linux-kernel - Re: [PATCH v2 00/16] Allow readpage to return a locked page

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Message-ID: <20201015090242.GA12879@infradead.org>
Date:   Thu, 15 Oct 2020 10:02:42 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        linux-afs@...ts.infradead.org, ceph-devel@...r.kernel.org,
        linux-cifs@...r.kernel.org, ecryptfs@...r.kernel.org,
        linux-um@...ts.infradead.org, linux-mtd@...ts.infradead.org,
        Richard Weinberger <richard@....at>, linux-xfs@...r.kernel.org
Subject: Re: [PATCH v2 00/16] Allow readpage to return a locked page

On Fri, Oct 09, 2020 at 03:30:48PM +0100, Matthew Wilcox (Oracle) wrote:
> Ideally all filesystems would return from ->readpage with the page
> Uptodate and Locked, but it's a bit painful to convert all the
> asynchronous readpage implementations to synchronous.  The first 14
> filesystems converted are already synchronous.  The last two patches
> convert iomap to synchronous readpage.

Is it really that bad?  It seems like a lot of the remainig file systems
use the generic mpage/buffer/nobh helpers.

But I guess this series is a good first step.