From: Christoph Hellwig <hch@infradead.org>
To: "Theodore Ts'o" <tytso@mit.edu>,
Jakob Oestergaard <jakob@unthought.net>,
"Stephen C. Tweedie" <sct@redhat.com>,
linux-kernel@vger.kernel.org, Andrew Morton <akpm@zip.com.au>
Subject: Re: jbd bug(s) (?)
Date: Thu, 26 Sep 2002 15:41:59 +0100 [thread overview]
Message-ID: <20020926154158.A19151@infradead.org> (raw)
In-Reply-To: <20020926142504.GC9400@think.thunk.org>; from tytso@mit.edu on Thu, Sep 26, 2002 at 10:25:04AM -0400
On Thu, Sep 26, 2002 at 10:25:04AM -0400, Theodore Ts'o wrote:
> My mistake. At one point I was talking to Mark Lord and I had gotten
^^^ Stephen Lord
> the impression they had some Irix-VM-to-Linux-VM mapping layer which
> would make blocksize > PAGE_SIZE possible.
The pagebuf layer presents and inferface similar enough to the IRIX
buffercache to XFS and is layered ontop of the Linux pagecache. Today
it's only used for metadata and allows mapping of > PAGE_CACHE_SIZE
objects there (see the vmap/vunmap code I added to vmalloc.c in 2.5
for that). But it's not used for data I/O at all anymore and it would
also have problems for blocksize > PAGE_CACHE_SIZE.
prev parent reply other threads:[~2002-09-26 14:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-24 7:21 jbd bug(s) (?) Jakob Oestergaard
2002-09-25 16:36 ` Stephen C. Tweedie
2002-09-26 12:21 ` Jakob Oestergaard
2002-09-26 12:27 ` Stephen C. Tweedie
2002-09-26 12:56 ` Jakob Oestergaard
2002-09-26 13:44 ` Theodore Ts'o
2002-09-26 14:05 ` Christoph Hellwig
2002-09-26 14:25 ` Theodore Ts'o
2002-09-26 14:41 ` Christoph Hellwig [this message]
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