* + zram-refactor-zram_bdev_write.patch added to mm-unstable branch
@ 2023-04-06 22:18 Andrew Morton
2023-04-07 1:07 ` Sergey Senozhatsky
0 siblings, 1 reply; 3+ messages in thread
From: Andrew Morton @ 2023-04-06 22:18 UTC (permalink / raw)
To: mm-commits, senozhatsky, minchan, axboe, hch, akpm
The patch titled
Subject: zram: refactor zram_bdev_write
has been added to the -mm mm-unstable branch. Its filename is
zram-refactor-zram_bdev_write.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-refactor-zram_bdev_write.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@lst.de>
Subject: zram: refactor zram_bdev_write
Date: Thu, 6 Apr 2023 16:40:58 +0200
Split the read/modify/write case into a separate helper.
Link: https://lkml.kernel.org/r/20230406144102.149231-13-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
drivers/block/zram/zram_drv.c | 38 ++++++++++++++++----------------
1 file changed, 19 insertions(+), 19 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-refactor-zram_bdev_write
+++ a/drivers/block/zram/zram_drv.c
@@ -1574,33 +1574,33 @@ out:
return ret;
}
-static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
- u32 index, int offset, struct bio *bio)
+/*
+ * This is a partial IO. Read the full page before writing the changes.
+ */
+static int zram_bvec_write_partial(struct zram *zram, struct bio_vec *bvec,
+ u32 index, int offset, struct bio *bio)
{
- struct page *page = bvec->bv_page;
+ struct page *page = alloc_page(GFP_NOIO);
int ret;
- if (is_partial_io(bvec)) {
- /*
- * This is a partial IO. We need to read the full page
- * before to write the changes.
- */
- page = alloc_page(GFP_NOIO);
- if (!page)
- return -ENOMEM;
-
- ret = zram_read_page(zram, page, index, bio, true);
- if (ret)
- goto out;
+ if (!page)
+ return -ENOMEM;
+ ret = zram_read_page(zram, page, index, bio, true);
+ if (!ret) {
memcpy_from_bvec(page_address(page) + offset, bvec);
+ ret = zram_write_page(zram, page, index);
}
+ __free_page(page);
+ return ret;
+}
- ret = zram_write_page(zram, page, index);
-out:
+static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
+ u32 index, int offset, struct bio *bio)
+{
if (is_partial_io(bvec))
- __free_page(page);
- return ret;
+ return zram_bvec_write_partial(zram, bvec, index, offset, bio);
+ return zram_write_page(zram, bvec->bv_page, index);
}
#ifdef CONFIG_ZRAM_MULTI_COMP
_
Patches currently in -mm which might be from hch@lst.de 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: + zram-refactor-zram_bdev_write.patch added to mm-unstable branch
2023-04-06 22:18 Andrew Morton
@ 2023-04-07 1:07 ` Sergey Senozhatsky
0 siblings, 0 replies; 3+ messages in thread
From: Sergey Senozhatsky @ 2023-04-07 1:07 UTC (permalink / raw)
To: Andrew Morton; +Cc: mm-commits, senozhatsky, minchan, axboe, hch
On (23/04/06 15:18), Andrew Morton wrote:
>
> Split the read/modify/write case into a separate helper.
>
> Link: https://lkml.kernel.org/r/20230406144102.149231-13-hch@lst.de
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Minchan Kim <minchan@kernel.org>
> Cc: Jens Axboe <axboe@kernel.dk>
> Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
* + zram-refactor-zram_bdev_write.patch added to mm-unstable branch
@ 2023-04-11 20:57 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2023-04-11 20:57 UTC (permalink / raw)
To: mm-commits, senozhatsky, minchan, axboe, hch, akpm
The patch titled
Subject: zram: refactor zram_bdev_write
has been added to the -mm mm-unstable branch. Its filename is
zram-refactor-zram_bdev_write.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-refactor-zram_bdev_write.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@lst.de>
Subject: zram: refactor zram_bdev_write
Date: Tue, 11 Apr 2023 19:14:55 +0200
Split the read/modify/write case into a separate helper.
Link: https://lkml.kernel.org/r/20230411171459.567614-14-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
drivers/block/zram/zram_drv.c | 38 ++++++++++++++++----------------
1 file changed, 19 insertions(+), 19 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-refactor-zram_bdev_write
+++ a/drivers/block/zram/zram_drv.c
@@ -1568,33 +1568,33 @@ out:
return ret;
}
-static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
- u32 index, int offset, struct bio *bio)
+/*
+ * This is a partial IO. Read the full page before writing the changes.
+ */
+static int zram_bvec_write_partial(struct zram *zram, struct bio_vec *bvec,
+ u32 index, int offset, struct bio *bio)
{
- struct page *page = bvec->bv_page;
+ struct page *page = alloc_page(GFP_NOIO);
int ret;
- if (is_partial_io(bvec)) {
- /*
- * This is a partial IO. We need to read the full page
- * before to write the changes.
- */
- page = alloc_page(GFP_NOIO);
- if (!page)
- return -ENOMEM;
-
- ret = zram_read_page(zram, page, index, bio, true);
- if (ret)
- goto out;
+ if (!page)
+ return -ENOMEM;
+ ret = zram_read_page(zram, page, index, bio, true);
+ if (!ret) {
memcpy_from_bvec(page_address(page) + offset, bvec);
+ ret = zram_write_page(zram, page, index);
}
+ __free_page(page);
+ return ret;
+}
- ret = zram_write_page(zram, page, index);
-out:
+static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
+ u32 index, int offset, struct bio *bio)
+{
if (is_partial_io(bvec))
- __free_page(page);
- return ret;
+ return zram_bvec_write_partial(zram, bvec, index, offset, bio);
+ return zram_write_page(zram, bvec->bv_page, index);
}
#ifdef CONFIG_ZRAM_MULTI_COMP
_
Patches currently in -mm which might be from hch@lst.de are
zram-always-compile-read_from_bdev_sync.patch
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
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-04-06 22:18 Andrew Morton
2023-04-07 1:07 ` Sergey Senozhatsky
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