Date: Fri, 30 Jun 2006 11:56:00 -0700 From: "Kip Macy" <kip.macy@gmail.com> To: "Hans Petter Selasky" <hselasky@c2i.net> Cc: freebsd-hackers@freebsd.org Subject: Re: contiguous memory allocation problem Message-ID: <b1fa29170606301156l61ab935lc9baca62598f503a@mail.gmail.com> In-Reply-To: <200606302029.28563.hselasky@c2i.net> References: <200605271102.19799.hselasky@c2i.net> <200606021556.00231.hselasky@c2i.net> <200606131939.23799.hselasky@c2i.net> <200606302029.28563.hselasky@c2i.net>
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FreeBSD's strategy for doing page coloring makes contiguous memory allocation much past boot quite difficult. This will change when generalized superpage support is brought in (I hope in the near future). -Kip On 6/30/06, Hans Petter Selasky <hselasky@c2i.net> wrote: > Hi, > > I sometimes see that the USB driver is unable to allocate contiguous memory > for itself. For example I noticed that FreeBSD was unable to allocate > 350kbytes of contiguous memory after that I had run "konqueror", the KDE web > browser and various other memory consuming applications for a while. > > I am thinking about pre-allocating some memory for USB, but isn't that the job > of bus-dma, which the USB system uses for memory allocation? > > The machine in question is running FreeBSD 7-current from April. > > Any comments? > > Thanks, > --HPS > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >
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