Re: [BUG] long freezes on thinkpad t60

[Miklos Szeredi]

> To test this theory, could you try the patch below, does this fix your 
> hangs too?

Not tried yet, but obviously it does, since it's a superset of the
previous fix.  I could try without the smb_mb(), but see below.

> This change causes the memory access of the "easy" spin-loop portion
> to be more agressive: after the REP; NOP we'd not do the 'easy-loop'
> with a simple CMPB, but we'd re-attempt the atomic op.

It looks as if this is going to overflow of the lock counter, no?

Miklos
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