[ trimmed the cc ]
On 6/26/07, Satyam Sharma <[email protected]> wrote:
Hi Dan,
[ Minor thing ... ]
Not a problem, thanks for taking a look...
On 6/27/07, Dan Williams <[email protected]> wrote:
> The async_tx api tries to use a dma engine for an operation, but will fall
> back to an optimized software routine otherwise. Xor support is
> implemented using the raid5 xor routines. For organizational purposes this
> routine is moved to a common area.
This isn't quite crypto code and isn't connected to or through the cryptoapi
(at least not in this patchset), so I somehow find it misplaced in the crypto/
directory. If all its users are in drivers/md/ then that would be a
better place.
If it is something kernel-global, lib/ sounds more appropriate?
True, it isn't quite crypto code, but I gravitated to this location because:
1/ the models are similar, both are general purpose apis with a driver component
2/ there are already some algorithms in the crypto layer that are not
strictly cryptographic like crc32c, and other checksums
3/ having the code under that directory is a reminder to consider
closer integration when adding support for more complex algorithms
like raid6 p+q (at what point does a 'dma-offload' engine become a
'crypto' engine? at some point they converge)
The hope is that other subsystems beyond md could benefit from offload
engines. For example, the crc32c calculations in btrfs might be a
good candidate, and kcopyd integration has crossed my mind.
Satyam
Dan
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