Ingo Molnar wrote:
>
> On Thu, 7 Feb 2002, Andrew Morton wrote:
>
> > Quite a few. Significant ones. pagemap_lru_lock and lru_list_lock
> > come to mind.
>
> ugh. Are you sure we want to *sleep* with something like pagemap_lru_lock
> held?
Not guilty :) I was answering rml's question.
I suspect lru_list_lock is the shining example. We often
take it for very short periods and occasionally take it
for enormous periods.
> That pretty much brings all pagecache related operations to a
> grinding halt.
yup. We'd go into a sheduling storm until we find the process
which holds the lock.
> I think complex spinlocked sections should be simplified
> rather.
yes.
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This archive was generated by hypermail 2b29 : Thu Feb 07 2002 - 21:01:05 EST