linux-kernel - Re: [PATCH v4 06/27] fs: check for writeback errors after syncing out buffers in generic_file

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Message-ID: <20170510124836.GA1590@bombadil.infradead.org>
Date:   Wed, 10 May 2017 05:48:36 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Jeff Layton <jlayton@...hat.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-mm@...ck.org, jfs-discussion@...ts.sourceforge.net,
        linux-xfs@...r.kernel.org, cluster-devel@...hat.com,
        linux-f2fs-devel@...ts.sourceforge.net,
        v9fs-developer@...ts.sourceforge.net, linux-nilfs@...r.kernel.org,
        linux-block@...r.kernel.org, dhowells@...hat.com,
        akpm@...ux-foundation.org, hch@...radead.org,
        ross.zwisler@...ux.intel.com, mawilcox@...rosoft.com,
        jack@...e.com, viro@...iv.linux.org.uk, corbet@....net,
        neilb@...e.de, clm@...com, tytso@....edu, axboe@...nel.dk,
        josef@...icpanda.com, hubcap@...ibond.com, rpeterso@...hat.com,
        bo.li.liu@...cle.com
Subject: Re: [PATCH v4 06/27] fs: check for writeback errors after syncing
 out buffers in generic_file_fsync

On Tue, May 09, 2017 at 11:49:09AM -0400, Jeff Layton wrote:
> ext2 currently does a test+clear of the AS_EIO flag, which is
> is problematic for some coming changes.
> 
> What we really need to do instead is call filemap_check_errors
> in __generic_file_fsync after syncing out the buffers. That
> will be sufficient for this case, and help other callers detect
> these errors properly as well.
> 
> With that, we don't need to twiddle it in ext2.
> 
> Suggested-by: Jan Kara <jack@...e.cz>
> Signed-off-by: Jeff Layton <jlayton@...hat.com>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Jan Kara <jack@...e.cz>

Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>