Re: 2.6.16-rc1-mm4 i386 atomic operations broken on SMP (in modules at least)

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On Thu, 2 Feb 2006 12:50:19 +1100, Neil Brown <[email protected]> wrote:

> On Thursday February 2, [email protected] wrote:
> > On Thu, 2 Feb 2006 12:19:22 +1100, Neil Brown <[email protected]> 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
CONFIG_MD_RAID6=y
CONFIG_MD_MULTIPATH=m
# CONFIG_MD_FAULTY is not set

nada:/usr/src/linux# lsmod
Module                  Size  Used by
w83627hf               22512  0 
hwmon_vid               2016  1 w83627hf
i2c_isa                 3392  1 w83627hf
i2c_viapro              7188  0 
i2c_core               16640  3 w83627hf,i2c_isa,i2c_viapro
snd_ens1371            18656  0 
snd_rawmidi            17312  1 snd_ens1371
snd_ac97_codec         87744  1 snd_ens1371
snd_ac97_bus            1760  1 snd_ac97_codec
snd_pcm                72772  2 snd_ens1371,snd_ac97_codec
snd_timer              18724  1 snd_pcm
snd_page_alloc          7784  1 snd_pcm
snd                    38104  5 snd_ens1371,snd_rawmidi,snd_ac97_codec,snd_pcm,snd_timer
e100                   31620  0 
ide_cd                 35264  0 
loop                   11816  0 
via82cxxx               8132  0 [permanent]
ide_core              109844  2 ide_cd,via82cxxx
via_agp                 7584  1 
agpgart                25352  1 via_agp
microcode               5592  0 
sata_promise            8868  7 
libata                 63956  1 sata_promise
uhci_hcd               20044  0 
sg                     20984  0 
st                     34880  0 
sr_mod                 14020  0 
cdrom                  34320  2 ide_cd,sr_mod

nada:/usr/src/linux# grep BUG /var/log/syslog
nada:/usr/src/linux# grep BUG /var/log/messages
nada:/usr/src/linux# 

;)

--
J.A. Magallon <jamagallon()able!es>     \               Software is like sex:
werewolf!able!es                         \         It's better when it's free
Mandriva Linux release 2006.1 (Cooker) for i586
Linux 2.6.15-jam7 (gcc 4.0.2 (4.0.2-1mdk for Mandriva Linux release 2006.1))

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