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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: Thu, 28 Apr 2022 09:16:49 +0800	[thread overview]
Message-ID: <ac112584-ae97-f7e6-a593-f75c5d22d3b9@linux.dev> (raw)
In-Reply-To: <7db3cc87-c491-1ba4-d778-1c7dbbf34c47@deltatee.com>



On 4/28/22 12:08 AM, Logan Gunthorpe wrote:
>
>>> +        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.
> But the original comment was plainly wrong...

I think it was for get stripe for read-ahead.

https://elixir.bootlin.com/linux/v5.18-rc4/source/drivers/md/raid5.c#L5869

And it deserves a separate change if you think the comment is wrong, but
just my $0.02.

Thanks,
Guoqing

  reply	other threads:[~2022-04-28  1:17 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 [this message]
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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