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SubjectRe: mmap over nfs leads to excessive system load
--- Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
> OK, please back out the patch that I sent you, and try this one instead.
With jumbo frames, the profile is even happier:
(throughput is a little higher and CPU usage is a little lower too)

samples % symbol name
74463 12.1129 skb_copy_bits
30351 4.9372 __lookup_tag
24520 3.9887 _spin_lock
20353 3.3108 _spin_lock_irqsave
19306 3.1405 __copy_from_user_ll
15393 2.5040 __copy_user_zeroing_intel
10014 1.6290 isolate_lru_pages
9002 1.4644 sub_preempt_count
7997 1.3009 debug_smp_processor_id
7691 1.2511 schedule
6999 1.1385 shrink_list
6699 1.0897 tcp_sendmsg
6669 1.0848 radix_tree_delete
6532 1.0626 _write_lock_irqsave
6413 1.0432 __mod_page_state
6170 1.0037 acpi_safe_halt

Again... this is excellent.
So will this make 2.6.16? or can this be called a bug fix for 2.6.15?

-Kenny




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