From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-block@vger.kernel.org
Cc: axboe@kernel.dk, shli@kernel.org, Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: [PATCH 5/9] md: raid5 nowait support
Date: Wed, 4 Oct 2017 08:55:07 -0500 [thread overview]
Message-ID: <20171004135511.26110-6-rgoldwyn@suse.de> (raw)
In-Reply-To: <20171004135511.26110-1-rgoldwyn@suse.de>
From: Goldwyn Rodrigues <rgoldwyn@suse.com>
Return EAGAIN in case RAID5 would block because of waiting due to
reshaping.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
drivers/md/raid5.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 928e24a07133..707a3907d100 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5601,6 +5601,13 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
last_sector = bio_end_sector(bi);
bi->bi_next = NULL;
+ if ((bi->bi_opf & REQ_NOWAIT) &&
+ conf->reshape_progress != MaxSector &&
+ (mddev->reshape_backwards ? logical_sector < conf->reshape_safe : last_sector >= conf->reshape_safe)) {
+ bio_wouldblock_error(bi);
+ return true;
+ }
+
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
for (;logical_sector < last_sector; logical_sector += STRIPE_SECTORS) {
int previous;
--
2.14.2
next prev parent reply other threads:[~2017-10-04 13:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-04 13:55 [PATCH v2 0/9] Nowait support for stacked block devices Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 1/9] QUEUE_FLAG_NOWAIT to indicate device supports nowait Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 2/9] md: Add nowait support to md Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 3/9] md: raid1 nowait support Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 4/9] md: raid10 " Goldwyn Rodrigues
2017-10-04 13:55 ` Goldwyn Rodrigues [this message]
2017-10-04 13:55 ` [PATCH 6/9] dm: add " Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 7/9] dm: Add nowait support to raid1 Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 8/9] dm: Add nowait support to dm-delay Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 9/9] dm-mpath: Add nowait support Goldwyn Rodrigues
2017-10-05 17:19 ` [PATCH v2 0/9] Nowait support for stacked block devices Shaohua Li
2017-10-06 12:01 ` Goldwyn Rodrigues
2017-10-10 22:36 ` Shaohua Li
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171004135511.26110-6-rgoldwyn@suse.de \
--to=rgoldwyn@suse.de \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=rgoldwyn@suse.com \
--cc=shli@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox