From: David Howells <dhowells@redhat.com>
To: Steve French <smfrench@gmail.com>
Cc: dhowells@redhat.com,
Linus Torvalds <torvalds@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Christoph Hellwig <hch@lst.de>, Jeff Layton <jlayton@redhat.com>,
Dave Wysochanski <dwysocha@redhat.com>,
Trond Myklebust <trondmy@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Steve French <sfrench@samba.org>,
Eric Van Hensbergen <ericvh@gmail.com>,
linux-cachefs@redhat.com, linux-afs@lists.infradead.org,
linux-nfs <linux-nfs@vger.kernel.org>,
CIFS <linux-cifs@vger.kernel.org>,
ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] fscache rewrite -- please drop for now
Date: Mon, 10 Aug 2020 16:48:08 +0100 [thread overview]
Message-ID: <672169.1597074488@warthog.procyon.org.uk> (raw)
In-Reply-To: <CAH2r5msKipj1exNUDaSUN7h0pjanOenhSg2=EWYMv_h15yKtxg@mail.gmail.com>
Steve French <smfrench@gmail.com> wrote:
> cifs.ko also can set rsize quite small (even 1K for example, although
> that will be more than 10x slower than the default 4MB so hopefully no
> one is crazy enough to do that).
You can set rsize < PAGE_SIZE?
> I can't imagine an SMB3 server negotiating an rsize or wsize smaller than
> 64K in today's world (and typical is 1MB to 8MB) but the user can specify a
> much smaller rsize on mount. If 64K is an adequate minimum, we could change
> the cifs mount option parsing to require a certain minimum rsize if fscache
> is selected.
I've borrowed the 256K granule size used by various AFS implementations for
the moment. A 512-byte xattr can thus hold a bitmap covering 1G of file
space.
David
next prev parent reply other threads:[~2020-08-10 15:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 11:51 Upcoming: fscache rewrite David Howells
2020-07-30 12:16 ` Matthew Wilcox
2020-07-30 12:36 ` David Howells
2020-07-30 13:08 ` Jeff Layton
2020-08-03 16:30 ` [GIT PULL] " David Howells
2020-08-10 15:16 ` [GIT PULL] fscache rewrite -- please drop for now David Howells
2020-08-10 15:34 ` Steve French
2020-08-10 15:48 ` David Howells [this message]
2020-08-10 16:09 ` Steve French
2020-08-10 16:35 ` David Wysochanski
2020-08-10 17:06 ` Jeff Layton
2020-08-17 19:07 ` Steven French
2020-08-10 16:40 ` Christoph Hellwig
2020-08-27 15:28 ` David Howells
2020-08-27 16:18 ` Dominique Martinet
2020-08-27 17:14 ` David Howells
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