From: Stephen Tweedie <sct@redhat.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] Kernel panic while snapshotting.
Date: Sat, 20 Jan 2001 15:42:43 +0000 [thread overview]
Message-ID: <20010120154243.F2656@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.30.0101190915110.28951-100000@beefcake.hdqt.valinux.com>; from jweber@valinux.com on Fri, Jan 19, 2001 at 09:22:55AM -0800
Hi,
On Fri, Jan 19, 2001 at 09:22:55AM -0800, Jay Weber wrote:
> Are the LockPage() calls necessary?
They are if you are doing kiobuf IO on user virtual addresses, because
the 2.2 VM has no other way to synchronise the IO with the dirty flags
on the page. For non-user-VA pages, it shouldn't matter.
2.4 does not lock pages in kiobufs at all.
--Stephen
next prev parent reply other threads:[~2001-01-20 15:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-19 15:56 [linux-lvm] Kernel panic while snapshotting Jay Weber
2001-01-19 16:06 ` AJ Lewis
2001-01-19 16:37 ` Joe Thornber
2001-01-19 17:22 ` Jay Weber
2001-01-20 15:42 ` Stephen Tweedie [this message]
2001-01-19 16:56 ` Jay Weber
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