Date: Wed, 27 Feb 2002 09:47:24 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: peter@FreeBSD.ORG, current@FreeBSD.ORG Subject: Re: you broke current in some weird way... etc Message-ID: <200202271747.g1RHlOD27988@apollo.backplane.com> References: <95075.1014756753@critter.freebsd.dk> <200202271733.g1RHXmh27846@apollo.backplane.com> <3C7D1A14.C3390B6C@mindspring.com>
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:Matthew Dillon wrote:
:> :date: 2002/02/27 09:51:32; author: peter; state: Exp; lines: +245 -191
:> :Back out all the pmap related stuff I've touched over the last few days.
:> :There is some unresolved badness that has been eluding me, particularly
:> :affecting uniprocessor kernels. Turning off PG_G helped (which is a bad
:> :sign) but didn't solve it entirely. Userland programs still crashed.
:>
:> I'm just going to use this opportunity to plug the concept of temporary
:> sysctl-instrumentation for a commit like this.
:
:Overall, this is a good idea. However, it can't apply to
:any code that runs before init_main.c runs the SI_SUB_TUNABLES.
:
:-- Terry
Sure it does, because it means you can simply commit a change to the
default assignment for that sysctl rather then backing the whole thing
out to unbreak the general developer community. That saves a lot of
time and removes the 'oh hell, I have to track this down quickly!'
pressure.
Sometimes features in early boot can be adjusted by breaking into DDB
and w/l changing the sysctl variable, but perhaps not in this case.
-Matt
Matthew Dillon
<dillon@backplane.com>
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