* [PATCH] mm/zsmalloc: add log for module load/unload
@ 2015-01-24 13:48 ` Ganesh Mahendran
0 siblings, 0 replies; 8+ messages in thread
From: Ganesh Mahendran @ 2015-01-24 13:48 UTC (permalink / raw)
To: minchan, ngupta; +Cc: akpm, linux-mm, linux-kernel, Ganesh Mahendran
Sometimes, we want to know whether a module is loaded or unloaded
from the log.
This patch adds some log.
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Minchan Kim <minchan@kernel.org>
---
mm/zsmalloc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2d5f5be..16617e9 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -72,6 +72,8 @@
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#ifdef CONFIG_ZSMALLOC_DEBUG
#define DEBUG
#endif
@@ -1460,6 +1462,8 @@ static int __init zs_init(void)
{
int ret = zs_register_cpu_notifier();
+ pr_info("loaded\n");
+
if (ret)
goto notifier_fail;
@@ -1474,6 +1478,7 @@ static int __init zs_init(void)
pr_err("zs stat initialization failed\n");
goto stat_fail;
}
+
return 0;
stat_fail:
@@ -1483,6 +1488,8 @@ stat_fail:
notifier_fail:
zs_unregister_cpu_notifier();
+ pr_info("unloaded\n");
+
return ret;
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH] mm/zsmalloc: add log for module load/unload
@ 2015-01-24 13:48 ` Ganesh Mahendran
0 siblings, 0 replies; 8+ messages in thread
From: Ganesh Mahendran @ 2015-01-24 13:48 UTC (permalink / raw)
To: minchan, ngupta; +Cc: akpm, linux-mm, linux-kernel, Ganesh Mahendran
Sometimes, we want to know whether a module is loaded or unloaded
from the log.
This patch adds some log.
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Minchan Kim <minchan@kernel.org>
---
mm/zsmalloc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2d5f5be..16617e9 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -72,6 +72,8 @@
*
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#ifdef CONFIG_ZSMALLOC_DEBUG
#define DEBUG
#endif
@@ -1460,6 +1462,8 @@ static int __init zs_init(void)
{
int ret = zs_register_cpu_notifier();
+ pr_info("loaded\n");
+
if (ret)
goto notifier_fail;
@@ -1474,6 +1478,7 @@ static int __init zs_init(void)
pr_err("zs stat initialization failed\n");
goto stat_fail;
}
+
return 0;
stat_fail:
@@ -1483,6 +1488,8 @@ stat_fail:
notifier_fail:
zs_unregister_cpu_notifier();
+ pr_info("unloaded\n");
+
return ret;
}
--
1.7.9.5
--
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
2015-01-24 13:48 ` Ganesh Mahendran
@ 2015-01-26 23:19 ` Andrew Morton
-1 siblings, 0 replies; 8+ messages in thread
From: Andrew Morton @ 2015-01-26 23:19 UTC (permalink / raw)
To: Ganesh Mahendran; +Cc: minchan, ngupta, linux-mm, linux-kernel
On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
> Sometimes, we want to know whether a module is loaded or unloaded
> from the log.
Why? What's special about zsmalloc?
Please provide much better justification than this.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
@ 2015-01-26 23:19 ` Andrew Morton
0 siblings, 0 replies; 8+ messages in thread
From: Andrew Morton @ 2015-01-26 23:19 UTC (permalink / raw)
To: Ganesh Mahendran; +Cc: minchan, ngupta, linux-mm, linux-kernel
On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
> Sometimes, we want to know whether a module is loaded or unloaded
> from the log.
Why? What's special about zsmalloc?
Please provide much better justification than this.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
2015-01-26 23:19 ` Andrew Morton
@ 2015-01-27 2:07 ` Ganesh Mahendran
-1 siblings, 0 replies; 8+ messages in thread
From: Ganesh Mahendran @ 2015-01-27 2:07 UTC (permalink / raw)
To: Andrew Morton; +Cc: Minchan Kim, Nitin Gupta, Linux-MM, linux-kernel
Hello, Andrew
2015-01-27 7:19 GMT+08:00 Andrew Morton <akpm@linux-foundation.org>:
> On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
>
>> Sometimes, we want to know whether a module is loaded or unloaded
>> from the log.
>
> Why? What's special about zsmalloc?
>
> Please provide much better justification than this.
When I debug with the zsmalloc module built in kernel.
After system boots up, I did not see:
/sys/kernel/debug/zsmalloc dir.
Although the reason for this is that I made a mistake. I
forgot to add debugfs entry in /etc/fstab.
But I think it is suitable to add information for a module load/unload.
