[Cluster-devel] [PATCH] GFS2 - bz 192082: System won't suspend with GFS2 file system mounted
Abhijith Das
adas at redhat.com
Wed Jun 27 15:40:38 UTC 2007
The kernel threads in gfs2, namely gfs2_scand, gfs2_logd,
gfs2_quotad, gfs2_glockd, gfs2_recoverd weren't doing anything when the suspend
mechanism was trying to freeze them.
I put in calls to refrigerator() in the loops for all the daemons and suspend works as expected.
Signed-off-by: Abhijith Das <adas at redhat.com>
--
diff --git a/fs/gfs2/daemon.c b/fs/gfs2/daemon.c
index 683cb5b..675c8e6 100644
--- a/fs/gfs2/daemon.c
+++ b/fs/gfs2/daemon.c
@@ -16,6 +16,7 @@ #include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
+#include <linux/freezer.h>
#include "gfs2.h"
#include "incore.h"
@@ -27,6 +28,10 @@ #include "recovery.h"
#include "super.h"
#include "util.h"
+/* When one of our daemons (kernel threads) receives a signal
+ from the kernel's suspend mechanism to freeze, we oblige */
+#define freeze_on_signal { if (freezing(current)) refrigerator(); }
+
/* This uses schedule_timeout() instead of msleep() because it's good for
the daemons to wake up more often than the timeout when unmounting so
the user's unmount doesn't sit there forever.
@@ -49,6 +54,7 @@ int gfs2_scand(void *data)
while (!kthread_should_stop()) {
gfs2_scand_internal(sdp);
t = gfs2_tune_get(sdp, gt_scand_secs) * HZ;
+ freeze_on_signal;
schedule_timeout_interruptible(t);
}
@@ -74,6 +80,7 @@ int gfs2_glockd(void *data)
wait_event_interruptible(sdp->sd_reclaim_wq,
(atomic_read(&sdp->sd_reclaim_count) ||
kthread_should_stop()));
+ freeze_on_signal;
}
return 0;
@@ -93,6 +100,7 @@ int gfs2_recoverd(void *data)
while (!kthread_should_stop()) {
gfs2_check_journals(sdp);
t = gfs2_tune_get(sdp, gt_recoverd_secs) * HZ;
+ freeze_on_signal;
schedule_timeout_interruptible(t);
}
@@ -141,6 +149,7 @@ int gfs2_logd(void *data)
}
t = gfs2_tune_get(sdp, gt_logd_secs) * HZ;
+ freeze_on_signal;
schedule_timeout_interruptible(t);
}
@@ -191,6 +200,7 @@ int gfs2_quotad(void *data)
gfs2_quota_scan(sdp);
t = gfs2_tune_get(sdp, gt_quotad_secs) * HZ;
+ freeze_on_signal;
schedule_timeout_interruptible(t);
}
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