Date: Mon, 20 Dec 1999 12:43:23 +0900 From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> To: vsilyaev@mindspring.com Cc: guido@gvr.org, freebsd-emulation@FreeBSD.ORG, dbutter@wireless.net Subject: Re: VMware: Questions... Message-ID: <ybsaen6wa3o.wl@ett.sat.t.u-tokyo.ac.jp> In-Reply-To: In your message of "Sun, 19 Dec 1999 12:20:17 -0500" <19991219122016.A453@jupiter.delta.ny.us> References: <19991218204438.A706@jupiter.delta.ny.us> <19991219174414.A89114@gvr.gvr.org> <19991219122016.A453@jupiter.delta.ny.us>
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At Sun, 19 Dec 1999 12:20:17 -0500,
Vladimir N. Silyaev <vsilyaev@mindspring.com> wrote:
> > I am seeing the same freezes. I am running NT4 on a virtual drive.
> > From time to time, the NT in vmware freezes. The IDE light on the vmware
> > screen is off, yet there is a tremendous amount of disk activity
> > going on (as seen from iostat or systat -vmstat). I am seeing
> > 100 transaction per second.
> I fill such freezes with linux as guest, but I never seen any disk activity
> in that time. I don't have access to vmware sources or to any other source
> of information, so I don't have any thinks about this freezes.
This is because mmaped file is written every 30 second by sync daemon.
The file is usually named /var/tmp/ram0 but it's unlinked right after
opened so you cannot see it by 'ls' although it exits.
Fortunately, MAP_NOSYNC is available recently. I use the following
patch. It's urgly but simple.
Index: linux_misc.c
===================================================================
RCS file: /pub/FreeBSD-CVS/src/sys/i386/linux/linux_misc.c,v
retrieving revision 1.75
diff -u -r1.75 linux_misc.c
--- linux_misc.c 1999/10/29 18:08:45 1.75
+++ linux_misc.c 1999/12/12 09:21:31
@@ -704,6 +704,10 @@
bsd_args.flags |= MAP_FIXED;
if (linux_args.flags & LINUX_MAP_ANON)
bsd_args.flags |= MAP_ANON;
+#if 1
+ else
+ bsd_args.flags |= MAP_NOSYNC;
+#endif
if (linux_args.flags & LINUX_MAP_GROWSDOWN) {
bsd_args.flags |= MAP_STACK;
/\ Hidetoshi Shimokawa
\/ simokawa@sat.t.u-tokyo.ac.jp
PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp
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