Date: Thu, 14 Sep 1995 20:49:34 +0200 (MET DST) From: Ollivier Robert <roberto@keltia.Freenix.FR> To: jehamby@lightside.com (Jake Hamby) Cc: current@freebsd.org Subject: Re: Finding solve to severe sig11 problem: Message-ID: <199509141849.UAA26870@keltia.Freenix.FR> In-Reply-To: <Pine.BSF.3.91.950913233555.9447A-100000@localhost> from "Jake Hamby" at Sep 13, 95 11:40:41 pm
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It seems that Jake Hamby said:
> plan is to slowly step forward and see exactly which patch in which file
> is causing the Sig 11 problem in my case. If I can isolate this problem
> to a single patch, I will then apply all the subsequent CTM deltas and
> reverse that one patch. If all goes well, I'll post a diff to the list.
As David said, the patches are related and the one that cause the sig11
will not be easely pointed out. Here are the patches you'll have to look
for if you want to try anyway:
Even with that, it will probably be hard to find because (a wild guess) it
is either a long-time-well-hidden bug discovered by some new way to do
things or a new bug. My knowledge on VM stuff is unfortunately slim :-(
dyson 95/09/03 12:56:16
Modified: sys/kern vfs_bio.c vfs_cluster.c
Log:
Improvements to the cluster code, minor vfs_bio efficiency:
Better performance -- more aggressive read-ahead
under certain circumstanses.
Mods to support clustering on small
( < PAGE_SIZE) block size filesystems (e.g. ext2fs,
msdosfs.)
dyson 95/09/03 12:57:26
Modified: sys/vm vm_page.c
Log:
New subroutine "vm_page_set_validclean" for a vfs_bio improvement.
dyson 95/09/03 13:11:29
Modified: sys/vm vm_page.h
Log:
Added prototype for new routine "vm_page_set_validclean" and initial
declarations for the prezeroed pages mechanism.
dyson 95/09/03 13:32:53
Modified: sys/kern vfs_cluster.c
Log:
VOP_BMAP will eventually need an additional argument, but not yet. This
backs out that modification to minimize the window during which this
is not yet correct.
dyson 95/09/03 13:39:23
Modified: sys/i386/i386 swtch.s vm_machdep.c
Log:
Machine dependent routines to support pre-zeroed free pages. This
significantly improves demand zero performance.
dyson 95/09/03 13:40:44
Modified: sys/vm vm_kern.c vm_fault.c vm_page.c
Log:
Machine independent changes to support pre-zeroed free pages. This
significantly improves demand-zero performance.
dyson 95/09/03 21:44:28
Modified: sys/vm swap_pager.c vnode_pager.c vm_fault.c
Log:
Allow the fault code to use additional clustering info from both
bmap and the swap pager. Improved fault clustering performance.
--
Ollivier ROBERT -=- The daemon is FREE! -=- roberto@keltia.frmug.fr.net
FreeBSD keltia.Freenix.FR 2.2-CURRENT #1: Sun Sep 10 18:50:19 MET DST 1995
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