Date: Wed, 23 Jun 2004 10:36:52 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Alan Cox <alc@cs.rice.edu> Cc: Bruce M Simpson <bms@FreeBSD.org> Subject: Re: kern/67898: page fault while in kernel mode Message-ID: <15673.1087979812@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 23 Jun 2004 03:28:22 CDT." <20040623082822.GM18577@cs.rice.edu>
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In message <20040623082822.GM18577@cs.rice.edu>, Alan Cox writes: >On Wed, Jun 23, 2004 at 07:00:23AM +0000, Bruce M Simpson wrote: >> Synopsis: page fault while in kernel mode >> >> Responsible-Changed-From-To: freebsd-bugs->alc >> Responsible-Changed-By: bms >> Responsible-Changed-When: Wed Jun 23 07:00:07 GMT 2004 >> Responsible-Changed-Why: >> One for alc@, he was here recently >> >> http://www.freebsd.org/cgi/query-pr.cgi?pr=67898 > >This should actually go to phk@. The problem here appears to be that >the geomified swap strategy routines are no longer setting b_dev >(except to NULL in swapdev_strategy()). Consequently, devtoname() >dereferences a NULL pointer. > >I can imagine a quick fix, but Poul may have better ideas. I don't really have a good idea. The devtoname() is patently invalid in the face of paging to NFS so I guess we'd have to stick a name string in swdevt and print that if we don't just remove the devtoname() entirely. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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