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 02/12] md/raid5: Refactor raid5_make_request loop
Date: Wed, 27 Apr 2022 09:32:14 +0800 [thread overview]
Message-ID: <eb1d70f6-0cfc-20e9-8fb3-84e3076025f7@linux.dev> (raw)
In-Reply-To: <20220420195425.34911-3-logang@deltatee.com>
On 4/21/22 3:54 AM, Logan Gunthorpe wrote:
> Break immediately if raid5_get_active_stripe() returns NULL and deindent
> the rest of the loop. Annotate this check with an unlikely().
>
> This makes the code easier to read and reduces the indentation level.
>
> No functional changes intended.
>
> Signed-off-by: Logan Gunthorpe<logang@deltatee.com>
> ---
> drivers/md/raid5.c | 109 +++++++++++++++++++++++----------------------
> 1 file changed, 55 insertions(+), 54 deletions(-)
>
> diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
> index 97b23c18402b..cda6857e6207 100644
> --- a/drivers/md/raid5.c
> +++ b/drivers/md/raid5.c
> @@ -5906,68 +5906,69 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
...
> + if (unlikely(!sh)) {
> + /* cannot get stripe, just give-up */
> + bi->bi_status = BLK_STS_IOERR;
> + break;
> + }
Nit, I would suggest to keep below original comment.
> - /* cannot get stripe for read-ahead, just give-up */
> - bi->bi_status = BLK_STS_IOERR;
> - break;
Anyway. Reviewed-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Thanks,
Guoqing
next prev parent reply other threads:[~2022-04-27 1:32 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 [this message]
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
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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