hald holding up memory by queueing unwanted apm information

[yeoching]

Dear friend,

I am using hal-0.10 on fedora 8. After running the machine for 3 days, I 
get to see hald is taking up 100MB of memory. I peek into hald, and find 
the followings shows up every second, apparently it is trying to get 
some power management info from /proc/apm:

=========
gettimeofday({1210058286, 1144}, NULL)  = 0
gettimeofday({1210058286, 1324}, NULL)  = 0
poll([{fd=5, events=POLLIN}, {fd=9, events=POLLIN}, {fd=11, 
events=POLLIN|POLLPRI}, {fd=12, events=POLLPRI}, {fd=13, events=POLLIN}, 
{fd=15, events=0}, {fd=7, events=POLLIN}, {fd=10, events=POLLIN}, 
{fd=14, events=POLLIN}, {fd=8, events=POLLIN}], 10, 0) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb767d000
open("//proc/apm", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 
0) = 0xb767c000
read(3, "1.16ac 1.2 0x07 0x01 0xff 0x80 -"..., 1024) = 40
close(3)                                = 0
munmap(0xb767c000, 4096)                = 0
munmap(0xb767d000, 4096)
=========


My question is, could we just make some external configuration to turn 
off this behavior of hald ? It seems like there is no other software 
interested in getting apm information, so hald just keep all of them in 
queue and consume lots of memory.


Thanks.

Best Regards,
yeoching




ps. After taking a look for /proc/apm in the source code, I wonder it 
has something to do with this:

hal-0.5.10/hald/linux/apm.c
==========
276-gboolean
277-apm_synthesize_hotplug_events (void)
278-{
279-    gboolean ret;
280-    HalDevice *computer;
281-    HotplugEvent *hotplug_event;
282-
283-    ret = FALSE;
284-
285:    if (!g_file_test ("/proc/apm", G_FILE_TEST_EXISTS))
286-            goto out;
287-
288-    ret = TRUE;
289-
290-    if ((computer = hal_device_store_find (hald_get_gdl (), 
"/org/freedesktop/Hal/devices/computer")) == NULL &&
291-        (computer = hal_device_store_find (hald_get_tdl (), 
"/org/freedesktop/Hal/devices/computer")) == NULL) {
292-            HAL_ERROR (("No computer object?"));
293-            goto out;
294-    }
295-
296-    /* Set appropriate properties on the computer object */
297-    hal_device_property_set_string (computer, 
"power_management.type", "apm");
298-
299-    hotplug_event = g_new0 (HotplugEvent, 1);
300-    hotplug_event->action = HOTPLUG_ACTION_ADD;
301-    hotplug_event->type = HOTPLUG_EVENT_APM;
302:    g_strlcpy (hotplug_event->apm.apm_path, "/proc/apm", sizeof 
(hotplug_event->apm.apm_path));
303-    hotplug_event->apm.apm_type = APM_TYPE_BATTERY;
304-    hotplug_event_enqueue (hotplug_event);
305-
306-    hotplug_event = g_new0 (HotplugEvent, 1);
307-    hotplug_event->type = HOTPLUG_EVENT_APM;
308:    g_strlcpy (hotplug_event->apm.apm_path, "/proc/apm", sizeof 
(hotplug_event->apm.apm_path));
309-    hotplug_event->apm.apm_type = APM_TYPE_AC_ADAPTER;
310-    hotplug_event_enqueue (hotplug_event);
311-
312-    g_timeout_add (APM_POLL_INTERVAL,
313-                   apm_poll,
314-                   NULL);
315-
316-out:
317-    return ret;
318-}
===============

Hope this help.


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