|| ||Nick Piggin <email@example.com>|
|| ||Paul McKenney <firstname.lastname@example.org>,
Dipankar Sarma <email@example.com>,
Ingo Molnar <firstname.lastname@example.org>,
|| ||[patch 0/7] lockless pagecache 2|
|| ||Thu, 11 Aug 2005 22:18:09 +1000|
This is my second attempt at a lockless pagecache.
Patches are against 2.6.13-rc6, and have had reasonable
stressing (albeit on small SMPs).
Main changes since last seen:
* Code clarity and commenting improvement.
* Fix race where multiple concurrent failed speculative
reference takers could be confused into thinking a free
page wasn't free, due to the elevated refcounts.
* Convert radix tree node freeing over to RCU. I completely
missed this problem in my first attempt. (My first real
RCU attempt - completely wrong?).
* page_cache_get_speculative previously used only preempt_
disable to stop the current CPU from entering the page
allocator. Needs to turn off interrupts too.
Paul picked this bug up without seeing the code, just a
vague description of what I was trying to do. All I
picked up was my jaw from the ground ;)
SUSE Labs, Novell Inc.
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