Hi Fujita, ________________________________________ >From: FUJITA Tomonori [fujita.tomonori@xxxxxxxxxxxxx] >Sent: Thursday, August 26, 2010 1:55 AM >To: Guzman Lugo, Fernando >Cc: linux-omap@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; ohad@xxxxxxxxxx; hiroshi.doyu@xxxxxxxxx; ameya.palande@xxxxxxxxx; felipe.contreras@xxxxxxxxx >Subject: Re: [PATCH 8/9] dspbridge: add map support for big buffers > >On Wed, 30 Jun 2010 19:20:59 -0500 >Fernando Guzman Lugo <x0095840@xxxxxx> wrote: > >> due to a restriction in scatter gather lists, it can >> not be created a list for a buffer bigger than 1MB. >> This patch is spliting big mappings into 1MB mappings. > >I don't read the whole thread but the above description is incorrect. > >Why can't you use scatter gather chaining? You can create a scatter >list for a buffer larger than 1MB. The thing is that ARM architecture does not support SG chaining. This patch should be seen like a workaround until it is fixed in iovmm module. Thanks and regards, Fernando. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
