Date: Sat, 20 Mar 2010 14:38:18 -0500 From: Alan Cox <alan.l.cox@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org>, freebsd-arch@freebsd.org Subject: Re: Increasing MAXPHYS Message-ID: <ca3526251003201238w7edeea6ah4032d868c284bccb@mail.gmail.com> In-Reply-To: <4BA4E7A9.3070502@FreeBSD.org> References: <4BA4E7A9.3070502@FreeBSD.org>
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2010/3/20 Alexander Motin <mav@freebsd.org> > Hi. > > With set of changes done to ATA, CAM and GEOM subsystems last time we > may now get use for increased MAXPHYS (maximum physical I/O size) kernel > constant from 128K to some bigger value. [snip] > All above I have successfully tested last months with MAXPHYS of 1MB on > i386 and amd64 platforms. > > So my questions are: > - does somebody know any issues denying increasing MAXPHYS in HEAD? > - are there any specific opinions about value? 512K, 1MB, MD? > > For now, I think it should machine-dependent. The virtual memory system should have no problems with MAXPHYS of 1MB on amd64 and ia64. Alan
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