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dm io: Support IO priority

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Some IO will dispatch from kworker with different io_context settings
than the submitting task, we may need to specify a priority to avoid
losing priority.

Add IO priority parameter to dm_io() and update all callers.

Co-developed-by: Yibin Ding <yibin.ding@unisoc.com>
Signed-off-by: Yibin Ding <yibin.ding@unisoc.com>
Signed-off-by: Hongyu Jin <hongyu.jin@unisoc.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Hongyu Jin 2024-01-24 13:35:53 +08:00 committed by Mike Snitzer
parent b9d3ac48a8
commit 6e5f0f6383
10 changed files with 38 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/md/dm-bufio.c
View File

@ -1315,7 +1315,7 @@ static void use_dmio(struct dm_buffer *b, enum req_op op, sector_t sector,
io_req.mem.ptr.vma = (char *)b->data + offset;
}
r = dm_io(&io_req, 1, &region, NULL);
r = dm_io(&io_req, 1, &region, NULL, IOPRIO_DEFAULT);
if (unlikely(r))
b->end_io(b, errno_to_blk_status(r));
}
@ -2167,7 +2167,7 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c)
if (WARN_ON_ONCE(dm_bufio_in_request()))
return -EINVAL;
return dm_io(&io_req, 1, &io_reg, NULL);
return dm_io(&io_req, 1, &io_reg, NULL, IOPRIO_DEFAULT);
}
EXPORT_SYMBOL_GPL(dm_bufio_issue_flush);
@ -2191,7 +2191,7 @@ int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t c
if (WARN_ON_ONCE(dm_bufio_in_request()))
return -EINVAL; /* discards are optional */
return dm_io(&io_req, 1, &io_reg, NULL);
return dm_io(&io_req, 1, &io_reg, NULL, IOPRIO_DEFAULT);
}
EXPORT_SYMBOL_GPL(dm_bufio_issue_discard);

12
drivers/md/dm-integrity.c
View File

@ -555,7 +555,7 @@ static int sync_rw_sb(struct dm_integrity_c *ic, blk_opf_t opf)
}
}
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r))
return r;
@ -1073,7 +1073,7 @@ static void rw_journal_sectors(struct dm_integrity_c *ic, blk_opf_t opf,
io_loc.sector = ic->start + SB_SECTORS + sector;
io_loc.count = n_sectors;
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r)) {
dm_integrity_io_error(ic, (opf & REQ_OP_MASK) == REQ_OP_READ ?
"reading journal" : "writing journal", r);
@ -1190,7 +1190,7 @@ static void copy_from_journal(struct dm_integrity_c *ic, unsigned int section, u
io_loc.sector = target;
io_loc.count = n_sectors;
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r)) {
WARN_ONCE(1, "asynchronous dm_io failed: %d", r);
fn(-1UL, data);
@ -1519,7 +1519,7 @@ static void dm_integrity_flush_buffers(struct dm_integrity_c *ic, bool flush_dat
fr.io_reg.count = 0,
fr.ic = ic;
init_completion(&fr.comp);
r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL);
r = dm_io(&fr.io_req, 1, &fr.io_reg, NULL, IOPRIO_DEFAULT);
BUG_ON(r);
}
@ -1728,7 +1728,7 @@ static void integrity_recheck(struct dm_integrity_io *dio)
io_loc.sector = sector;
io_loc.count = ic->sectors_per_block;
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r)) {
dio->bi_status = errno_to_blk_status(r);
goto free_ret;
@ -2808,7 +2808,7 @@ next_chunk:
io_loc.sector = get_data_sector(ic, area, offset);
io_loc.count = n_sectors;
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r)) {
dm_integrity_io_error(ic, "reading data", r);
goto err;

