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powerpc: Update page-in counter for CMM

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A new field has been added to the VPA as a method for the client OS to
communicate to firmware the number of page-ins it is performing when
running collaborative memory overcommit.  The hypervisor will use this
information to better determine if a partition is experiencing memory
pressure and needs more memory allocated to it.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Brian King
2008-10-22 05:53:45 +00:00
committed by Paul Mackerras
parent 1ef8014deb
commit 409001948d
3 changed files with 13 additions and 3 deletions
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arch/powerpc/include/asm/lppaca.h
+2 -1
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@@ -133,7 +133,8 @@ struct lppaca {
//=============================================================================
// CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data
//=============================================================================
u8 pmc_save_area[256]; // PMC interrupt Area x00-xFF
u32 page_ins; // CMO Hint - # page ins by OS x00-x04
u8 pmc_save_area[252]; // PMC interrupt Area x04-xFF
} __attribute__((__aligned__(0x400)));
extern struct lppaca lppaca[];