Date: Sun, 04 Jul 2010 14:50:38 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Daisuke Aoyama <aoyama@peach.ne.jp> Cc: FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: [Need Help]isboot (iSCSI boot driver) version 0.2.1 Message-ID: <4C30758E.7080102@FreeBSD.org> In-Reply-To: <10CB692CA3FE4A8992B250B7F35B243B@ad.peach.ne.jp> References: <6BC2B2FBAFFA4C26A46977F121B707E1@ad.peach.ne.jp> <mailpost.1278162245.7916753.99842.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw> <4C2F4B67.3060201@FreeBSD.org> <10CB692CA3FE4A8992B250B7F35B243B@ad.peach.ne.jp>
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Daisuke Aoyama wrote: >>> Notes/Known Issues/Limitations: >>> FreeBSD can't use transfer length > 64KB. >> >> Since 8.0 FreeBSD can use any transfer lengths. 64K is a safety limit >> for CAM SIMs that do not report maximum transfer size. If your driver >> supports bigger transactions (and even if not), you should fill maxio >> field in XPT_PATH_INQ response. > > I set maxio=1024*1024 in version 0.2.2. As a result, the request (each ccb) > have 256 blocks (128KB). I don't know why it is 128KB. 128KB is a default MAXPHYS value. You may rise it in your kernel if you want. I am successfully using 1MB MAXPHYS now. -- Alexander Motin
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