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Code Issues Projects Releases Wiki Activity

lowmemorykiller: enhance debug information 

Add extra debug information to make it easier to both determine
why the lowmemorykiller killed a process and to help find the source
of memory leaks.

Also increase the debug level for "select" statements to help prevent
flooding the log.

Change-Id: I3b6876c5ecdf192ecc271aed3f37579f66d47a08
Signed-off-by: Liam Mark <lmark@codeaurora.org>
This commit is contained in:
Liam Mark 2014-06-03 13:57:47 -07:00
parent c6ec8d930a
commit ba79232663
1 changed files with 23 additions and 3 deletions
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26
drivers/staging/android/lowmemorykiller.c
View File

@ -43,6 +43,7 @@
#include <linux/delay.h>
#include <linux/swap.h>
#include <linux/fs.h>
#include <linux/cpuset.h>
#ifdef CONFIG_HIGHMEM
#define _ZONE ZONE_HIGHMEM
@ -367,14 +368,19 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc)
selected = p;
selected_tasksize = tasksize;
selected_oom_score_adj = oom_score_adj;
lowmem_print(2, "select '%s' (%d), adj %hd, size %d, to kill\n",
lowmem_print(3, "select '%s' (%d), adj %hd, size %d, to kill\n",
p->comm, p->pid, oom_score_adj, tasksize);
}
if (selected) {
lowmem_print(1, "Killing '%s' (%d), adj %hd,\n" \
" to free %ldkB on behalf of '%s' (%d) because\n" \
" cache %ldkB is below limit %ldkB for oom_score_adj %hd\n" \
" Free memory is %ldkB above reserved\n",
" Free memory is %ldkB above reserved.\n" \
" Free CMA is %ldkB\n" \
" Total reserve is %ldkB\n" \
" Total free pages is %ldkB\n" \
" Total file cache is %ldkB\n" \
" GFP mask is 0x%x\n",
selected->comm, selected->pid,
selected_oom_score_adj,
selected_tasksize * (long)(PAGE_SIZE / 1024),
@ -382,7 +388,21 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc)
other_file * (long)(PAGE_SIZE / 1024),
minfree * (long)(PAGE_SIZE / 1024),
min_score_adj,
other_free * (long)(PAGE_SIZE / 1024));
other_free * (long)(PAGE_SIZE / 1024),
global_page_state(NR_FREE_CMA_PAGES) *
(long)(PAGE_SIZE / 1024),
totalreserve_pages * (long)(PAGE_SIZE / 1024),
global_page_state(NR_FREE_PAGES) *
(long)(PAGE_SIZE / 1024),
global_page_state(NR_FILE_PAGES) *
(long)(PAGE_SIZE / 1024),
sc->gfp_mask);
if (lowmem_debug_level >= 2 && selected_oom_score_adj == 0) {
show_mem(SHOW_MEM_FILTER_NODES);
dump_tasks(NULL, NULL);
}
lowmem_deathpending_timeout = jiffies + HZ;
send_sig(SIGKILL, selected, 0);
set_tsk_thread_flag(selected, TIF_MEMDIE);