Commit a269cca9926faf8e44b340b017be0d884203141b
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47d25003cb
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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@zytor.com> LKML-Reference: <4A9828F4.4040905@zytor.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Suresh Siddha <suresh.siddha@intel.com>
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
mm/Kconfig
| ... | ... | @@ -153,7 +153,7 @@ |
| 153 | 153 | # |
| 154 | 154 | config PAGEFLAGS_EXTENDED |
| 155 | 155 | def_bool y |
| 156 | - depends on 64BIT || SPARSEMEM_VMEMMAP || !NUMA || !SPARSEMEM | |
| 156 | + depends on 64BIT || SPARSEMEM_VMEMMAP || !SPARSEMEM | |
| 157 | 157 | |
| 158 | 158 | # Heavily threaded applications may benefit from splitting the mm-wide |
| 159 | 159 | # page_table_lock, so that faults on different parts of the user address |