Messages in this thread | | | Date | Thu, 27 Apr 2006 23:36:06 +1000 | From | Nick Piggin <> | Subject | Re: Lockless page cache test results |
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Jens Axboe wrote: > On Thu, Apr 27 2006, Nick Piggin wrote:
>>Hmm, what's more, find_get_pages_contig shouldn't result in any >>fewer tree_lock acquires than the open coded thing there now >>(for the densely populated pagecache case). > > > How do you figure? The open coded one does a find_get_page() on each > page in that range, so for x number of pages we'll grab and release > ->tree_lock x times.
Yeah you're right. I had in mind that you were using find_get_pages_contig in readahead, rather than in splice.
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