Date: Mon, 29 Sep 1997 03:13:57 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: phk@critter.freebsd.dk (Poul-Henning Kamp) Cc: Tor.Egge@idi.ntnu.no, freebsd-bugs@FreeBSD.ORG Subject: Re: kern/4630: buffer_map might become corrupted Message-ID: <199709290813.DAA05524@dyson.iquest.net> In-Reply-To: <242.875515605@critter.freebsd.dk> from Poul-Henning Kamp at "Sep 29, 97 08:46:45 am"
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Poul-Henning Kamp said: > > > This means that both vm_map_entry_dispose and vm_map_entry_create might > > be called in an interrupt context, manipulating buffer_map and the free > > pool of vm map entries. > > I think the problem here is calling brelse() at interrupt time, isn't it ? > The problem is that brelse isn't meant to be called to free the buffer at interrupt time. Brelse can be called at interrupt time under certain circumstances. Geesh, I hate those layered drivers (like CCD and VN.) Both of them need to be looked at. We need to look at a way of handling this type of problem without just sprinkling SPL's around. -- John dyson@freebsd.org jdyson@nc.comhelp
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