23
drivers/md/dm-io.c
View File

@ -305,7 +305,7 @@ static void km_dp_init(struct dpages *dp, void *data)
*/
static void do_region(const blk_opf_t opf, unsigned int region,
struct dm_io_region *where, struct dpages *dp,
struct io *io)
struct io *io, unsigned short ioprio)
{
struct bio *bio;
struct page *page;
@ -354,6 +354,7 @@ static void do_region(const blk_opf_t opf, unsigned int region,
&io->client->bios);
bio->bi_iter.bi_sector = where->sector + (where->count - remaining);
bio->bi_end_io = endio;
bio->bi_ioprio = ioprio;
store_io_and_region_in_bio(bio, io, region);
if (op == REQ_OP_DISCARD || op == REQ_OP_WRITE_ZEROES) {
@ -383,7 +384,7 @@ static void do_region(const blk_opf_t opf, unsigned int region,
static void dispatch_io(blk_opf_t opf, unsigned int num_regions,
struct dm_io_region *where, struct dpages *dp,
struct io *io, int sync)
struct io *io, int sync, unsigned short ioprio)
{
int i;
struct dpages old_pages = *dp;
@ -400,7 +401,7 @@ static void dispatch_io(blk_opf_t opf, unsigned int num_regions,
for (i = 0; i < num_regions; i++) {
*dp = old_pages;
if (where[i].count || (opf & REQ_PREFLUSH))
do_region(opf, i, where + i, dp, io);
do_region(opf, i, where + i, dp, io, ioprio);
}
/*
@ -425,7 +426,7 @@ static void sync_io_complete(unsigned long error, void *context)
static int sync_io(struct dm_io_client *client, unsigned int num_regions,
struct dm_io_region *where, blk_opf_t opf, struct dpages *dp,
unsigned long *error_bits)
unsigned long *error_bits, unsigned short ioprio)
{
struct io *io;
struct sync_io sio;
@ -447,7 +448,7 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
io->vma_invalidate_address = dp->vma_invalidate_address;
io->vma_invalidate_size = dp->vma_invalidate_size;
dispatch_io(opf, num_regions, where, dp, io, 1);
dispatch_io(opf, num_regions, where, dp, io, 1, ioprio);
wait_for_completion_io(&sio.wait);
@ -459,7 +460,8 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions,
static int async_io(struct dm_io_client *client, unsigned int num_regions,
struct dm_io_region *where, blk_opf_t opf,
struct dpages *dp, io_notify_fn fn, void *context)
struct dpages *dp, io_notify_fn fn, void *context,
unsigned short ioprio)
{
struct io *io;
@ -479,7 +481,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions,
io->vma_invalidate_address = dp->vma_invalidate_address;
io->vma_invalidate_size = dp->vma_invalidate_size;
dispatch_io(opf, num_regions, where, dp, io, 0);
dispatch_io(opf, num_regions, where, dp, io, 0, ioprio);
return 0;
}
@ -521,7 +523,8 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp,
}
int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
struct dm_io_region *where, unsigned long *sync_error_bits)
struct dm_io_region *where, unsigned long *sync_error_bits,
unsigned short ioprio)
{
int r;
struct dpages dp;
@ -532,11 +535,11 @@ int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
if (!io_req->notify.fn)
return sync_io(io_req->client, num_regions, where,
io_req->bi_opf, &dp, sync_error_bits);
io_req->bi_opf, &dp, sync_error_bits, ioprio);
return async_io(io_req->client, num_regions, where,
io_req->bi_opf, &dp, io_req->notify.fn,
io_req->notify.context);
io_req->notify.context, ioprio);
}
EXPORT_SYMBOL(dm_io);

4
drivers/md/dm-kcopyd.c
View File

@ -578,9 +578,9 @@ static int run_io_job(struct kcopyd_job *job)
io_job_start(job->kc->throttle);
if (job->op == REQ_OP_READ)
r = dm_io(&io_req, 1, &job->source, NULL);
r = dm_io(&io_req, 1, &job->source, NULL, IOPRIO_DEFAULT);
else
r = dm_io(&io_req, job->num_dests, job->dests, NULL);
r = dm_io(&io_req, job->num_dests, job->dests, NULL, IOPRIO_DEFAULT);
return r;
}

4
drivers/md/dm-log.c
View File

@ -300,7 +300,7 @@ static int rw_header(struct log_c *lc, enum req_op op)
{
lc->io_req.bi_opf = op;
return dm_io(&lc->io_req, 1, &lc->header_location, NULL);
return dm_io(&lc->io_req, 1, &lc->header_location, NULL, IOPRIO_DEFAULT);
}
static int flush_header(struct log_c *lc)
@ -313,7 +313,7 @@ static int flush_header(struct log_c *lc)
lc->io_req.bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
return dm_io(&lc->io_req, 1, &null_location, NULL);
return dm_io(&lc->io_req, 1, &null_location, NULL, IOPRIO_DEFAULT);
}
static int read_header(struct log_c *log)

