Date: Wed, 21 Aug 2013 17:32:52 +0200 From: Andre Oppermann <andre@freebsd.org> To: Peter Grehan <grehan@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Navdeep Parhar <np@FreeBSD.org> Subject: Re: svn commit: r254520 - in head/sys: kern sys Message-ID: <5214DDA4.4010504@freebsd.org> In-Reply-To: <5214D6CA.2040405@freebsd.org> References: <201308191116.r7JBGsc6065793@svn.freebsd.org> <521256CE.6070706@FreeBSD.org> <5212870A.50105@freebsd.org> <521291F1.8060500@FreeBSD.org> <5214D5E0.9040002@freebsd.org> <5214D6CA.2040405@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 21.08.2013 17:03, Peter Grehan wrote: >> The way to go should be 4K clusters as they are native to the architecture. >> IIRC a PCIe DMA can't cross a 4K boundary anyway > > That's a 4G boundary, for some devices. I meant a single PCIe DMA transaction can be at most 4K before it has to set up another one? -- Andre
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5214DDA4.4010504>