Date: Fri, 19 Feb 1999 03:04:02 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Julian Elischer <julian@whistle.com>, Kirk McKusick <mckusick@McKusick.COM>, Jake <jake@checker.org>, Don Lewis <Don.Lewis@tsc.tdk.com>, current@FreeBSD.ORG Subject: Re: softupdate panic, anyone seen this? (fwd) Message-ID: <199902191104.DAA31781@apollo.backplane.com> References: <Pine.BSF.3.95.990218132053.16922A-100000@current1.whistle.com> <199902191043.CAA31641@apollo.backplane.com>
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: First, a couple of places where the worklist was not being protected
: at splbio(). I'm not 100% sure that this is a problem but the code
: is complex enough that it's just too dangerous not to do it.
Ah... it *can* happen... brelse() can call brelvp() which can manipulate
the dirtyblkhd/cleanblkhd and vn worklists. brelse() can be called from
an interrupt. So, splbio() protection is mandatory.
-Matt
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