evie/android_kernel_oneplus_msm8998
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kmemleak : Make module scanning optional using config

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Currently kmemleak scans module memory as provided
in the area list. This takes up lot of time with
irq's and preemption disabled. Provide a compile
time configurable config to enable this functionality.

Change-Id: I5117705e7e6726acdf492e7f87c0703bc1f28da0
Signed-off-by: Vignesh Radhakrishnan <vigneshr@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
[satyap: trivial merge conflict resolution and remove duplicate entry]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
This commit is contained in:
Vignesh Radhakrishnan 2015-01-30 16:26:41 +05:30 • committed by David Keitel
parent 1723ce4914
commit 1dd9d8dd98
2 changed files with 13 additions and 7 deletions
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8
kernel/module.c
View file

@ -2579,7 +2579,13 @@ void * __weak module_alloc(unsigned long size)
return vmalloc_exec(size);
}
#ifdef CONFIG_DEBUG_KMEMLEAK
#if defined(CONFIG_DEBUG_KMEMLEAK) && defined(CONFIG_DEBUG_MODULE_SCAN_OFF)
static void kmemleak_load_module(const struct module *mod,
const struct load_info *info)
{
kmemleak_no_scan(mod->module_core);
}
#elif defined(CONFIG_DEBUG_KMEMLEAK)
static void kmemleak_load_module(const struct module *mod,
const struct load_info *info)
{

12
lib/Kconfig.debug
View file

@ -956,14 +956,14 @@ config DEBUG_TASK_STACK_SCAN_OFF
writing to the debugfs entry :
echo "stack=on" > /sys/kernel/debug/kmemleak.
config DEBUG_TASK_STACK_SCAN_OFF
bool "Disable kmemleak task stack scan by default"
config DEBUG_MODULE_SCAN_OFF
bool "Disable module memory scan for leaks by default"
depends on DEBUG_KMEMLEAK
help
Say Y here to disable kmemleak task stack scan by default
at compile time. It can be enabled later if required by
writing to the debugfs entry :
echo "stack=on" > /sys/kernel/debug/kmemleak.
Say Y here to disable scanning kernel modules area list
by default for memory leaks. Module scan an potentially
run with irq/preemption disabled for considerable amount
of time.
config DEBUG_PREEMPT
bool "Debug preemptible kernel"