Messages in this thread | | | From | Eric Munson <> | Subject | [RFC] [PATCH 0/5 V2] Huge page backed user-space stacks | Date | Mon, 28 Jul 2008 12:17:10 -0700 |
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Certain workloads benefit if their data or text segments are backed by huge pages. The stack is no exception to this rule but there is no mechanism currently that allows the backing of a stack reliably with huge pages. Doing this from userspace is excessively messy and has some awkward restrictions. Particularly on POWER where 256MB of address space gets wasted if the stack is setup there.
This patch stack introduces a personality flag that indicates the kernel should setup the stack as a hugetlbfs-backed region. A userspace utility may set this flag then exec a process whose stack is to be backed by hugetlb pages.
Eric Munson (5): Align stack boundaries based on personality Add shared and reservation control to hugetlb_file_setup Split boundary checking from body of do_munmap Build hugetlb backed process stacks [PPC] Setup stack memory segment for hugetlb pages
arch/powerpc/mm/hugetlbpage.c | 6 + arch/powerpc/mm/slice.c | 11 ++ fs/exec.c | 209 ++++++++++++++++++++++++++++++++++++++--- fs/hugetlbfs/inode.c | 52 +++++++---- include/asm-powerpc/hugetlb.h | 3 + include/linux/hugetlb.h | 22 ++++- include/linux/mm.h | 1 + include/linux/personality.h | 3 + ipc/shm.c | 2 +- mm/mmap.c | 11 ++- 10 files changed, 284 insertions(+), 36 deletions(-)
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