Messages in this thread | | | From | Hoang-Nam Nguyen <> | Subject | [PATCH 2.6.21 0/8] ehca: remove use of do_mmap() from kernel space and minor cleanup | Date | Thu, 11 Jan 2007 18:07:08 +0100 |
| |
Hello Roland and Christoph H.! Here is a set of patches for ehca, whose main purpose is to remove unproper use of do_mmap() in ehca kernel space as suggested by Christoph H. Other "small" changes are: * Remove "dead" prototype declarations (those without code implementation) * Use SLAB_ defines instead GFP_ ones when allocating memory from slab cache
Actually I should separate those patches for more clarity. Unfortunately that code cleanup above has been incorporated much earlier in our repository, and I had not paid attention on when I started to rework the mmap() stuff. Sorry for this inconvenience!
Now more detail on mmap() rework: - For eHCA hardware register block we use remap_pfn_range() as previously. - For queue pages we call pattern vm_insert_page() to register each allocated kernel page. - For each mmap-ed resource (hardware register block, send/recv and completion queue) we introduce a use counter that is incremented and decremented by the call-backs open()/close(). Destroying a completion queue or queue pair will succeed only if all associated counters are zero. That means those resources must be mmap-ed resp. munmap-ed properly by user space.
Thanks Nam - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |