Commit-ID: a269cca9926faf8e44b340b017be0d884203141b Gitweb: http://git.kernel.org/tip/a269cca9926faf8e44b340b017be0d884203141b Author: H. Peter Anvin <hpa@xxxxxxxxx> AuthorDate: Mon, 31 Aug 2009 11:17:44 -0700 Committer: H. Peter Anvin <hpa@xxxxxxxxx> CommitDate: Mon, 31 Aug 2009 11:17:44 -0700 mm: remove !NUMA condition from PAGEFLAGS_EXTENDED condition set CONFIG_PAGEFLAGS_EXTENDED disables a trick to conserve pageflags. This trick is indended to be enabled when the pressure on page flags is very high. The previous condition was: - depends on 64BIT || SPARSEMEM_VMEMMAP || !NUMA || !SPARSEMEM ... however, the sparsemem code already has a way to crowd out the node number from the pageflags, which means that !NUMA actually doesn't contribute to hard pageflags exhaustion. This is required for the new PG_uncached flag to not cause pageflags exhaustion on x86_32 + PAE + SPARSEMEM + !NUMA. Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx> LKML-Reference: <4A9828F4.4040905@xxxxxxxxx> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx> Cc: Suresh Siddha <suresh.siddha@xxxxxxxxx> --- mm/Kconfig | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index c948d4c..fe221c7 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -153,7 +153,7 @@ config MEMORY_HOTREMOVE # config PAGEFLAGS_EXTENDED def_bool y - depends on 64BIT || SPARSEMEM_VMEMMAP || !NUMA || !SPARSEMEM + depends on 64BIT || SPARSEMEM_VMEMMAP || !SPARSEMEM # Heavily threaded applications may benefit from splitting the mm-wide # page_table_lock, so that faults on different parts of the user address -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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