ret = zram_bvec_read(zram, bvec, index, offset); @@ -680,6 +684,8 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, ret = zram_bvec_write(zram, bvec, index, offset); } + generic_end_io_acct(rw, &zram->disk->part0, start_time); + if (unlikely(ret)) { if (rw == READ) atomic64_inc(&zram->stats.failed_reads); |