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authorDavid Gibson <david@gibson.dropbear.id.au>2008-10-15 22:01:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:29 -0700
commitb4d1d99fdd8b98fb03dfd6ef9b0ece220de38640 (patch)
treee2bdf12aa53b71430edd312f441c79fdd6114535 /scripts
parentdb99100d2ed40dd9736fcb1adb3657a98f9bcfd9 (diff)
hugetlb: handle updating of ACCESSED and DIRTY in hugetlb_fault()
The page fault path for normal pages, if the fault is neither a no-page fault nor a write-protect fault, will update the DIRTY and ACCESSED bits in the page table appropriately. The hugepage fault path, however, does not do this, handling only no-page or write-protect type faults. It assumes that either the ACCESSED and DIRTY bits are irrelevant for hugepages (usually true, since they are never swapped) or that they are handled by the arch code. This is inconvenient for some software-loaded TLB architectures, where the _PAGE_ACCESSED (_PAGE_DIRTY) bits need to be set to enable read (write) access to the page at the TLB miss. This could be worked around in the arch TLB miss code, but the TLB miss fast path can be made simple more easily if the hugetlb_fault() path handles this, as the normal page fault path does. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Adam Litke <agl@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
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