On Thu, 3 May 2007 09:46:32 +0100 (BST) Hugh Dickins <[email protected]> wrote:
> On Thu, 3 May 2007, Andrew Morton wrote:
> > On Wed, 2 May 2007 10:25:47 -0700 (PDT) Christoph Lameter <[email protected]> wrote:
> >
> > > +config ARCH_USES_SLAB_PAGE_STRUCT
> > > + bool
> > > + default y
> > > + depends on SPLIT_PTLOCK_CPUS <= NR_CPUS
> > > +
> >
> > That all seems to work as intended.
> >
> > However with NR_CPUS=8 SPLIT_PTLOCK_CPUS=4, enabling SLUB=y crashes the
> > machine early in boot.
>
> I thought that if that worked as intended, you wouldn't even
> get the chance to choose SLUB=y? That was how it was working
> for me (but I realize I didn't try more than make oldconfig).
Right. This can be tested on x86 without a cross-compiler:
ARCH=powerpc make mrproper
ARCH=powerpc make fooconfig
> >
> > Too early for netconsole, no serial console. Wedges up uselessly with
> > CONFIG_XMON=n, does mysterious repeated uncontrollable exceptions with
> > CONFIG_XMON=y. This is all fairly typical for a powerpc/G5 crash :(
> >
> > However I was able to glimpse some stuff as it flew past. Crash started in
> > flush_old_exec and ended in pgtable_free_tlb -> kmem_cache_free. I don't know
> > how to do better than that I'm afraid, unless I'm to hunt down a PCIE serial
> > card, perhaps.
>
> That sounds like what happens when SLUB's pagestruct use meets
> SPLIT_PTLOCK's pagestruct use. Does your .config really show
> CONFIG_SLUB=y together with CONFIG_ARCH_USES_SLAB_PAGE_STRUCT=y?
>
Nope.
g5:/usr/src/25> grep SLUB .config
CONFIG_SLUB=y
g5:/usr/src/25> grep SLAB .config
# CONFIG_SLAB is not set
g5:/usr/src/25> grep CPUS .config
CONFIG_NR_CPUS=8
# CONFIG_CPUSETS is not set
# CONFIG_IRQ_ALL_CPUS is not set
CONFIG_SPLIT_PTLOCK_CPUS=4
It's in http://userweb.kernel.org/~akpm/config-g5.txt
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
