From: Jason Wessel <jason.wessel@windriver.com>
To: torvalds@linux-foundation.org
Cc: linux-kernel@vger.kernel.org,
kgdb-bugreport@lists.sourceforge.net,
Jason Wessel <jason.wessel@windriver.com>
Subject: [PATCH 03/11] debug_core: stop rcu warnings on kernel resume
Date: Fri, 22 Oct 2010 15:56:23 -0500 [thread overview]
Message-ID: <1287780991-7476-4-git-send-email-jason.wessel@windriver.com> (raw)
In-Reply-To: <1287780991-7476-1-git-send-email-jason.wessel@windriver.com>
When returning from the kernel debugger reset the rcu jiffies_stall
value to prevent the rcu stall detector from sending NMI events which
invoke a stack dump for each cpu in the system.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
kernel/debug/debug_core.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index c812857..5a3b04d 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -47,6 +47,7 @@
#include <linux/pid.h>
#include <linux/smp.h>
#include <linux/mm.h>
+#include <linux/rcupdate.h>
#include <asm/cacheflush.h>
#include <asm/byteorder.h>
@@ -474,6 +475,7 @@ static void dbg_touch_watchdogs(void)
{
touch_softlockup_watchdog_sync();
clocksource_touch_watchdog();
+ rcu_cpu_stall_reset();
}
static int kgdb_cpu_enter(struct kgdb_state *ks, struct pt_regs *regs)
--
1.6.3.3
next prev parent reply other threads:[~2010-10-22 20:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-22 20:56 [GIT PULL] kgdb/kdb tree for 2.6.37 Jason Wessel
2010-10-22 20:56 ` [PATCH 01/11] x86,kgdb: fix debugger hw breakpoint test regression in 2.6.35 Jason Wessel
2010-11-01 21:27 ` Frederic Weisbecker
2010-10-22 20:56 ` [PATCH 02/11] debug_core: move all watch dog syncs to a single function Jason Wessel
2010-10-22 20:56 ` Jason Wessel [this message]
2010-10-22 20:56 ` [PATCH 04/11] kdb: Allow kernel loadable modules to add kdb shell functions Jason Wessel
2010-10-22 20:56 ` [PATCH 05/11] kdb,ftdump: Remove reference to internal kdb include Jason Wessel
2010-10-22 20:56 ` [PATCH 06/11] kdb: Fix oops in kdb_unregister Jason Wessel
2010-10-22 20:56 ` [PATCH 07/11] kdb,kgdb: fix sparse fixups Jason Wessel
2010-10-22 20:56 ` [PATCH 08/11] debug_core: disable hw_breakpoints on all cores in kgdb_cpu_enter() Jason Wessel
2010-10-22 20:56 ` [PATCH 09/11] x86,kgdb: remove unnecessary call to kgdb_correct_hw_break() Jason Wessel
2010-10-22 20:56 ` [PATCH 10/11] debug_core: refactor locking for master/slave cpus Jason Wessel
2010-10-22 20:56 ` [PATCH 11/11] kdb,debug_core: adjust master cpu switch logic against new debug_core locking Jason Wessel
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