Aneesh Kumar K.V
56eecdb912
mm: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit ...
Archs like ppc64 doesn't do tlb flush in set_pte/pmd functions when using
a hash table MMU for various reasons (the flush is handled as part of
the PTE modification when necessary).
ppc64 thus doesn't implement flush_tlb_range for hash based MMUs.
Additionally ppc64 require the tlb flushing to be batched within ptl locks.
The reason to do that is to ensure that the hash page table is in sync with
linux page table.
We track the hpte index in linux pte and if we clear them without flushing
hash and drop the ptl lock, we can have another cpu update the pte and can
end up with duplicate entry in the hash table, which is fatal.
We also want to keep set_pte_at simpler by not requiring them to do hash
flush for performance reason. We do that by assuming that set_pte_at() is
never *ever* called on a PTE that is already valid.
This was the case until the NUMA code went in which broke that assumption.
Fix that by introducing a new pair of helpers to set _PAGE_NUMA in a
way similar to ptep/pmdp_set_wrprotect(), with a generic implementation
using set_pte_at() and a powerpc specific one using the appropriate
mechanism needed to keep the hash table in sync.
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-02-17 11:19:36 +11:00
bitops/find: clarify and extend documentation
2013-11-13 12:09:22 +09:00
asm-generic: move cmpxchg*_local defs to cmpxchg.h
2013-03-13 06:11:05 +01:00
audit: Modify a set of system calls in audit class definitions
2014-01-17 17:01:46 -05:00
audit: Modify a set of system calls in audit class definitions
2014-01-17 17:01:46 -05:00
arch: Introduce smp_load_acquire(), smp_store_release()
2014-01-12 10:37:17 +01:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
asm-generic headers: Allow yet more arch overrides in checksum.h
2013-02-11 20:00:33 +05:30
asm-generic: Add default clkdev.h
2012-10-03 21:33:53 +02:00
generic: Use raw local irq variant for generic cmpxchg
2013-02-19 08:43:37 +01:00
asm-generic: move cmpxchg*_local defs to cmpxchg.h
2013-03-13 06:11:05 +01:00
cputime: Generic on-demand virtual cputime accounting
2013-01-27 19:23:27 +01:00
cputime: Move default nsecs_to_cputime() to jiffies based cputime file
2013-01-27 19:23:25 +01:00
cputime_nsecs: use math64.h for nsec resolution conversion helpers
2013-04-26 18:58:12 +02:00
asm-generic/dma-mapping-broken.h: Provide dma_alloc_attrs()/dma_free_attrs()
2012-12-25 20:14:54 +01:00
common: dma-mapping: introduce dma_get_sgtable() function
2012-07-30 12:25:46 +02:00
add generic fixmap.h
2014-01-23 16:36:54 -08:00
GPIO bulk changes for the v3.13 development cycle
2013-11-12 15:50:46 +09:00
lib: hash: follow-up fixups for arch hash
2013-12-19 00:14:53 -05:00
mm: Fix generic hugetlb pte check return type.
2013-10-02 20:02:35 -04:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
kernel: Fix s390 absolute memory access for /dev/mem
2013-05-22 09:45:57 +02:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
UAPI: Set up uapi/asm/Kbuild.asm
2012-10-02 18:01:56 +01:00
KVM: add kvm_para_available to asm-generic/kvm_para.h
2013-06-05 13:21:29 +03:00
__page_to_pfn: Fix typo in comment
2013-10-14 15:28:29 +02:00
asm-generic/mmu.h: Add support for FDPIC
2012-12-09 23:14:14 +01:00
Make most arch asm/module.h files use asm-generic/module.h
2012-09-28 14:31:03 +09:30
arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
2013-06-26 12:10:55 +02:00
arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
2013-06-26 12:10:55 +02:00
arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
2013-06-26 12:10:55 +02:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
include: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
mm: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit
2014-02-17 11:19:36 +11:00
sched: Remove PREEMPT_NEED_RESCHED from generic code
2013-12-11 15:52:32 +01:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
vmlinux.lds: add comments for global variables and clean up useless declarations
2013-07-03 16:07:34 -07:00
constify copy_siginfo_to_user{,32}()
2013-11-09 00:16:29 -05:00
unify default ptrace_signal_deliver
2012-11-29 00:01:23 -05:00
crypto: create generic version of ablk_helper
2013-09-24 06:02:24 +10:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
burying unused conditionals
2013-02-14 09:21:15 -05:00
UAPI: (Scripted) Disintegrate include/asm-generic
2012-10-04 18:20:15 +01:00
Fix TLB gather virtual address range invalidation corner cases
2013-08-16 08:52:46 -07:00
tracing,x86: Add a TSC trace_clock
2012-11-13 15:48:27 -05:00
asm-generic: uaccess: Spelling s/a ny/any/
2014-01-02 10:45:23 +01:00
We get rid of the general module prefix confusion with a binary config option,
2013-05-05 10:58:06 -07:00
kernel: add support for init_array constructors
2013-10-17 15:05:17 +10:30
include/asm-generic/vtime.h: avoid zero-length file
2013-09-30 14:31:02 -07:00
word-at-a-time: provide generic big-endian zero_bytemask implementation
2013-12-12 10:39:01 -08:00
asm-generic: xor: mark static functions as __maybe_unused
2012-10-03 21:21:06 +02:00
56eecdb912