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If the I/O offset and length is multiple of the media size then

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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
This commit is contained in:
Doug Ambrisko 2016-05-27 19:23:15 +00:00
parent 56ce06907c
commit 9c8f0619db
1 changed files with 6 additions and 3 deletions
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9
sys/boot/efi/libefi/efipart.c
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@ -325,11 +325,14 @@ efipart_realstrategy(void *devdata, int rw, daddr_t blk, size_t offset,
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)