On Fri, 12 Jan 2007 11:46:22 -0800 (PST)
Christoph Lameter [off-list ref] wrote:

quoted

While the softlockups and the like went away by enabling interrupts during
spinning, as mentioned in http://lkml.org/lkml/2007/1/3/29 ,
Andi thought maybe this is exposing a problem with zone->lru_locks and 
hence warrants a discussion on lkml, hence this post.  Are there any 
plans/patches/ideas to address the spin time under such extreme conditions?

Could this be a hardware problem? Some issue with atomic ops in the 
Sun hardware?

I'd assume so.  We don't hold lru_lock for 33 seconds ;)

Probably similar symptoms are demonstrable using other locks, if a
suitable workload is chosen.

Increasing PAGEVEC_SIZE might help.  But we do allocate those things
on the stack.

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