Date: Tue, 19 May 1998 22:28:07 +0200 From: Philippe Regnauld <regnauld@deepo.prosa.dk> To: Jason Nordwick <nordwick@scam.xcf.berkeley.edu> Cc: freebsd-current@FreeBSD.ORG Subject: Re: softupdates and mount options... Message-ID: <19980519222807.29531@deepo.prosa.dk> In-Reply-To: <35610C6B.5ED4201@scam.xcf.berkeley.edu>; from Jason Nordwick on Mon, May 18, 1998 at 09:36:59PM -0700 References: <35610C6B.5ED4201@scam.xcf.berkeley.edu>
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Jason Nordwick writes:
> I never told the system (through fstab), to mount sync or async.
> I added softupdates today and put sync under the mount options
> just to be safe, but now it appears to actually make the system
> slower ? Is this because the system default to async ?
Ok, let's get this clear:
1.new kernel, latest sources, latest softupdates
on P5-133 x 2 / 7880 UW onboard Adaptec, 4Gb UW.
Note: /tmp and /pub were mounted async.
NOT /usr/src. i.e.:
/pub async only
/tmp async only
/usr/src softupdates only
- make -j4 buildworld. 3 minutes -> PANIC
2.I reboot, fsck^H^H^Hnewfs /usr/src & untar a clean
source backup
- I mount everything "normal" (no sync, no async
specified), but /usr/src is softupdate'd:
make -j4 buildworld.
It's been running for 40 minutes so far. No glitch.
Observations:
It looks like mounting async _other_ FS'es
than a softupdate one still causes panics --
this wasn't explicit in the last messages.
AHC_TAGENABLE and AHC_ALLOWMEMIO no good for me
(SCB lockups, couldn't even break into the debugger).
--
-[ Philippe Regnauld / sysadmin / regnauld@deepo.prosa.dk / +55.4N +11.3E ]-
«Pluto placed his bad dog at the entrance of Hades to keep the dead
IN and the living OUT! The archetypical corporate firewall?»
- S. Kelly Bootle
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