Author: ambrisko
Date: Fri May 27 19:23:15 2016
New Revision: 300866
URL: https://svnweb.freebsd.org/changeset/base/300866
Log:
If the I/O offset and length is multiple of the media size then
directly pass the request otherwise use a buffer that is a
multiple of the media size. This speeds up I/O quite a bit
when using large transfer sizes on 4Kn disks etc.
MFC after: 1 week
Modified:
head/sys/boot/efi/libefi/efipart.c
Modified: head/sys/boot/efi/libefi/efipart.c
==============================================================================
--- head/sys/boot/efi/libefi/efipart.c Fri May 27 19:15:45 2016
(r300865)
+++ head/sys/boot/efi/libefi/efipart.c Fri May 27 19:23:15 2016
(r300866)
@@ -325,11 +325,14 @@ efipart_realstrategy(void *devdata, int
if (rsize != NULL)
*rsize = size;
- if (blkio->Media->BlockSize == 512)
- return (efipart_readwrite(blkio, rw, blk, size / 512, buf));
+ if ((size % blkio->Media->BlockSize == 0) &&
+ ((blk * 512) % blkio->Media->BlockSize == 0))
+ return (efipart_readwrite(blkio, rw,
+ blk * 512 / blkio->Media->BlockSize,
+ size / blkio->Media->BlockSize, buf));
/*
- * The block size of the media is not 512B per sector.
+ * The block size of the media is not a multiple of I/O.
*/
blkbuf = malloc(blkio->Media->BlockSize);
if (blkbuf == NULL)
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