From: Andrea Arcangeli <andrea@suse.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Andrew Morton <akpm@zip.com.au>,
Alexander Viro <viro@math.psu.edu>,
torrey.hoffman@myrio.com, linux-kernel@vger.kernel.org,
Marcelo Tosatti <marcelo@conectiva.com.br>,
"Stephen C. Tweedie" <sct@redhat.com>
Subject: Re: ramdisk corruption problems - was: RE: pivot_root and initrdkern el panic woes
Date: Mon, 31 Dec 2001 02:00:09 +0100 [thread overview]
Message-ID: <20011231020009.R1356@athlon.random> (raw)
In-Reply-To: <20011231012825.P1356@athlon.random> <Pine.LNX.4.33.0112301634510.1011-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.33.0112301634510.1011-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Sun, Dec 30, 2001 at 04:35:46PM -0800
On Sun, Dec 30, 2001 at 04:35:46PM -0800, Linus Torvalds wrote:
>
> On Mon, 31 Dec 2001, Andrea Arcangeli wrote:
> >
> > actually bh_new is needed also to serialize with the buffercache, a new
> > bh mapped in pagecache must be dropped from the buffercache before we
> > can start using it (unmap_underlying_metadata).
>
> You're right, although it's something of an optimization (ie we could as
> well just depend on the "mapped" bit and watch it change).
we could even hold the optimization (cache coherency only on new blocks)
by pushing the cache coherency into the lowlevel just like the bh
clearing, but the current buffer_new branch in the library code seems
clean (and potentially a little faster with big softblocksize due the
partial clearing).
Andrea
next prev parent reply other threads:[~2001-12-31 1:00 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-20 19:06 ramdisk corruption problems - was: RE: pivot_root and initrd kern el panic woes Torrey Hoffman
2001-12-20 19:46 ` Linus Torvalds
2001-12-20 22:56 ` Alexander Viro
2001-12-20 23:42 ` Andrea Arcangeli
2001-12-21 1:49 ` Andrea Arcangeli
[not found] ` <3C22CF16.C78B1F19@zip.com.au>
2001-12-29 15:40 ` Andrea Arcangeli
2001-12-30 6:19 ` Andrew Morton
2001-12-30 6:33 ` Alexander Viro
2001-12-30 6:38 ` Andrew Morton
2001-12-30 7:17 ` Alexander Viro
2001-12-30 10:15 ` ramdisk corruption problems - was: RE: pivot_root and initrd Alan Cox
2001-12-31 0:08 ` ramdisk corruption problems - was: RE: pivot_root and initrd kern el panic woes Andrea Arcangeli
2001-12-30 7:08 ` Andrew Morton
2001-12-30 7:29 ` Alexander Viro
2001-12-30 7:59 ` ramdisk corruption problems - was: RE: pivot_root and initrdkern " Andrew Morton
2001-12-30 17:40 ` Linus Torvalds
2001-12-31 0:28 ` Andrea Arcangeli
2001-12-31 0:35 ` Linus Torvalds
2001-12-31 1:00 ` Andrea Arcangeli [this message]
2001-12-31 0:05 ` ramdisk corruption problems - was: RE: pivot_root and initrd kern " Andrea Arcangeli
2002-01-05 11:43 ` Andrew Morton
2002-01-05 14:04 ` Trond Myklebust
2002-01-07 3:08 ` Andrea Arcangeli
2002-01-07 3:49 ` Andrew Morton
2002-01-07 4:31 ` Andrea Arcangeli
2001-12-30 23:56 ` Andrea Arcangeli
2001-12-31 10:06 ` Daniel Phillips
2002-01-04 16:38 ` Stephen C. Tweedie
2002-01-05 7:53 ` Andrew Morton
2002-01-07 1:08 ` Andrea Arcangeli
2001-12-21 1:38 ` Tachino Nobuhiro
2001-12-21 1:51 ` Everyone else but TWO Andre Hedrick
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