Date: 16 Oct 2001 18:38:33 +0200 From: Dag-Erling Smorgrav <des@ofug.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Bruce Evans <bde@zeta.org.au>, <cvs-committers@FreeBSD.ORG>, <cvs-all@FreeBSD.ORG> Subject: Re: cvs commit: src/sys/vm vnode_pager.c Message-ID: <xzpr8s3wnee.fsf@flood.ping.uio.no> In-Reply-To: <200110161629.f9GGTju31481@apollo.backplane.com> References: <200110161629.f9GGTju31481@apollo.backplane.com>
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Matthew Dillon <dillon@apollo.backplane.com> writes: > ffs_sync() in -current is doing a lot of mutex operations > in the loop. If you have various -current mutex debugging > options turned on, even the default ones I think, this could > be responsible for the latency you are experiencing. Each > scan loop is doing four mutex ops. So, what changed in the witness code to make it so slow (or in the FFS code to make it perform so many mutex operations) around late June / early July? DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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