Date: Tue, 4 Mar 1997 19:00:02 -0800 (PST) From: David Greenman <dg@root.com> To: freebsd-bugs Subject: Re: kern/2875: vinvalbuf() clobbers b_vnbufs chain Message-ID: <199703050300.TAA15482@freefall.freebsd.org>
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The following reply was made to PR kern/2875; it has been noted by GNATS.
From: David Greenman <dg@root.com>
To: KATO Takenori <kato@eclogite.eps.nagoya-u.ac.jp>
Cc: FreeBSD-gnats-submit@FreeBSD.org
Subject: Re: kern/2875: vinvalbuf() clobbers b_vnbufs chain
Date: Tue, 04 Mar 1997 18:54:04 -0800
>From: David Greenman <dg@root.com>
>Subject: Re: kern/2875: vinvalbuf() clobbers b_vnbufs chain
>Date: Tue, 04 Mar 1997 12:21:09 -0800
>
>> Hmmm, the fix seems overly complicated. How about this instead:
>
>Your fix inhibit disk I/O interruption for more long time. If this
>is not a problem, I prefer your fix.
I don't think it's a problem. The actual delay is fairly low in practice
(probably less than 50us), and letting an interrupt through prior to the
check for v_numoutput/tsleep isn't likely going to be of benefit (I/O due
to the sync operations would not likely have completed yet). John is welcome
to correct me if he thinks I'm in error...
-DG
David Greenman
Core-team/Principal Architect, The FreeBSD Project
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