This patch 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 <[EMAIL PROTECTED]>
-----
---
arch/powerpc/platforms/pseries/phyp_dump.c | 36 +++++++++++++++++++++++++++++
include/asm-powerpc/phyp_dump.h | 3 ++
2 files changed, 39 insertions(+)
Index: 2.6.24-rc5/include/asm-powerpc/phyp_dump.h
===================================================================
--- 2.6.24-rc5.orig/include/asm-powerpc/phyp_dump.h 2008-01-07
22:55:28.000000000 -0600
+++ 2.6.24-rc5/include/asm-powerpc/phyp_dump.h 2008-01-07 22:58:02.000000000
-0600
@@ -24,6 +24,9 @@ struct phyp_dump {
/* Memory that is reserved during very early boot. */
unsigned long init_reserve_start;
unsigned long init_reserve_size;
+ /* Scratch area memory details */
+ unsigned long scratch_reserve_start;
+ unsigned long scratch_reserve_size;
};
extern struct phyp_dump *phyp_dump_info;
Index: 2.6.24-rc5/arch/powerpc/platforms/pseries/phyp_dump.c
===================================================================
--- 2.6.24-rc5.orig/arch/powerpc/platforms/pseries/phyp_dump.c 2008-01-07
22:57:27.000000000 -0600
+++ 2.6.24-rc5/arch/powerpc/platforms/pseries/phyp_dump.c 2008-01-07
22:58:02.000000000 -0600
@@ -287,6 +287,39 @@ release_memory_range(unsigned long start
}
}
+/**
+ * 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->scratch_reserve_start) &&
+ (addr <= phyp_dump_info->scratch_reserve_start +
+ phyp_dump_info->scratch_reserve_size))
+ scratch_area_size += length;
+
+ if ((reserved_area_size == phyp_dump_info->init_reserve_start) &&
+ (scratch_area_size == phyp_dump_info->scratch_reserve_size)) {
+
+ invalidate_last_dump(&phdr,
+ phyp_dump_info->scratch_reserve_start);
+ register_dump_area (&phdr,
+ phyp_dump_info->scratch_reserve_start);
+ }
+}
+
/* ------------------------------------------------- */
/**
* sysfs_release_region -- sysfs interface to release memory range.
@@ -310,6 +343,8 @@ store_release_region(struct kset *kset,
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)
@@ -414,6 +449,7 @@ static int __init phyp_dump_setup(void)
}
/* Don't allow user to release the 256MB scratch area */
+ /* this might be wrong */
phyp_dump_info->init_reserve_size = free_area_length;
/* Should we create a dump_subsys, analogous to s390/ipl.c ? */
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