Re: Giantless VFS.

From: Peter Holm (peter_at_holm.cc)
Date: 11/30/04

  • Next message: Michiel Boland: "bash/readline coredumps"
    Date: Tue, 30 Nov 2004 08:56:02 +0100
    To: Jeff Roberson <jroberson@chesapeake.net>
    
    

    On Tue, Nov 30, 2004 at 01:39:01AM -0500, Jeff Roberson wrote:
    >
    > On Tue, 23 Nov 2004, Peter Holm wrote:
    >
    > > On Mon, Nov 22, 2004 at 06:46:50AM -0500, Jeff Roberson wrote:
    > > > On Mon, 22 Nov 2004, Ivan Voras wrote:
    > > >
    > > > > Jeff Roberson wrote:
    > > > >
    > > > > > The short description:
    > > > > > This patch removes Giant from the read(), write(), and fstat() syscalls,
    > > > > > as well as page faults, and bufdone (io interrupts) when using FFS. It
    > > > >
    > > > > What is the plan re: RELENG_5? Will things like this (giantless vm, fs)
    > > > > be merged into it?
    > > >
    > > > The giantless vm was already merged back to RELENG_5 and enabled on amd64,
    > > > and i386. I hope to merge the giantless vfs back after a month or so of
    > > > no problems on -current. I hope to commit it to -current this week.
    > > >
    > > > I haven't received any feedback from the list though. I hope people are
    > > > testing it. Perhaps the silence indicates universal success? :-)
    > > >
    > >
    > > Here's a problem I ran into during stress test:
    > >
    > > http://www.holm.cc/stress/log/jeff01.html
    > >
    > > Let me know if you need more gdb output.
    >
    > Thanks, this is the most serious bug of the couple that were reported. It
    > indicates a possible race to flush a buffer. I'm still looking for this.
    > What steps did you take to produce this panic?
    >

    I ran my kernel stress test: http://www.holm.cc/stress/src/stress.tgz
    I stopped using your patch after the two reported problems.
    Let me know if you would like me to perform more testing with your patch.

    - Peter

    > >
    > > - Peter
    > >
    > > > > _______________________________________________
    > > > > freebsd-current@freebsd.org mailing list
    > > > > http://lists.freebsd.org/mailman/listinfo/freebsd-current
    > > > > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
    > > > >
    > > > _______________________________________________
    > > > freebsd-current@freebsd.org mailing list
    > > > http://lists.freebsd.org/mailman/listinfo/freebsd-current
    > > > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
    > >

    -- 
    Peter Holm
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