Messages in this thread | | | From | Hoang-Nam Nguyen <> | Subject | [PATCH/RFC 2.6.21 0/5] ehca: remove use of do_mmap() from kernel space | Date | Thu, 11 Jan 2007 20:07:33 +0100 |
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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)
Now 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 and munmap-ed properly in user space. The actual calls of mmap64() and munmap() are done then in ehca user space lib, ie. libehca, for which I will send a separate patch for another review (by ofed group).
Thanks Nam
ehca_classes.h | 29 +----- ehca_cq.c | 65 +++----------- ehca_iverbs.h | 10 -- ehca_main.c | 6 - ehca_qp.c | 78 +++-------------- ehca_uverbs.c | 253 ++++++++++++++++++--------------------------------------- 6 files changed, 121 insertions(+), 320 deletions(-) - 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/
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