6
drivers/md/dm-raid1.c
View File

@ -278,7 +278,7 @@ static int mirror_flush(struct dm_target *ti)
}
error_bits = -1;
dm_io(&io_req, ms->nr_mirrors, io, &error_bits);
dm_io(&io_req, ms->nr_mirrors, io, &error_bits, IOPRIO_DEFAULT);
if (unlikely(error_bits != 0)) {
for (i = 0; i < ms->nr_mirrors; i++)
if (test_bit(i, &error_bits))
@ -554,7 +554,7 @@ static void read_async_bio(struct mirror *m, struct bio *bio)
map_region(&io, m, bio);
bio_set_m(bio, m);
BUG_ON(dm_io(&io_req, 1, &io, NULL));
BUG_ON(dm_io(&io_req, 1, &io, NULL, IOPRIO_DEFAULT));
}
static inline int region_in_sync(struct mirror_set *ms, region_t region,
@ -681,7 +681,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
*/
bio_set_m(bio, get_default_mirror(ms));
BUG_ON(dm_io(&io_req, ms->nr_mirrors, io, NULL));
BUG_ON(dm_io(&io_req, ms->nr_mirrors, io, NULL, IOPRIO_DEFAULT));
}
static void do_writes(struct mirror_set *ms, struct bio_list *writes)

4
drivers/md/dm-snap-persistent.c
View File

@ -223,7 +223,7 @@ static void do_metadata(struct work_struct *work)
{
struct mdata_req *req = container_of(work, struct mdata_req, work);
req->result = dm_io(req->io_req, 1, req->where, NULL);
req->result = dm_io(req->io_req, 1, req->where, NULL, IOPRIO_DEFAULT);
}
/*
@ -247,7 +247,7 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, blk_opf_t opf,
struct mdata_req req;
if (!metadata)
return dm_io(&io_req, 1, &where, NULL);
return dm_io(&io_req, 1, &where, NULL, IOPRIO_DEFAULT);
req.where = &where;
req.io_req = &io_req;

2
drivers/md/dm-verity-target.c
View File

@ -511,7 +511,7 @@ static int verity_recheck(struct dm_verity *v, struct dm_verity_io *io,
io_loc.bdev = v->data_dev->bdev;
io_loc.sector = cur_block << (v->data_dev_block_bits - SECTOR_SHIFT);
io_loc.count = 1 << (v->data_dev_block_bits - SECTOR_SHIFT);
r = dm_io(&io_req, 1, &io_loc, NULL);
r = dm_io(&io_req, 1, &io_loc, NULL, IOPRIO_DEFAULT);
if (unlikely(r))
goto free_ret;

8
drivers/md/dm-writecache.c
View File

@ -531,7 +531,7 @@ static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
req.notify.context = &endio;
/* writing via async dm-io (implied by notify.fn above) won't return an error */
(void) dm_io(&req, 1, &region, NULL);
(void) dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
i = j;
}
@ -568,7 +568,7 @@ static void ssd_commit_superblock(struct dm_writecache *wc)
req.notify.fn = NULL;
req.notify.context = NULL;
r = dm_io(&req, 1, &region, NULL);
r = dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
if (unlikely(r))
writecache_error(wc, r, "error writing superblock");
}
@ -596,7 +596,7 @@ static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
req.client = wc->dm_io;
req.notify.fn = NULL;
r = dm_io(&req, 1, &region, NULL);
r = dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
if (unlikely(r))
writecache_error(wc, r, "error flushing metadata: %d", r);
}
@ -990,7 +990,7 @@ static int writecache_read_metadata(struct dm_writecache *wc, sector_t n_sectors
req.client = wc->dm_io;
req.notify.fn = NULL;
return dm_io(&req, 1, &region, NULL);
return dm_io(&req, 1, &region, NULL, IOPRIO_DEFAULT);
}
static void writecache_resume(struct dm_target *ti)

3
include/linux/dm-io.h
View File

@ -80,7 +80,8 @@ void dm_io_client_destroy(struct dm_io_client *client);
* error occurred doing io to the corresponding region.
*/
int dm_io(struct dm_io_request *io_req, unsigned int num_regions,
struct dm_io_region *region, unsigned int long *sync_error_bits);
struct dm_io_region *region, unsigned int long *sync_error_bits,
unsigned short ioprio);
#endif /* __KERNEL__ */
#endif /* _LINUX_DM_IO_H */