Then we can get this by:
dmesg | grep zsmalloc.
Thanks.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
@ 2015-01-27 2:07 ` Ganesh Mahendran
0 siblings, 0 replies; 8+ messages in thread
From: Ganesh Mahendran @ 2015-01-27 2:07 UTC (permalink / raw)
To: Andrew Morton; +Cc: Minchan Kim, Nitin Gupta, Linux-MM, linux-kernel
Hello, Andrew
2015-01-27 7:19 GMT+08:00 Andrew Morton <akpm@linux-foundation.org>:
> On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
>
>> Sometimes, we want to know whether a module is loaded or unloaded
>> from the log.
>
> Why? What's special about zsmalloc?
>
> Please provide much better justification than this.
When I debug with the zsmalloc module built in kernel.
After system boots up, I did not see:
/sys/kernel/debug/zsmalloc dir.
Although the reason for this is that I made a mistake. I
forgot to add debugfs entry in /etc/fstab.
But I think it is suitable to add information for a module load/unload.
Then we can get this by:
dmesg | grep zsmalloc.
Thanks.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
2015-01-27 2:07 ` Ganesh Mahendran
@ 2015-01-27 3:23 ` Minchan Kim
-1 siblings, 0 replies; 8+ messages in thread
From: Minchan Kim @ 2015-01-27 3:23 UTC (permalink / raw)
To: Ganesh Mahendran; +Cc: Andrew Morton, Nitin Gupta, Linux-MM, linux-kernel
Hello Ganesh,
On Tue, Jan 27, 2015 at 10:07:53AM +0800, Ganesh Mahendran wrote:
> Hello, Andrew
>
> 2015-01-27 7:19 GMT+08:00 Andrew Morton <akpm@linux-foundation.org>:
> > On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
> >
> >> Sometimes, we want to know whether a module is loaded or unloaded
> >> from the log.
> >
> > Why? What's special about zsmalloc?
> >
> > Please provide much better justification than this.
>
> When I debug with the zsmalloc module built in kernel.
> After system boots up, I did not see:
> /sys/kernel/debug/zsmalloc dir.
>
> Although the reason for this is that I made a mistake. I
> forgot to add debugfs entry in /etc/fstab.
> But I think it is suitable to add information for a module load/unload.
> Then we can get this by:
> dmesg | grep zsmalloc.
I understand your trouble but it's general problem, not zsmalloc specific.
Then, if you really want to fix, you should approach more generic ways.
Thanks.
--
Kind regards,
Minchan Kim
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] mm/zsmalloc: add log for module load/unload
@ 2015-01-27 3:23 ` Minchan Kim
0 siblings, 0 replies; 8+ messages in thread
From: Minchan Kim @ 2015-01-27 3:23 UTC (permalink / raw)
To: Ganesh Mahendran; +Cc: Andrew Morton, Nitin Gupta, Linux-MM, linux-kernel
Hello Ganesh,
On Tue, Jan 27, 2015 at 10:07:53AM +0800, Ganesh Mahendran wrote:
> Hello, Andrew
>
> 2015-01-27 7:19 GMT+08:00 Andrew Morton <akpm@linux-foundation.org>:
> > On Sat, 24 Jan 2015 21:48:41 +0800 Ganesh Mahendran <opensource.ganesh@gmail.com> wrote:
> >
> >> Sometimes, we want to know whether a module is loaded or unloaded
> >> from the log.
> >
> > Why? What's special about zsmalloc?
> >
> > Please provide much better justification than this.
>
> When I debug with the zsmalloc module built in kernel.
> After system boots up, I did not see:
> /sys/kernel/debug/zsmalloc dir.
>
> Although the reason for this is that I made a mistake. I
> forgot to add debugfs entry in /etc/fstab.
> But I think it is suitable to add information for a module load/unload.
> Then we can get this by:
> dmesg | grep zsmalloc.
I understand your trouble but it's general problem, not zsmalloc specific.
Then, if you really want to fix, you should approach more generic ways.
Thanks.
--
Kind regards,
Minchan Kim
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2015-01-27 3:23 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-01-24 13:48 [PATCH] mm/zsmalloc: add log for module load/unload Ganesh Mahendran
2015-01-24 13:48 ` Ganesh Mahendran
2015-01-26 23:19 ` Andrew Morton
2015-01-26 23:19 ` Andrew Morton
2015-01-27 2:07 ` Ganesh Mahendran
2015-01-27 2:07 ` Ganesh Mahendran
2015-01-27 3:23 ` Minchan Kim
2015-01-27 3:23 ` Minchan Kim
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