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powerpc/pseries: Add page coalescing support

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Adds support for page coalescing, which is a feature on IBM Power servers
which allows for coalescing identical pages between logical partitions.
Hint text pages as coalesce candidates, since they are the most likely
pages to be able to be coalesced between partitions. This patch also
exports some page coalescing statistics available from firmware via
lparcfg.

[BenH: Moved a couple of things around to fix compile problems]

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Brian King
2011-05-04 16:01:20 +10:00
committed by Benjamin Herrenschmidt
parent 7707e4110e
commit 9ee820fa00
8 changed files with 106 additions and 30 deletions
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3
arch/powerpc/include/asm/firmware.h
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@@ -47,6 +47,7 @@
#define FW_FEATURE_BEAT ASM_CONST(0x0000000001000000)
#define FW_FEATURE_CMO ASM_CONST(0x0000000002000000)
#define FW_FEATURE_VPHN ASM_CONST(0x0000000004000000)
#define FW_FEATURE_XCMO ASM_CONST(0x0000000008000000)
#ifndef __ASSEMBLY__
@@ -60,7 +61,7 @@ enum {
FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN |
FW_FEATURE_BULK_REMOVE | FW_FEATURE_XDABR |
FW_FEATURE_MULTITCE | FW_FEATURE_SPLPAR | FW_FEATURE_LPAR |
FW_FEATURE_CMO | FW_FEATURE_VPHN,
FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO,
FW_FEATURE_PSERIES_ALWAYS = 0,
FW_FEATURE_ISERIES_POSSIBLE = FW_FEATURE_ISERIES | FW_FEATURE_LPAR,
FW_FEATURE_ISERIES_ALWAYS = FW_FEATURE_ISERIES | FW_FEATURE_LPAR,