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block: Add and use op_stat_group() for indexing disk_stat fields.

Browse source 
Add and use a new op_stat_group() function for indexing partition stat
fields rather than indexing them by rq_data_dir() or bio_data_dir().
This function works similarly to op_is_sync() in that it takes the
request::cmd_flags or bio::bi_opf flags and determines which stats
should et updated.

In addition, the second parameter to generic_start_io_acct() and
generic_end_io_acct() is now a REQ_OP rather than simply a read or
write bit and it uses op_stat_group() on the parameter to determine
the stat group.

Note that the partition in_flight counts are not part of the per-cpu
statistics and as such are not indexed via this function.  It's now
indexed by op_is_write().

tj: Refreshed on top of v4.17.  Updated to pass around REQ_OP.

Signed-off-by: Michael Callahan <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Joshua Morris <[email protected]>
Cc: Philipp Reisner <[email protected]>
Cc: Matias Bjorling <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Alasdair Kergon <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Michael Callahan 2018-07-18 04:47:39 -07:00 • committed by Jens Axboe
commit ddcf35d397
13 changed files with 50 additions and 43 deletions
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7
drivers/nvdimm/nd.h
View file

@ -396,16 +396,15 @@ static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
return false;
*start = jiffies;
generic_start_io_acct(disk->queue, bio_data_dir(bio),
bio_sectors(bio), &disk->part0);
generic_start_io_acct(disk->queue, bio_op(bio), bio_sectors(bio),
&disk->part0);
return true;
}
static inline void nd_iostat_end(struct bio *bio, unsigned long start)
{
struct gendisk *disk = bio->bi_disk;
generic_end_io_acct(disk->queue, bio_data_dir(bio), &disk->part0,
start);
generic_end_io_acct(disk->queue, bio_op(bio), &disk->part0, start);
}
static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
unsigned int len)