ChangeSet 1.2199.14.28, 2005/03/23 12:09:27-08:00, [EMAIL PROTECTED]
[CRYPTO]: Optimise kmap calls in crypt()
Perform kmap once (or twice if the buffer is not aligned correctly)
per page in crypt() instead of the current code which does it once
per block. Consequently it will yield once per page instead of once
per block.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
cipher.c | 18 +++++++++++-------
1 files changed, 11 insertions(+), 7 deletions(-)
diff -Nru a/crypto/cipher.c b/crypto/cipher.c
--- a/crypto/cipher.c 2005-03-26 17:23:38 -08:00
+++ b/crypto/cipher.c 2005-03-26 17:23:38 -08:00
@@ -117,17 +117,21 @@
in_place = scatterwalk_samebuf(&walk_in, &walk_out);
- src_p = prepare_src(&walk_in, bsize, tmp_src, in_place);
- dst_p = prepare_dst(&walk_out, bsize, tmp_dst, in_place);
+ do {
+ src_p = prepare_src(&walk_in, bsize, tmp_src,
+ in_place);
+ dst_p = prepare_dst(&walk_out, bsize, tmp_dst,
+ in_place);
- nbytes -= bsize;
+ prfn(tfm, dst_p, src_p, crfn, enc, info);
- prfn(tfm, dst_p, src_p, crfn, enc, info);
+ complete_src(&walk_in, bsize, src_p, in_place);
+ complete_dst(&walk_out, bsize, dst_p, in_place);
- complete_src(&walk_in, bsize, src_p, in_place);
- scatterwalk_done(&walk_in, 0, nbytes);
+ nbytes -= bsize;
+ } while (nbytes && !scatterwalk_across_pages(&walk_in, bsize));
- complete_dst(&walk_out, bsize, dst_p, in_place);
+ scatterwalk_done(&walk_in, 0, nbytes);
scatterwalk_done(&walk_out, 1, nbytes);
if (!nbytes)
-
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