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Made the "kmem -f <address>" and "kmem <address>" options more

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efficient by using the new do_list() callback function feature
as well as restricting the search to only the NUMA node that
contains the address.
(anderson@redhat.com)
This commit is contained in:
Dave Anderson 2014-03-17 16:57:48 -04:00
parent d3e5664ec6
commit 32aa6bbbf7
1 changed files with 72 additions and 9 deletions
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81
memory.c
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@ -146,7 +146,8 @@ static int dump_zone_page_usage(void);
static void dump_multidimensional_free_pages(struct meminfo *);
static void dump_free_pages_zones_v1(struct meminfo *);
static void dump_free_pages_zones_v2(struct meminfo *);
static int dump_zone_free_area(ulong, int, ulong);
struct free_page_callback_data;
static int dump_zone_free_area(ulong, int, ulong, struct free_page_callback_data *);
static void dump_page_hash_table(struct meminfo *);
static void kmem_search(struct meminfo *);
static void kmem_cache_init(void);
@ -6661,7 +6662,7 @@ dump_free_pages_zones_v1(struct meminfo *fi)
if (value)
found += dump_zone_free_area(node_zones+
OFFSET(zone_struct_free_area),
vt->nr_free_areas, verbose);
vt->nr_free_areas, verbose, NULL);
node_zones += SIZE(zone_struct);
}
@ -6780,6 +6781,36 @@ dump_free_pages_zones_v1(struct meminfo *fi)
}
/*
* Callback function for free-list search for a specific page.
*/
struct free_page_callback_data {
physaddr_t searchphys;
long block_size;
ulong page;
int found;
};
static int
free_page_callback(void *page, void *arg)
{
struct free_page_callback_data *cbd = arg;
physaddr_t this_phys;
if (!page_to_phys((ulong)page, &this_phys))
return FALSE;
if ((cbd->searchphys >= this_phys) &&
(cbd->searchphys < (this_phys + cbd->block_size))) {
cbd->page = (ulong)page;
cbd->found = TRUE;
return TRUE;
}
return FALSE;
}
/*
* Same as dump_free_pages_zones_v1(), but updated for numerous 2.6 zone
* and free_area related data structure changes.
@ -6795,7 +6826,8 @@ dump_free_pages_zones_v2(struct meminfo *fi)
int order, errflag, do_search;
ulong offset, verbose, value, sum, found;
ulong this_addr;
physaddr_t phys, this_phys, searchphys;
physaddr_t phys, this_phys, searchphys, end_paddr;
struct free_page_callback_data callback_data;
ulong pp;
ulong zone_mem_map;
ulong zone_start_paddr;
@ -6832,6 +6864,8 @@ dump_free_pages_zones_v2(struct meminfo *fi)
"dump_free_pages_zones_v2: no memtype specified\n");
}
do_search = TRUE;
callback_data.searchphys = searchphys;
callback_data.found = FALSE;
} else {
searchphys = 0;
do_search = FALSE;
@ -6983,15 +7017,32 @@ dump_free_pages_zones_v2(struct meminfo *fi)
sum += value;
if (value)
found += dump_zone_free_area(node_zones+
OFFSET(zone_free_area),
vt->nr_free_areas, verbose);
if (value) {
if (do_search) {
end_paddr = nt->start_paddr +
((physaddr_t)nt->size *
(physaddr_t)PAGESIZE());
if ((searchphys >= nt->start_paddr) &&
(searchphys < end_paddr))
found += dump_zone_free_area(node_zones+
OFFSET(zone_free_area),
vt->nr_free_areas, verbose,
&callback_data);
if (callback_data.found)
goto done_search;
} else
found += dump_zone_free_area(node_zones+
OFFSET(zone_free_area),
vt->nr_free_areas, verbose, NULL);
}
node_zones += SIZE(zone);
}
}
done_search:
hq_close();
if (fi->flags & (GET_FREE_PAGES|GET_ZONE_SIZES|GET_FREE_HIGHMEM_PAGES)) {
@ -7206,7 +7257,8 @@ char *free_area_hdr3 = "AREA SIZE FREE_AREA_STRUCT\n";
char *free_area_hdr4 = "AREA SIZE FREE_AREA_STRUCT BLOCKS PAGES\n";
static int
dump_zone_free_area(ulong free_area, int num, ulong verbose)
dump_zone_free_area(ulong free_area, int num, ulong verbose,
struct free_page_callback_data *callback_data)
{
int i, j;
long chunk_size;
@ -7353,7 +7405,13 @@ multiple_lists:
ld->end = free_list;
ld->list_head_offset = OFFSET(page_lru) +
OFFSET(list_head_next);
if (callback_data) {
ld->flags &= ~VERBOSE;
ld->flags |= (LIST_CALLBACK|CALLBACK_RETURN);
ld->callback_func = free_page_callback;
ld->callback_data = (void *)callback_data;
callback_data->block_size = chunk_size * PAGESIZE();
}
cnt = do_list(ld);
if (cnt < 0) {
error(pc->curcmd_flags & IGNORE_ERRORS ? INFO : FATAL,
@ -7363,6 +7421,11 @@ multiple_lists:
goto bailout;
}
if (callback_data && callback_data->found) {
fprintf(fp, "%lx\n", callback_data->page);
goto bailout;
}
if (!verbose)
fprintf(fp, "%6d %6ld\n", cnt, cnt*chunk_size);