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Subject[PATCH 10/11] pstore/platform: Make automatic updates interval configurable
Date
There is no behavioural change, the default value is still 60 seconds.

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Kees Cook <keescook@chromium.org>
---
fs/pstore/platform.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 61461ed..34ca314 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -31,6 +31,7 @@
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/hardirq.h>
+#include <linux/jiffies.h>
#include <linux/workqueue.h>

#include "internal.h"
@@ -40,7 +41,10 @@
* whether the system is actually still running well enough
* to let someone see the entry
*/
-#define PSTORE_INTERVAL (60 * HZ)
+static int pstore_update_ms = 60000;
+module_param_named(update_ms, pstore_update_ms, int, 0600);
+MODULE_PARM_DESC(update_ms, "milliseconds before pstore updates its content "
+ "(default is 60000; -1 means runtime updates are disabled)");

static int pstore_new_entry;

@@ -231,8 +235,11 @@ int pstore_register(struct pstore_info *psi)
kmsg_dump_register(&pstore_dumper);
pstore_register_console();

- pstore_timer.expires = jiffies + PSTORE_INTERVAL;
- add_timer(&pstore_timer);
+ if (pstore_update_ms >= 0) {
+ pstore_timer.expires = jiffies +
+ msecs_to_jiffies(pstore_update_ms);
+ add_timer(&pstore_timer);
+ }

return 0;
}
@@ -291,7 +298,7 @@ static void pstore_timefunc(unsigned long dummy)
schedule_work(&pstore_work);
}

- mod_timer(&pstore_timer, jiffies + PSTORE_INTERVAL);
+ mod_timer(&pstore_timer, jiffies + msecs_to_jiffies(pstore_update_ms));
}

module_param(backend, charp, 0444);
--
1.7.9.2


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