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    SubjectRe: 2.6.16-rc1-mm4 i386 atomic operations broken on SMP (in modules at least)
    On Thursday February 2, jamagallon@able.es wrote:
    > On Thu, 2 Feb 2006 12:50:19 +1100, Neil Brown <neilb@suse.de> wrote:
    >
    > > On Thursday February 2, jamagallon@able.es wrote:
    > > > On Thu, 2 Feb 2006 12:19:22 +1100, Neil Brown <neilb@suse.de> wrote:
    > > >
    > > > >
    > > > > I've been testing md/raid in 2.6.16-rc1-mm4 on a dual Xeon with most
    > > > > of the md personalities compiled as modules, and weird stuff if
    > > > > happening.
    > > > >
    > > > > In particular I'm getting lots of
    > > > >
    > > > > BUG: atomic counter underflow at:
    > > > >
    > > > > reports in raid10 and raid5, which are modules.
    > > > >
    > > > >
    > > >
    > > > I also run this kernel (plus a couple patches) on a SATA raid5 setup, and
    > > > had no problems. People throws and gets files via SMB/AFP, mainly.
    > > >
    > > > My box is dual PIII@933.
    > >
    > > Is 'raid5' a module, or is it compiled in?
    > >
    >
    > nada:/usr/src/linux# grep _MD_ .config
    > CONFIG_MD_LINEAR=y
    > CONFIG_MD_RAID0=y
    > CONFIG_MD_RAID1=y
    > CONFIG_MD_RAID10=y
    > CONFIG_MD_RAID5=y

    I see it's not a module.
    That points pretty strongly to the module loading code then I guess.

    Thanks,
    NeilBrown
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