diff options
| author | Brian King <brking@linux.vnet.ibm.com> | 2008-10-22 05:53:45 +0000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-11-05 22:08:28 +1100 |
| commit | 409001948d9f221c94a61c3ee96de112755fc04d (patch) | |
| tree | 2f49e6f0df22721f16e2a68baf94573a923bdda4 /arch/powerpc/mm/fault.c | |
| parent | 1ef8014debb6410ed1960c4477d0006df11157c1 (diff) | |
powerpc: Update page-in counter for CMM
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>
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 565b7a237c84..b18bc0f023c8 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -30,6 +30,7 @@ #include <linux/kprobes.h> #include <linux/kdebug.h> +#include <asm/firmware.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/mmu.h> @@ -318,9 +319,16 @@ good_area: goto do_sigbus; BUG(); } - if (ret & VM_FAULT_MAJOR) + if (ret & VM_FAULT_MAJOR) { current->maj_flt++; - else +#ifdef CONFIG_PPC_SMLPAR + if (firmware_has_feature(FW_FEATURE_CMO)) { + preempt_disable(); + get_lppaca()->page_ins++; + preempt_enable(); + } +#endif + } else current->min_flt++; up_read(&mm->mmap_sem); return 0; |