diff options
| author | Manish Ahuja <ahuja@austin.ibm.com> | 2008-03-22 10:47:04 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-26 08:44:07 +1100 |
| commit | fd35cff8d285c6ae30c66a70321ebbcd2a4615ec (patch) | |
| tree | 1067d04b1f9553f585434c1091f980b90b5cf0c3 /arch/powerpc | |
| parent | a9c508dae10a821dc95653178eec018abc90482e (diff) | |
[POWERPC] pseries: phyp dump: Tracking memory range freed
This tracks the size freed. For now it does a simple rudimentary
calculation of the ranges freed. The idea is to keep it simple at the
external shell script level and send in large chunks for now.
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/phyp_dump.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/phyp_dump.c b/arch/powerpc/platforms/pseries/phyp_dump.c index df4870ec90d8..034fe1b54dd9 100644 --- a/arch/powerpc/platforms/pseries/phyp_dump.c +++ b/arch/powerpc/platforms/pseries/phyp_dump.c @@ -261,6 +261,39 @@ static void release_memory_range(unsigned long start_pfn, } } +/** + * track_freed_range -- Counts the range being freed. + * Once the counter goes to zero, it re-registers dump for + * future use. + */ +static void +track_freed_range(unsigned long addr, unsigned long length) +{ + static unsigned long scratch_area_size, reserved_area_size; + + if (addr < phyp_dump_info->init_reserve_start) + return; + + if ((addr >= phyp_dump_info->init_reserve_start) && + (addr <= phyp_dump_info->init_reserve_start + + phyp_dump_info->init_reserve_size)) + reserved_area_size += length; + + if ((addr >= phyp_dump_info->reserved_scratch_addr) && + (addr <= phyp_dump_info->reserved_scratch_addr + + phyp_dump_info->reserved_scratch_size)) + scratch_area_size += length; + + if ((reserved_area_size == phyp_dump_info->init_reserve_size) && + (scratch_area_size == phyp_dump_info->reserved_scratch_size)) { + + invalidate_last_dump(&phdr, + phyp_dump_info->reserved_scratch_addr); + register_dump_area(&phdr, + phyp_dump_info->reserved_scratch_addr); + } +} + /* ------------------------------------------------- */ /** * sysfs_release_region -- sysfs interface to release memory range. @@ -285,6 +318,8 @@ static ssize_t store_release_region(struct kobject *kobj, if (ret != 2) return -EINVAL; + track_freed_range(start_addr, length); + /* Range-check - don't free any reserved memory that * wasn't reserved for phyp-dump */ if (start_addr < phyp_dump_info->init_reserve_start) |