Date: Thu, 15 Sep 2005 17:39:17 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: 'swap_pager: indefinite wait buffer' with swapfile Message-ID: <20050915213917.GC26998@xor.obsecurity.org> In-Reply-To: <200509132200.j8DM0fHI005530@apollo.backplane.com> References: <20050911075157.GA93947@xor.obsecurity.org> <200509132200.j8DM0fHI005530@apollo.backplane.com>
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--96YOpH+ONegL0A3E Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 13, 2005 at 03:00:41PM -0700, Matthew Dillon wrote: >=20 > : > : > :--bp/iNruPH9dso1Pn > :Content-Type: text/plain; charset=3Dus-ascii > :Content-Disposition: inline > : > :I configured a vnode-backed md and enabled swapping on it. A few > :hours later after moderate swap use the console showed: > : > :swap_pager: indefinite wait buffer: bufobj: 0, blkno: 889347, size: 8192 > :[...repeated...] > : > :The backing store was a sparse file, but there was ample space: >=20 > This is likely your problem. Do NOT use a sparse file for file-backed > swap. Unfortunately making the file non-sparse did not cure the deadlock. Since it's a heavily loaded 14-processor machine it's difficult to trace every process to look for activity out of the ordinary. Kris --96YOpH+ONegL0A3E Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDKeoEWry0BWjoQKURAsKrAJ0aGSJHU+KkhBwgPK2TWqZA51i9IACfbwvi sC0ddiLlJqv3pE8FVnGxANM= =D01R -----END PGP SIGNATURE----- --96YOpH+ONegL0A3E--
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