Date: Tue, 24 May 2005 15:14:54 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Matthias Buelow <mkb@incubus.de> Cc: Mike Jakubik <mikej@rogers.com>, Max Laier <max@love2party.net>, freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches) Message-ID: <20050524221454.GA56421@xor.obsecurity.org> In-Reply-To: <4293A18F.6080200@incubus.de> References: <3248.172.16.0.199.1116876092.squirrel@172.16.0.1> <20050523211307.GA36552@xor.obsecurity.org> <42924949.1070902@incubus.de> <200505242141.38289.max@love2party.net> <42938C2E.6020301@incubus.de> <20050524201942.GA28257@xor.obsecurity.org> <42938D40.1050502@incubus.de> <20050524202647.GA28322@xor.obsecurity.org> <4293A18F.6080200@incubus.de>
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--5vNYLRcllDrimb99 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, May 24, 2005 at 11:50:07PM +0200, Matthias Buelow wrote: > Kris Kennaway wrote: >=20 > >>Hmm... atapci1 is shared with fxp0 on irq 20.. does fxp0 also require > >>the giant lock? > > > >I don't think so..but the shared interrupt might still be causing some > >other problem. Try compiling a kernel without fxp support and see if > >you still have the interactive problems under disk load. >=20 > Ok, I now have tried a) with HTT switched off in BIOS, b) with HTT off > and without the fxp driver (so that atapci1 is the only driver on irq > 20) and c) on a Compaq notebook, all machines running 5.4-stable. > Basically, the problem occurs in all 3 scenarios. OK, thanks for confirming. The next step is for you to try 6.0 with debug.mpsafevfs=3D1 on a machine that exhibits the problem under 5.4, so we can test whether the problem is caused by VFS being under Giant on 5.4. Kris --5vNYLRcllDrimb99 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCk6deWry0BWjoQKURAuOUAKDHiQRnSMFZu2oTmACL6705o5g+BQCfXUT5 RMBAOaqtK2XrZ7TqEy6V0gQ= =5XEk -----END PGP SIGNATURE----- --5vNYLRcllDrimb99--
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