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authorMichael Callahan <michaelcallahan@fb.com>2018-07-18 04:47:39 -0700
committerJens Axboe <axboe@kernel.dk>2018-07-18 08:44:20 -0600
commitddcf35d397976421a4ec1d0d00fbcc027a8cb034 (patch)
treeebffc9e2971b6c7bc3223a1c584a9c81372a34bc /block/blk-core.c
parentdbae2c551377b6533a00c11fc7ede370100ab404 (diff)
block: Add and use op_stat_group() for indexing disk_stat fields.
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 <michaelcallahan@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Matias Bjorling <mb@lightnvm.io> Cc: Kent Overstreet <kent.overstreet@gmail.com> Cc: Alasdair Kergon <agk@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index c4b57d8806fe..03a4ea93a5f3 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2702,13 +2702,13 @@ EXPORT_SYMBOL_GPL(blk_rq_err_bytes);
void blk_account_io_completion(struct request *req, unsigned int bytes)
{
if (blk_do_io_stat(req)) {
- const int rw = rq_data_dir(req);
+ const int sgrp = op_stat_group(req_op(req));
struct hd_struct *part;
int cpu;
cpu = part_stat_lock();
part = req->part;
- part_stat_add(cpu, part, sectors[rw], bytes >> 9);
+ part_stat_add(cpu, part, sectors[sgrp], bytes >> 9);
part_stat_unlock();
}
}
@@ -2722,7 +2722,7 @@ void blk_account_io_done(struct request *req, u64 now)
*/
if (blk_do_io_stat(req) && !(req->rq_flags & RQF_FLUSH_SEQ)) {
unsigned long duration;
- const int rw = rq_data_dir(req);
+ const int sgrp = op_stat_group(req_op(req));
struct hd_struct *part;
int cpu;
@@ -2730,10 +2730,10 @@ void blk_account_io_done(struct request *req, u64 now)
cpu = part_stat_lock();
part = req->part;
- part_stat_inc(cpu, part, ios[rw]);
- part_stat_add(cpu, part, ticks[rw], duration);
+ part_stat_inc(cpu, part, ios[sgrp]);
+ part_stat_add(cpu, part, ticks[sgrp], duration);
part_round_stats(req->q, cpu, part);
- part_dec_in_flight(req->q, part, rw);
+ part_dec_in_flight(req->q, part, rq_data_dir(req));
hd_struct_put(part);
part_stat_unlock();