s390/mm: zero page cache synonyms for zEC12

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To avoid cache synonyms on System zEC12 32 independent zero pages are
required, one for each combination for bits 2**12 to 2**16 of the virtual
address. To avoid wasting too much memory on small virtual systems the
number of zero pages is limited to 4 if the memory size is less or equal
to 64MB.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Martin Schwidefsky 2013-02-28 11:08:54 +01:00

parent f752ac4d7d

commit 7919e91b34

1 changed files with 9 additions and 1 deletions

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arch/s390/mm/init.c

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