From mboxrd@z Thu Jan 1 00:00:00 1970 From: mindentropy@gmail.com (mindentropy) Date: Thu, 21 Jul 2011 23:48:05 +0530 Subject: Regarding remap_pfn_page In-Reply-To: References: <201107192326.46034.mindentropy@gmail.com> <201107202359.17118.mindentropy@gmail.com> Message-ID: <201107212348.05234.mindentropy@gmail.com> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org >Sorry to kicks in... Was wondering where you were :) >hm, quite likely you run out of contigous virtual address space that >as big as you requested... in above, you requested 16 MiB, right? Not virtual address space but physical page frames. Yes I requested 16MB. I want a huge chunk for dma for a high bandwidth pcie(16GB/s!) device . I am thinking in terms of no scatter gather but generally any sane device would have one.