On 07/16/2009 01:38 PM, H. Peter Anvin wrote:
Dan Williams wrote:
On Mon, Jul 13, 2009 at 7:11 AM, David Woodhouse<dwmw2@xxxxxxxxxxxxx>
wrote:
We'll want to use these in btrfs too.
Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx>
Do you suspect that btrfs will also want to perform these operations
asynchronously? I am preparing an updated release of the raid6
offload patch kit, but the previous WIP release can be browsed at:
http://git.kernel.org/?p=linux/kernel/git/djbw/async_tx.git;a=shortlog;h=raid6
The routines are housed in crypto/async_tx/async_pq.c and
crypto/async_tx/async_raid6_recov.c.
I also wonder if the raid6 algos are a better fit under crypto/
alongside xor?
I am also sitting on a set of synchronous (CPU) acceleration patches
for RAID-6 recovery, just waiting for the APIs to stabilize.
-hpa
Worth sharing a pointer to a really neat set of papers that describe
open source friendly RAID6 and erasure encoding algorithms that were
presented last year and this at FAST:
http://www.cs.utk.edu/~plank/plank/papers/papers.html
If I remember correctly, James Plank's papers also have implemented and
benchmarked the various encodings,
Ric
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