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Date: Fri, 17 Jan 2020 16:39:08 +0000 From: David Howells <dhowells@...hat.com> To: Omar Sandoval <osandov@...ndov.com> Cc: dhowells@...hat.com, Colin Walters <walters@...bum.org>, Al Viro <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org, Christoph Hellwig <hch@....de>, Theodore Ts'o <tytso@....edu>, adilger.kernel@...ger.ca, "Darrick J. Wong" <darrick.wong@...cle.com>, Chris Mason <clm@...com>, josef@...icpanda.com, dsterba@...e.com, linux-ext4 <linux-ext4@...r.kernel.org>, xfs <linux-xfs@...r.kernel.org>, linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: Making linkat() able to overwrite the target Omar Sandoval <osandov@...ndov.com> wrote: > Yes I still have those patches lying around and I'd be happy to dust > them off and resend them. That would be great if you could. I could use them here: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=fscache-iter I'm performing invalidation by creating a vfs_tmpfile() and then replacing the on-disk file whilst letting ops resume on the temporary file. Replacing the on-disk file currently, however, involves unlinking the old one before I can link in a new one - which leaves a window in which nothing is there. I could use one or more side dirs in which to create new files and rename them over, but that has potential lock bottleneck issues - and is particularly fun if an entire volume is invalidated (e.g. AFS vos release). David
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