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Date:   Tue, 13 Apr 2021 19:19:58 -0400
To:     Trond Myklebust <trondmy@hammerspace.com>
Cc:     linux-nfs@vger.kernel.org, Olga Kornievskaia <kolga@netapp.com>
Subject: generic/430 COPY/delegation caching regression
Message-ID: <20210413231958.GB31058@fieldses.org>
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From:   bfields@fieldses.org (J. Bruce Fields)
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List-ID: <linux-nfs.vger.kernel.org>
X-Mailing-List: linux-nfs@vger.kernel.org

generic/430 started failing in 4.12-rc3, as of 7c1d1dcc24b3 "nfsd: grant
read delegations to clients holding writes".

Looks like that reintroduced the problem fixed by 16abd2a0c124 "NFSv4.2:
fix client's attribute cache management for copy_file_range": the client
needs to invalidate its cache of the destination of a copy even when it
holds a delegation.

--b.