From: Xiaotian Feng <dfeng@redhat.com>
To: lenb@kernel.org, ming.m.lin@intel.com, robert.moore@intel.com,
linux-acpi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Xiaotian Feng <dfeng@redhat.com>
Subject: [PATCH] ACPICA: don't cond_resched() when irq_disabled or in_atomic
Date: Fri, 4 Dec 2009 12:26:00 +0800 [thread overview]
Message-ID: <1259900760-6424-1-git-send-email-dfeng@redhat.com> (raw)
commit 8bd108d adds preemption point after each opcode parse, then
a sleeping function called from invalid context bug was founded
during suspend/resume stage. this was fixed in commit abe1dfa by
don't cond_resched when irq_disabled. But recent commit 138d156 changes
the behaviour to don't cond_resched when in_atomic. This makes the
sleeping function called from invalid context bug happen again, which
is reported in http://lkml.org/lkml/2009/12/1/371.
The fix is to cond_sched() only when preemptible, which means not in
irq_disabled or in_atomic.
Reported-and-bisected-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
---
include/acpi/platform/aclinux.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 9d7febd..5b415ee 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -152,7 +152,7 @@ static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
#include <linux/hardirq.h>
#define ACPI_PREEMPTION_POINT() \
do { \
- if (!in_atomic_preempt_off()) \
+ if (preemptible()) \
cond_resched(); \
} while (0)
--
1.6.5.2
next reply other threads:[~2009-12-04 4:26 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-04 4:26 Xiaotian Feng [this message]
2009-12-04 5:36 ` [PATCH] ACPICA: don't cond_resched() when irq_disabled or in_atomic Zhang Rui
2009-12-04 5:38 ` Zhang Rui
2009-12-04 6:50 ` Justin Mattock
2009-12-04 7:05 ` Danny Feng
2009-12-04 7:27 ` Justin P. Mattock
2009-12-09 1:54 ` Xiaotian Feng
2009-12-10 10:09 ` Pavel Machek
2009-12-10 11:56 ` [PATCH -V2] acpi: don't cond_resched if irq is disabled Xiaotian Feng
2009-12-10 12:21 ` Alexey Starikovskiy
2009-12-11 5:46 ` Lin Ming
2009-12-11 11:48 ` Alexey Starikovskiy
2009-12-11 16:15 ` Pavel Machek
2009-12-11 16:25 ` Alexey Starikovskiy
2009-12-11 17:34 ` Pavel Machek
2009-12-28 6:02 ` Xiaotian Feng
2009-12-28 11:12 ` Alexey Starikovskiy
2010-01-16 6:44 ` Len Brown
2009-12-10 17:58 ` [PATCH] ACPICA: don't cond_resched() when irq_disabled or in_atomic Alexey Starikovskiy
2009-12-10 18:18 ` Pavel Machek
2009-12-10 18:37 ` Alexey Starikovskiy
2009-12-10 22:46 ` Justin P. Mattock
2009-12-10 22:54 ` Moore, Robert
2010-01-16 6:46 ` Len Brown
2009-12-11 17:33 ` Pavel Machek
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