Date: Wed, 27 Apr 2005 21:37:24 +0200 From: Marc Olzheim <marcolz@stack.nl> To: Brian Fundakowski Feldman <green@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: [5.3Rp6] UFS buffer cache deadlock (was: NFS client/buffer cache deadlock) Message-ID: <20050427193724.GF6256@stack.nl> In-Reply-To: <20050427081746.GA66441@stack.nl> References: <16998.36437.809896.936800@khavrinen.csail.mit.edu> <20050420173859.GA99695@stack.nl> <20050426140701.GB5789@green.homeunix.org> <20050426151751.GB68038@stack.nl> <20050426155043.GC5789@green.homeunix.org> <20050426160609.GA68511@stack.nl> <20050426162549.GD5789@green.homeunix.org> <20050426164346.GA68763@stack.nl> <20050426193602.GE5789@green.homeunix.org> <20050427081746.GA66441@stack.nl>
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--DWg365Y4B18r8evw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 27, 2005 at 10:17:46AM +0200, Marc Olzheim wrote: > > > Btw. running the writev program with 20 * 100 MB on UFS on a 512MB > > > FreeBSD 6-CURRENT system practicly locks the filesystem down _and_ > > > causes all processes to be swapped out in favor of the buffer cache. > > > 'top' however, doesnt' show a rise in BUF usage. > > >=20 > > > On FreeBSD 4.x, the system performance as usual during the writev to > > > UFS. > >=20 > > That's certainly not very optimal. I don't know anything about it, sor= ry. >=20 > No problem. I just thought that they might be related (this is with a > single writev() as well). Hmm, doing the 20 * 100MB on a 5.3-RELEASE-p6 system with 256 MB memory and 512MB swap (on UFS) hangs the machine. Luckily, I cannot reproduce it on 5.4-STABLE :-/ Marc --DWg365Y4B18r8evw Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCb+n0ezjnobFOgrERAjfpAJwMkKcClojLtm+gej0IWx3sCoHO4wCgvKUC L24XgWIUMEzBzwYsxWy3JEE= =6P/V -----END PGP SIGNATURE----- --DWg365Y4B18r8evw--
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