Re: [PATCH] blockgroup_lock: hashed spinlocks for ext2 and ext3
Andrew Morton (akpm@digeo.com)
Mon, 14 Apr 2003 14:58:52 -0700
Andi Kleen <ak@suse.de> wrote:
>
> >
> > And this hashed lock is not a per-cpu thing. (No locks are!) It just uses
> > NR_CPUS to decide how big the hash should be.
>
> Isn't that what the IBM kmalloc_per_cpu() was for ? (I think the patch
> was from Dipankar)
This is not a per-cpu data structure.
It is a hashed spinlock which uses NR_CPUS as a sizing hint.
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