From: David Howells <dhowells@redhat.com>
To: Nick Piggin <npiggin@suse.de>
Cc: dhowells@redhat.com, torvalds@osdl.org,
linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: Should PAGE_CACHE_SIZE be discarded?
Date: Wed, 14 Nov 2007 15:59:39 +0000 [thread overview]
Message-ID: <22558.1195055979@redhat.com> (raw)
In-Reply-To: <20071114152345.GB20973@wotan.suse.de>
Nick Piggin <npiggin@suse.de> wrote:
> Christoph Lameter has patches exactly to make PAGE_CACHE_SIZE larger than
> PAGE_SIZE, and they seem to work without much effort. I happen to hate the
> patches ;) but that doesn't change the fact that PAGE_CACHE_SIZE is
> relatively useful and it is not at all an ill-defined concept.
Where, please? mm kernels?
> Basically, anything that goes in the page cache is in units of
> PAGE_CACHE_SIZE, and nothing else. For filesystems it should be pretty
> easy...
That depends on what the coverage of struct page is. I don't actually know
whether this is PAGE_SIZE or PAGE_CACHE_SIZE; I assumed it to be the former,
but from what you've said, I'm not actually sure.
David
next prev parent reply other threads:[~2007-11-14 15:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-14 13:56 Should PAGE_CACHE_SIZE be discarded? David Howells
2007-11-14 15:23 ` Nick Piggin
2007-11-14 15:59 ` David Howells [this message]
2007-11-14 21:35 ` Nick Piggin
2007-11-15 12:05 ` David Howells
2007-11-15 14:15 ` Benny Halevy
2007-11-15 14:46 ` David Howells
2007-11-15 21:30 ` Nick Piggin
2007-11-15 17:09 ` Jörn Engel
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