From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Pavankumar Kondeti <pkondeti@codeaurora.org>,
Steven Rostedt <rostedt@goodmis.org>,
Amit Pundir <amit.pundir@linaro.org>
Subject: [PATCH 3.18 28/28] tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results
Date: Wed, 19 Jul 2017 13:15:56 +0200 [thread overview]
Message-ID: <20170719111321.538545958@linuxfoundation.org> (raw)
In-Reply-To: <20170719111319.044769907@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Pavankumar Kondeti <pkondeti@codeaurora.org>
commit c59f29cb144a6a0dfac16ede9dc8eafc02dc56ca upstream.
The 's' flag is supposed to indicate that a softirq is running. This
can be detected by testing the preempt_count with SOFTIRQ_OFFSET.
The current code tests the preempt_count with SOFTIRQ_MASK, which
would be true even when softirqs are disabled but not serving a
softirq.
Link: http://lkml.kernel.org/r/1481300417-3564-1-git-send-email-pkondeti@codeaurora.org
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/trace/trace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1587,7 +1587,7 @@ tracing_generic_entry_update(struct trac
TRACE_FLAG_IRQS_NOSUPPORT |
#endif
((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
- ((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
+ ((pc & SOFTIRQ_OFFSET) ? TRACE_FLAG_SOFTIRQ : 0) |
(tif_need_resched() ? TRACE_FLAG_NEED_RESCHED : 0) |
(test_preempt_need_resched() ? TRACE_FLAG_PREEMPT_RESCHED : 0);
}
next prev parent reply other threads:[~2017-07-19 11:15 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-19 11:15 [PATCH 3.18 00/28] 3.18.62-stable review Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 01/28] ipv6: avoid unregistering inet6_dev for loopback Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 02/28] tcp: reset sk_rx_dst in tcp_disconnect() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 03/28] net: prevent sign extension in dev_get_stats() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 04/28] ipv6: dad: dont remove dynamic addresses if link is down Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 06/28] cfg80211: Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 07/28] cfg80211: Validate frequencies nested in NL80211_ATTR_SCAN_FREQUENCIES Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 08/28] cfg80211: Check if PMKID attribute is of expected size Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 09/28] irqchip/gic-v3: Fix out-of-bound access in gic_set_affinity Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 10/28] parisc: Report SIGSEGV instead of SIGBUS when running out of stack Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 11/28] parisc: use compat_sys_keyctl() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 12/28] parisc: DMA API: return error instead of BUG_ON for dma ops on non dma devs Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 13/28] parisc/mm: Ensure IRQs are off in switch_mm() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 14/28] tools/lib/lockdep: Reduce MAX_LOCK_DEPTH to avoid overflowing lock_chain/: Depth Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 15/28] kernel/extable.c: mark core_kernel_text notrace Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 16/28] fs/dcache.c: fix spin lockup issue on nlru->lock Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 17/28] checkpatch: silence perl 5.26.0 unescaped left brace warnings Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 18/28] exec: Limit arg stack to at most 75% of _STK_LIM Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 19/28] vt: fix unchecked __put_user() in tioclinux ioctls Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 22/28] crypto: atmel - only treat EBUSY as transient if backlog Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 23/28] crypto: sha1-ssse3 - Disable avx2 Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 25/28] sched/topology: Optimize build_group_mask() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 26/28] sched/topology: Fix overlapping sched_group_mask Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 27/28] PM / QoS: return -EINVAL for bogus strings Greg Kroah-Hartman
2017-07-19 11:15 ` Greg Kroah-Hartman [this message]
2017-07-19 20:31 ` [PATCH 3.18 00/28] 3.18.62-stable review Guenter Roeck
2017-07-19 23:40 ` Shuah Khan
2017-07-20 5:07 ` Greg Kroah-Hartman
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