From: Christoph Hellwig <hch@lst.de>
To: Shaohua Li <shli@fb.com>, neilb@suse.de
Cc: linux-raid@vger.kernel.org, Kernel-team@fb.com, dan.j.williams@intel.com
Subject: [PATCH 07/12] raid5-cache: refactor bio allocation
Date: Sat, 12 Sep 2015 08:17:13 +0200 [thread overview]
Message-ID: <1442038638-6947-8-git-send-email-hch@lst.de> (raw)
In-Reply-To: <1442038638-6947-1-git-send-email-hch@lst.de>
Split out a helper to allocate a bio for log writes.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/md/raid5-cache.c | 44 ++++++++++++++++++++------------------------
1 file changed, 20 insertions(+), 24 deletions(-)
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index f9aaf2b..fb1ac4c 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -274,11 +274,25 @@ static void r5l_submit_current_io(struct r5l_log *log)
}
}
+static struct bio *r5l_bio_alloc(struct r5l_log *log, struct r5l_io_unit *io)
+{
+ struct bio *bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
+
+ bio->bi_rw = WRITE;
+ bio->bi_bdev = log->rdev->bdev;
+ bio->bi_iter.bi_sector = log->log_start;
+ bio->bi_end_io = r5l_log_endio;
+ bio->bi_private = io;
+
+ bio_list_add(&io->bios, bio);
+ atomic_inc(&io->pending_io);
+ return bio;
+}
+
static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log)
{
struct r5l_io_unit *io;
struct r5l_meta_block *block;
- struct bio *bio;
io = r5l_alloc_io_unit(log);
@@ -292,17 +306,8 @@ static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log)
io->meta_offset = sizeof(struct r5l_meta_block);
io->seq = log->seq;
- bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
- io->current_bio = bio;
- bio->bi_rw = WRITE;
- bio->bi_bdev = log->rdev->bdev;
- bio->bi_iter.bi_sector = log->log_start;
- bio_add_page(bio, io->meta_page, PAGE_SIZE, 0);
- bio->bi_end_io = r5l_log_endio;
- bio->bi_private = io;
-
- bio_list_add(&io->bios, bio);
- atomic_inc(&io->pending_io);
+ io->current_bio = r5l_bio_alloc(log, io);
+ bio_add_page(io->current_bio, io->meta_page, PAGE_SIZE, 0);
log->seq++;
log->log_start = r5l_ring_add(log, log->log_start, BLOCK_SECTORS);
@@ -355,18 +360,9 @@ static void r5l_append_payload_page(struct r5l_log *log, struct page *page)
struct r5l_io_unit *io = log->current_io;
alloc_bio:
- if (!io->current_bio) {
- struct bio *bio;
- bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL, BIO_MAX_PAGES);
- bio->bi_rw = WRITE;
- bio->bi_bdev = log->rdev->bdev;
- bio->bi_iter.bi_sector = log->log_start;
- bio->bi_end_io = r5l_log_endio;
- bio->bi_private = io;
- bio_list_add(&io->bios, bio);
- atomic_inc(&io->pending_io);
- io->current_bio = bio;
- }
+ if (!io->current_bio)
+ io->current_bio = r5l_bio_alloc(log, io);
+
if (!bio_add_page(io->current_bio, page, PAGE_SIZE, 0)) {
io->current_bio = NULL;
goto alloc_bio;
--
1.9.1
next prev parent reply other threads:[~2015-09-12 6:17 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-12 6:17 raid5-cache I/O path improvements V2 Christoph Hellwig
2015-09-12 6:17 ` [PATCH 01/12] raid5-cache: port to 4.3-rc Christoph Hellwig
2015-09-12 6:17 ` [PATCH 02/12] raid5-cache: free I/O units earlier Christoph Hellwig
2015-09-15 7:00 ` Neil Brown
2015-09-17 1:50 ` Christoph Hellwig
2015-09-15 8:07 ` Neil Brown
2015-09-17 1:48 ` Christoph Hellwig
2015-09-12 6:17 ` [PATCH 03/12] raid5-cache: rename flushed_ios to finished_ios Christoph Hellwig
2015-09-12 6:17 ` [PATCH 04/12] raid5-cache: factor out a helper to run all stripes for an I/O unit Christoph Hellwig
2015-09-12 6:17 ` [PATCH 05/12] raid5-cache: use FUA writes for the log Christoph Hellwig
2015-09-12 6:17 ` [PATCH 06/12] raid5-cache: clean up r5l_get_meta Christoph Hellwig
2015-09-12 6:17 ` Christoph Hellwig [this message]
2015-09-12 6:17 ` [PATCH 08/12] raid5-cache: take rdev->data_offset into account early on Christoph Hellwig
2015-09-12 6:17 ` [PATCH 09/12] raid5-cache: inline r5l_alloc_io_unit into r5l_new_meta Christoph Hellwig
2015-09-12 6:17 ` [PATCH 10/12] raid5-cache: new helper: r5_reserve_log_entry Christoph Hellwig
2015-09-12 6:17 ` [PATCH 11/12] raid5-cache: small log->seq cleanup Christoph Hellwig
2015-09-12 6:17 ` [PATCH 12/12] raid5-cache: use bio chaining Christoph Hellwig
2015-09-14 19:11 ` raid5-cache I/O path improvements V2 Shaohua Li
2015-09-15 7:23 ` Neil Brown
2015-09-15 21:54 ` Shaohua Li
2015-09-17 1:53 ` Christoph Hellwig
2015-09-28 14:01 ` Christoph Hellwig
2015-09-30 5:39 ` Neil Brown
2015-09-30 15:00 ` Christoph Hellwig
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