Date: Fri, 27 May 2016 19:23:15 +0000 (UTC) From: Doug Ambrisko <ambrisko@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r300866 - head/sys/boot/efi/libefi Message-ID: <201605271923.u4RJNF0d016635@repo.freebsd.org>
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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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