Date: Mon, 29 Nov 2004 00:53:23 +0100 From: Christian Brueffer <chris@unixpages.org> To: Jon Noack <noackjr@alumni.rice.edu> Cc: stable@freebsd.org Subject: Re: panic: lock (sleep mutex) inp not locked Message-ID: <20041128235323.GD16796@unixpages.org> In-Reply-To: <41AA607C.80606@alumni.rice.edu> References: <20041128230705.GC16796@unixpages.org> <41AA607C.80606@alumni.rice.edu>
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--at6+YcpfzWZg/htY Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 28, 2004 at 05:34:20PM -0600, Jon Noack wrote: > On 11/28/04 17:07, Christian Brueffer wrote: >=20 > I successfully used polling on my SMP machine a while back, but it=20 > pessimized performance for my workloads so I disabled it. All I did was= =20 > to wrap the SMP error in /sys/kern/kern_poll.c with #ifdef 0...#endif=20 > and everything worked. Worked here as well. I don't think polling actually caused to panic, I'm just mentioning for a full picture. >=20 > In any case, it seems rwatson@ is interested in polling on SMP; check=20 > out his netperf page (http://www.watson.org/~robert/freebsd/netperf/)=20 > for more info. Specifically, the following entry in his 20041103 patch= =20 > is of interest: >=20 > "A mutex to protect device polling state is introduced, pollmtx, and > used to protect the global variables present in kern_poll.c. As a > result, Giant is removed from the polling netisr code, and the > #ifdef causing polling build to fail on SMP is removed. This has > not been tested." >=20 > No idea whether or not it works, but I thought I'd give you a heads up. >=20 I've tested those and I'm actually trying to track down a related panic at the moment (didn't want to bother Robert with it for the moment, he's busy enough :-)). - Christian --=20 Christian Brueffer chris@unixpages.org brueffer@FreeBSD.org GPG Key: http://people.freebsd.org/~brueffer/brueffer.key.asc GPG Fingerprint: A5C8 2099 19FF AACA F41B B29B 6C76 178C A0ED 982D --at6+YcpfzWZg/htY Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBqmTzbHYXjKDtmC0RAvZvAKCV9XEQ7T8jWIE2jhOIuTqlA+UGwwCgnGdj 4Uff+iJ6sFjQ8s4Nf9WTAzY= =BB/+ -----END PGP SIGNATURE----- --at6+YcpfzWZg/htY--
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