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.
Send instant messages to your online friends http://au.messenger.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |