--- Trond Myklebust <[email protected]> wrote:
>
> Is this NFSv2?
>
> Cheers,
> Trond
>
This is reproducible with O_DIRECT, but not without.
The profile looks the same:
samples % symbol name
647042 28.4114 zap_pte_range
572195 25.1249 unmap_mapping_range
324291 14.2395 _spin_lock
139259 6.1148 __bitmap_weight
137048 6.0177 zap_page_range
104614 4.5936 unmap_mapping_range_vma
63406 2.7841 debug_smp_processor_id
48906 2.1474 sub_preempt_count
46090 2.0238 unmap_vmas
27966 1.2280 add_preempt_count
23224 1.0198 invalidate_inode_pages2_range
21676 0.9518 unmap_page_range
17825 0.7827 _spin_unlock
I've had mixed results with a local ext3 file with the same test. One run had a 37 second delay
while crossing 4GB, another happily went by without incident.
-Kenny
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