linux/arch
Chen, Kenneth W 0e5c9f39f6 [PATCH] remove hugetlb_clean_stale_pgtable() and fix huge_pte_alloc()
I don't think we need to call hugetlb_clean_stale_pgtable() anymore
in 2.6.13 because of the rework with free_pgtables().  It now collect
all the pte page at the time of munmap.  It used to only collect page
table pages when entire one pgd can be freed and left with staled pte
pages.  Not anymore with 2.6.13.  This function will never be called
and We should turn it into a BUG_ON.

I also spotted two problems here, not Adam's fault :-)
(1) in huge_pte_alloc(), it looks like a bug to me that pud is not
    checked before calling pmd_alloc()
(2) in hugetlb_clean_stale_pgtable(), it also missed a call to
    pmd_free_tlb.  I think a tlb flush is required to flush the mapping
    for the page table itself when we clear out the pmd pointing to a
    pte page.  However, since hugetlb_clean_stale_pgtable() is never
    called, so it won't trigger the bug.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-05 00:05:46 -07:00
..
alpha [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
arm [ARM] Fix ARMv6 page table bits 2005-09-01 22:41:55 +01:00
arm26 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
cris [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
frv [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
h8300 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
i386 [PATCH] remove hugetlb_clean_stale_pgtable() and fix huge_pte_alloc() 2005-09-05 00:05:46 -07:00
ia64 [IA64] uncached allocator: use generic (not sn2 specific) functions 2005-08-31 14:18:04 -07:00
m32r [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
m68k It wasn't just x86-64 that had hardcoded VM_FAULT_xxx numbers 2005-08-04 08:33:38 -07:00
m68knommu [PATCH] m68knommu: update defconfig for m68knommu 2005-09-02 00:57:30 -07:00
mips [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
parisc [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
ppc [PATCH] ppc: L2 cache prefetch fixes on 745x 2005-09-01 10:52:29 -07:00
ppc64 [PATCH] SPARSEMEM EXTREME 2005-09-05 00:05:38 -07:00
s390 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
sh [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
sh64 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
sparc [SPARC]: remove use of asm/segment.h 2005-08-29 12:45:44 -07:00
sparc64 [SPARC64]: More fully work around Spitfire Errata 51. 2005-08-29 12:46:22 -07:00
um [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
v850 [PATCH] v850: Add show_mem 2005-09-02 00:57:31 -07:00
x86_64 [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
xtensa [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00