[hello world. my first mail kernelnewbies] i am following a trail of high-memory initialization on a MIPS32 based system. i came across inode initialization. i'd like to know why page(s) for inodes are allocated with GFP_HIGHUSER & not with GFP_USER mask? is there any particular need that the address_space be set with GFP_HIGHUSER flag? (ref: http://lxr.free-electrons.com/source/fs/inode.c#150) (ref: http://lxr.free-electrons.com/source/include/linux/pagemap.h#031) i intend to allocate highmem pages strictly to user processes. my idea is to completely avoid kernel mapping for these pages. so, as a dirty hack - i changed mapping_set_gfp_mask function not to honor __GFP_HIGHMEM zone selector if __GFP_IO | __GFP_FS are set. in short i replace GFP_HIGHUSER with GFP_USER mask. with this change the kernel comes to life. but i am still confused about the effect of this change on system, that i am yet to see? any help in this regards will be greatly appreciated. thanks in advance. girish. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
