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SubjectRe: [RFC][PATCH 6/8] mm: handle_speculative_fault()
On Thu, 7 Jan 2010 10:36:52 -0600 (CST)
Christoph Lameter <cl@linux-foundation.org> wrote:

> On Thu, 7 Jan 2010, Linus Torvalds wrote:
>
> > You're missing what Arjan said - the jav workload does a lot of
> > memory allocations too, causing mmap/munmap.
>
> Well isnt that tunable on the app level? Get bigger chunks of memory
> in order to reduce the frequency of mmap operations? If you want
> concurrency of faults then mmap_sem write locking currently needs to
> be limited.

if an app has to change because our kernel sucks (for no good reason),
"change the app" really is the lame type of answer.


--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org


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