From: Guoqing Jiang <guoqing.jiang@linux.dev>
To: Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org,
Song Liu <song@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Stephen Bates <sbates@raithlin.com>,
Martin Oliveira <Martin.Oliveira@eideticom.com>,
David Sloan <David.Sloan@eideticom.com>
Subject: Re: [PATCH v2 07/12] md/raid5: Move read_seqcount_begin() into make_stripe_request()
Date: Wed, 27 Apr 2022 10:13:43 +0800 [thread overview]
Message-ID: <3c8cc5d5-140e-3d9b-ea70-e1a3ce8513e4@linux.dev> (raw)
In-Reply-To: <20220420195425.34911-8-logang@deltatee.com>
On 4/21/22 3:54 AM, Logan Gunthorpe wrote:
> Now that prepare_to_wait() isn't in the way, move read_sequcount_begin()
> into make_stripe_request().
>
> No functional changes intended.
>
> Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
> ---
> drivers/md/raid5.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
> index b9f618356446..1bce9075e165 100644
> --- a/drivers/md/raid5.c
> +++ b/drivers/md/raid5.c
> @@ -5804,13 +5804,15 @@ struct stripe_request_ctx {
>
> static enum stripe_result make_stripe_request(struct mddev *mddev,
> struct r5conf *conf, struct stripe_request_ctx *ctx,
> - sector_t logical_sector, struct bio *bi, int seq)
> + sector_t logical_sector, struct bio *bi)
> {
> const int rw = bio_data_dir(bi);
> struct stripe_head *sh;
> sector_t new_sector;
> int previous = 0;
> - int dd_idx;
> + int seq, dd_idx;
> +
> + seq = read_seqcount_begin(&conf->gen_lock);
>
> if (unlikely(conf->reshape_progress != MaxSector)) {
> /* spinlock is needed as reshape_progress may be
> @@ -5970,13 +5972,9 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
> md_account_bio(mddev, &bi);
> prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
> for (; logical_sector < last_sector; logical_sector += RAID5_STRIPE_SECTORS(conf)) {
> - int seq;
> -
> retry:
> - seq = read_seqcount_begin(&conf->gen_lock);
> -
> res = make_stripe_request(mddev, conf, &ctx, logical_sector,
> - bi, seq);
> + bi);
> if (res == STRIPE_FAIL) {
> break;
> } else if (res == STRIPE_RETRY) {
Reviewed-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Thanks,
Guoqing
next prev parent reply other threads:[~2022-04-27 2:14 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-20 19:54 [PATCH v2 00/12] Improve Raid5 Lock Contention Logan Gunthorpe
2022-04-20 19:54 ` [PATCH v2 01/12] md/raid5: Factor out ahead_of_reshape() function Logan Gunthorpe
2022-04-21 6:07 ` Christoph Hellwig
2022-04-21 9:17 ` Paul Menzel
2022-04-21 16:05 ` Logan Gunthorpe
2022-04-21 23:33 ` Wol
2022-04-27 1:28 ` Guoqing Jiang
2022-04-27 16:07 ` Logan Gunthorpe
2022-04-28 1:49 ` Guoqing Jiang
2022-04-28 15:44 ` Logan Gunthorpe
2022-04-29 0:24 ` Guoqing Jiang
2022-04-20 19:54 ` [PATCH v2 02/12] md/raid5: Refactor raid5_make_request loop Logan Gunthorpe
2022-04-21 6:08 ` Christoph Hellwig
2022-04-27 1:32 ` Guoqing Jiang
2022-04-27 16:08 ` Logan Gunthorpe
2022-04-28 1:16 ` Guoqing Jiang
2022-04-20 19:54 ` [PATCH v2 03/12] md/raid5: Move stripe_add_to_batch_list() call out of add_stripe_bio() Logan Gunthorpe
2022-04-27 1:33 ` Guoqing Jiang
2022-04-20 19:54 ` [PATCH v2 04/12] md/raid5: Move common stripe count increment code into __find_stripe() Logan Gunthorpe
2022-04-21 6:10 ` Christoph Hellwig
2022-04-27 1:33 ` Guoqing Jiang
2022-04-20 19:54 ` [PATCH v2 05/12] md/raid5: Factor out helper from raid5_make_request() loop Logan Gunthorpe
2022-04-21 6:14 ` Christoph Hellwig
2022-04-20 19:54 ` [PATCH v2 06/12] md/raid5: Drop the do_prepare flag in raid5_make_request() Logan Gunthorpe
2022-04-21 6:15 ` Christoph Hellwig
2022-04-27 2:11 ` Guoqing Jiang
2022-04-20 19:54 ` [PATCH v2 07/12] md/raid5: Move read_seqcount_begin() into make_stripe_request() Logan Gunthorpe
2022-04-21 6:15 ` Christoph Hellwig
2022-04-27 2:13 ` Guoqing Jiang [this message]
2022-04-20 19:54 ` [PATCH v2 08/12] md/raid5: Refactor for loop in raid5_make_request() into while loop Logan Gunthorpe
2022-04-21 6:16 ` Christoph Hellwig
2022-04-20 19:54 ` [PATCH v2 09/12] md/raid5: Keep a reference to last stripe_head for batch Logan Gunthorpe
2022-04-21 6:17 ` Christoph Hellwig
2022-04-27 1:36 ` Guoqing Jiang
2022-04-27 23:27 ` Logan Gunthorpe
2022-04-20 19:54 ` [PATCH v2 10/12] md/raid5: Refactor add_stripe_bio() Logan Gunthorpe
2022-04-21 6:18 ` Christoph Hellwig
2022-04-20 19:54 ` [PATCH v2 11/12] md/raid5: Check all disks in a stripe_head for reshape progress Logan Gunthorpe
2022-04-21 6:18 ` Christoph Hellwig
2022-04-27 1:53 ` Guoqing Jiang
2022-04-27 16:11 ` Logan Gunthorpe
2022-04-20 19:54 ` [PATCH v2 12/12] md/raid5: Pivot raid5_make_request() Logan Gunthorpe
2022-04-21 6:43 ` Christoph Hellwig
2022-04-21 15:54 ` Logan Gunthorpe
2022-04-27 2:06 ` Guoqing Jiang
2022-04-27 16:18 ` Logan Gunthorpe
2022-04-28 1:32 ` Guoqing Jiang
2022-04-21 8:45 ` [PATCH v2 00/12] Improve Raid5 Lock Contention Xiao Ni
2022-04-21 16:02 ` Logan Gunthorpe
2022-04-24 8:00 ` Guoqing Jiang
2022-04-25 15:39 ` Logan Gunthorpe
2022-04-25 16:12 ` Xiao Ni
2022-04-28 21:22 ` Logan Gunthorpe
2022-04-29 0:49 ` Guoqing Jiang
2022-04-29 16:01 ` Logan Gunthorpe
2022-04-30 1:44 ` Guoqing Jiang
2022-04-24 7:53 ` Guoqing Jiang
2022-04-25 15:37 ` Logan Gunthorpe
2022-04-25 23:07 ` Song Liu
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