linux-kernel - Re: [PATCH v2 12/17] md/raid5-cache: Move struct r5l

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Message-ID: <6605fb80-47c4-3a42-1fde-fbb42886ebc3@deltatee.com>
Date:   Wed, 1 Jun 2022 16:42:00 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     Song Liu <song@...nel.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-raid <linux-raid@...r.kernel.org>,
        Donald Buczek <buczek@...gen.mpg.de>,
        Guoqing Jiang <guoqing.jiang@...ux.dev>,
        Xiao Ni <xni@...hat.com>, Stephen Bates <sbates@...thlin.com>,
        Martin Oliveira <Martin.Oliveira@...eticom.com>,
        David Sloan <David.Sloan@...eticom.com>
Subject: Re: [PATCH v2 12/17] md/raid5-cache: Move struct r5l_log definition
 to raid5-log.h



On 2022-06-01 16:36, Song Liu wrote:
>> I guess we could do that. All the inline functions in raid5-log.h are
>> there to choose between the r5l or the ppl implementaiton. So it that
>> would mean the r5l implementation would probably be inlined and ppl
>> would be doing a second out of line call. Not sure if that matters, but
>> it seems a little odd.
> 
> I like the current version better. raid5-log.h is not used in many files anyway.

It's a moot point now. v3 will follow Christoph's other feedback which
essentially removes the RCU access altogether and adds an appropriate
lock in a couple places.

Logan