Date: Fri, 10 Dec 2010 17:57:47 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Andriy Gapon <avg@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Where userland read/write requests, whcih is larger than MAXPHYS, are splitted? Message-ID: <4D024DFB.4030902@FreeBSD.org> In-Reply-To: <4D024A53.7010600@freebsd.org> References: <mailpost.1291988544.5326917.42118.mailing.freebsd.hackers@FreeBSD.cs.nctu.edu.tw> <4D023D00.10301@FreeBSD.org> <4D024A53.7010600@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Andriy Gapon wrote: > on 10/12/2010 16:45 Alexander Motin said the following: >> by default. Many SCSI drivers still limited by DFLTPHYS - 64K. > > Including the cases where MAXBSIZE is abused because it historically has the same > value. DFLTPHYS automatically assumed by CAM for all SIMs not reporting their maximal I/O size. All drivers using MAXBSIZE most likely will fall into this category, because this functionality was added just at 8.0. -- Alexander Motin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4D024DFB.4030902>