Messages in this thread | | | From | (Linus Torvalds) | Subject | Re: [2.3.11=pre6]: No OOPS, but mount segfaults remounting "/"? | Date | 21 Jul 1999 17:12:15 GMT |
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In article <Pine.HPP.4.10.9907210954001.24496-100000@iacs5.ucsd.edu>, Benjamin Redelings I <bredelin@ucsd.edu> wrote: >I have UP PPro. 2.3.11-pre6 works great... seems significantly smoother >than pre5 somehow. However, when 'mount -n -o remount,rw /' is called on >bootup, the command succeeds, but segfaults. > >If I run this command AFTER '/' is already mounted read-write, then no >segfault occurs.
pre-6 has some bugs still in handling the lazy TLB switching, and it can result in bad things happening with shared mappings etc. It's fairly hard to trigger, so it doesn't happen for some people at all: it's a race where certain timings have to go just right.
pre-7 fixes that particular bug, although it still has a theoretical problem with some other (even more unlikely) usage patterns.
I'm working on a pre-8 right now, but in the meantime pre-7 is the way to go (I bet that the problem in pre-7 is basically impossible to trigger unless you really design for it). There may be problems we don't even know about, so testing is good.
Linus
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