Re: mmap over nfs leads to excessive system load

[Kenny Simpson]

Same test now done w/ rc1-mm2...
similar result.

However, instead of pegging 1 virtual cpu in system time, two virtual CPUs on the same core now
share the 100% load (so each shows 50% load and 50% idle).

Oprofile shows:

5610635  66.9136  zap_pte_range
711147    8.4813  _raw_spin_trylock
498282    5.9426  unmap_mapping_range
196369    2.3419  add_preempt_count
126243    1.5056  unmap_page_range
111791    1.3332  __bitmap_weight
96284     1.1483  page_address
88998     1.0614  _raw_spin_unlock

And I'm attaching the sysrq dump

-Kenny


		
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Attachment: sysrq
Description: 3794922530-sysrq