Re: Major regression on hackbench with SLUB (more numbers)

Theodore Tso
2007-12-24T23:38:20Z

On Mon, Dec 24, 2007 at 11:21:14AM -0800, Christoph Lameter wrote:
>
> That is why there is a slabinfo tool that does all the nice formatting.
>
> Do a
>
> gcc -o slabinfo Documentation/vm/slabinfo.c
>
> Then run slabinfo instead of doing cat /proc/slabinfo

So two questions: why isn't -f the default? And is /sys/slab
guaranteed to be a stable and permanent interface if the SLAB
implementation ever gets ripped out? If so, maybe this should go into
util-linux-ng? I am aa bit concerned about the lack of atomicity of
/sys/slab, but this is a heck of a lot better of many kernel drivers
or subsystems which use /sys and the completely punt on any kind of
userspace utility, forcing users to type crazy things like

echo 5 > /sys/bus/pci/drivers/iwl4965/*/power_level

- Ted