On Thu, May 26, 2005 at 10:23:55PM +0300, Eli Cohen wrote: > I'm afraid that won't solve the problem. From some reason the vma of such a > region is flagged with VM_IO and that's why get_user_pages() will fail. We > need to find another way to get the physical address of such memory.
Sorry - why do you need the physical address of memory? Did you mean you need the DMA address? grant > One > thing I can think of is implementing something similar to follow_page(). Or > better if the kernel will export follow_page(). > > -----Original Message----- > From: Roland Dreier [mailto:[EMAIL PROTECTED] > Sent: Thursday, May 26, 2005 10:09 PM > To: Eli Cohen > Cc: Michael S. Tsirkin; openib-general@openib.org > Subject: Re: registering read-only memory > > > OK, I think I understand the problem. The compiler puts a string > defined with "const char *foo" on a read-only page, but in > uverbs_mem.c we always pass write=1 to get_user_pages(). I need to > fix the code so that it only asks for writeable pages if we're > registering with writable permissions. > > - R. > _______________________________________________ > openib-general mailing list > openib-general@openib.org > http://openib.org/mailman/listinfo/openib-general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
