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block: remove PSI accounting from the bio layer 

PSI accounting is now done by the VM code, where it should have been
since the beginning.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lore.kernel.org/r/20220915094200.139713-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-09-15 10:42:00 +01:00 committed by Jens Axboe
parent 99486c511f
commit 118f3663fb
4 changed files with 0 additions and 28 deletions
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8
block/bio.c
View File

@ -1063,9 +1063,6 @@ void __bio_add_page(struct bio *bio, struct page *page,
bio->bi_iter.bi_size += len;
bio->bi_vcnt++;
if (!bio_flagged(bio, BIO_WORKINGSET) && unlikely(PageWorkingset(page)))
bio_set_flag(bio, BIO_WORKINGSET);
}
EXPORT_SYMBOL_GPL(__bio_add_page);
@ -1274,9 +1271,6 @@ out:
* fit into the bio, or are requested in @iter, whatever is smaller. If
* MM encounters an error pinning the requested pages, it stops. Error
* is returned only if 0 pages could be pinned.
*
* It's intended for direct IO, so doesn't do PSI tracking, the caller is
* responsible for setting BIO_WORKINGSET if necessary.
*/
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
{
@ -1292,8 +1286,6 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
ret = __bio_iov_iter_get_pages(bio, iter);
} while (!ret && iov_iter_count(iter) && !bio_full(bio, 0));
/* don't account direct I/O as memory stall */
bio_clear_flag(bio, BIO_WORKINGSET);
return bio->bi_vcnt ? 0 : ret;
}
EXPORT_SYMBOL_GPL(bio_iov_iter_get_pages);

17
block/blk-core.c
View File

@ -37,7 +37,6 @@
#include <linux/t10-pi.h>
#include <linux/debugfs.h>
#include <linux/bpf.h>
#include <linux/psi.h>
#include <linux/part_stat.h>
#include <linux/sched/sysctl.h>
#include <linux/blk-crypto.h>
@ -825,22 +824,6 @@ void submit_bio(struct bio *bio)
count_vm_events(PGPGOUT, bio_sectors(bio));
}
/*
* If we're reading data that is part of the userspace workingset, count
* submission time as memory stall. When the device is congested, or
* the submitting cgroup IO-throttled, submission can be a significant
* part of overall IO time.
*/
if (unlikely(bio_op(bio) == REQ_OP_READ &&
bio_flagged(bio, BIO_WORKINGSET))) {
unsigned long pflags;
psi_memstall_enter(&pflags);
submit_bio_noacct(bio);
psi_memstall_leave(&pflags);
return;
}
submit_bio_noacct(bio);
}
EXPORT_SYMBOL(submit_bio);

2
fs/direct-io.c
View File

@ -421,8 +421,6 @@ static inline void dio_bio_submit(struct dio *dio, struct dio_submit *sdio)
unsigned long flags;
bio->bi_private = dio;
/* don't account direct I/O as memory stall */
bio_clear_flag(bio, BIO_WORKINGSET);
spin_lock_irqsave(&dio->bio_lock, flags);
dio->refcount++;

1
include/linux/blk_types.h
View File

@ -321,7 +321,6 @@ enum {
BIO_NO_PAGE_REF, /* don't put release vec pages */
BIO_CLONED, /* doesn't own data */
BIO_BOUNCED, /* bio is a bounce bio */
BIO_WORKINGSET, /* contains userspace workingset pages */
BIO_QUIET, /* Make BIO Quiet */
BIO_CHAIN, /* chained bio, ->bi_remaining in effect */
BIO_REFFED, /* bio has elevated ->bi_cnt */