netdev - Re: 9p EBADF with cache enabled (Was: 9p fs-cache tests/benchmark (was: 9p fscache Duplicate cookie detected))

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Date:   Thu, 21 Apr 2022 11:36:12 +0100
From:   David Howells <dhowells@...hat.com>
To:     asmadeus@...ewreck.org
Cc:     dhowells@...hat.com,
        Christian Schoenebeck <linux_oss@...debyte.com>,
        David Kahurani <k.kahurani@...il.com>, davem@...emloft.net,
        ericvh@...il.com, kuba@...nel.org, linux-kernel@...r.kernel.org,
        lucho@...kov.net, netdev@...r.kernel.org,
        v9fs-developer@...ts.sourceforge.net, Greg Kurz <groug@...d.org>
Subject: Re: 9p EBADF with cache enabled (Was: 9p fs-cache tests/benchmark (was: 9p fscache Duplicate cookie detected))

asmadeus@...ewreck.org wrote:

> 	int fd = open(argv[1], O_WRONLY|O_APPEND);
> 	if (fd < 0)
> 		return 1;
> 	if (write(fd, "test\n", 5) < 0)

I think I need to implement the ability to store writes in non-uptodate pages
without needing to read from the server as NFS does.  This may fix the
performance drop also.

David