The patch titled
Subject: zram: return early on error in zram_bvec_rw
has been added to the -mm mm-unstable branch. Its filename is
zram-return-early-on-error-in-zram_bvec_rw.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-return-early-on-error-in-zram_bvec_rw.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: zram: return early on error in zram_bvec_rw
Date: Thu, 6 Apr 2023 16:40:51 +0200
When the low-level access fails, don't clear the idle flag or clear the
caches, and just return.
Link: https://lkml.kernel.org/r/20230406144102.149231-6-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-return-early-on-error-in-zram_bvec_rw
+++ a/drivers/block/zram/zram_drv.c
@@ -1939,23 +1939,23 @@ static int zram_bvec_rw(struct zram *zra
if (!op_is_write(op)) {
ret = zram_bvec_read(zram, bvec, index, offset, bio);
+ if (unlikely(ret < 0)) {
+ atomic64_inc(&zram->stats.failed_reads);
+ return ret;
+ }
flush_dcache_page(bvec->bv_page);
} else {
ret = zram_bvec_write(zram, bvec, index, offset, bio);
+ if (unlikely(ret < 0)) {
+ atomic64_inc(&zram->stats.failed_writes);
+ return ret;
+ }
}
zram_slot_lock(zram, index);
zram_accessed(zram, index);
zram_slot_unlock(zram, index);
-
- if (unlikely(ret < 0)) {
- if (!op_is_write(op))
- atomic64_inc(&zram->stats.failed_reads);
- else
- atomic64_inc(&zram->stats.failed_writes);
- }
-
- return ret;
+ return 0;
}
static void __zram_make_request(struct zram *zram, struct bio *bio)
_
Patches currently in -mm which might be from hch@xxxxxx are
zram-remove-valid_io_request.patch
zram-make-zram_bio_discard-more-self-contained.patch
zram-simplify-bvec-iteration-in-__zram_make_request.patch
zram-move-discard-handling-to-zram_submit_bio.patch
zram-return-early-on-error-in-zram_bvec_rw.patch
zram-refactor-highlevel-read-and-write-handling.patch
zram-dont-use-highmem-for-the-bounce-buffer-in-zram_bvec_readwrite.patch
zram-rename-__zram_bvec_read-to-zram_read_page.patch
zram-directly-call-zram_read_page-in-writeback_store.patch
zram-refactor-zram_bdev_read.patch
zram-dont-pass-a-bvec-to-__zram_bvec_write.patch
zram-refactor-zram_bdev_write.patch
zram-pass-a-page-to-read_from_bdev.patch
zram-dont-return-errors-from-read_from_bdev_async.patch
zram-fix-synchronous-reads.patch
zram-return-errors-from-read_from_bdev_sync.patch
