From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Mauro Carvalho Chehab <mchehab@s-opensource.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
"David S . Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Pavan Kondeti <pkondeti@codeaurora.org>,
Ingo Molnar <mingo@kernel.org>,
Joel Fernandes <joel@joelfernandes.org>
Subject: [PATCH 29/32] locking/lockdep: Branch the new vec-finegrained softirq masking to lockdep
Date: Tue, 12 Feb 2019 18:14:20 +0100 [thread overview]
Message-ID: <20190212171423.8308-30-frederic@kernel.org> (raw)
In-Reply-To: <20190212171423.8308-1-frederic@kernel.org>
Now that we have full support from softirqs to perform per vector
masking, let's feed lockdep with the proper inputs and push the vector
numbers involved in a base softirq lock usage:
LOCK_ENABLED_SOFTIRQ: push local_softirq_enabled()
LOCK_USED_IN_SOFTIRQ: push curr->softirq_context, modified by
lockdep_softirq_enter/exit()
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Pavan Kondeti <pkondeti@codeaurora.org>
Cc: Paul E . McKenney <paulmck@linux.vnet.ibm.com>
Cc: David S . Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
---
kernel/locking/lockdep.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index acd82145f6a6..570eea5376ec 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2877,6 +2877,7 @@ static void __trace_hardirqs_on_caller(unsigned long ip)
*/
if (curr->softirqs_enabled) {
usage.bit = LOCK_ENABLED_SOFTIRQ;
+ usage.vector = local_softirq_enabled();
if (!mark_held_locks(curr, &usage))
return;
}
@@ -2964,6 +2965,7 @@ void trace_softirqs_on(unsigned long ip)
struct task_struct *curr = current;
struct lock_usage usage = {
.bit = LOCK_ENABLED_SOFTIRQ,
+ .vector = local_softirq_enabled()
};
if (unlikely(!debug_locks || current->lockdep_recursion))
@@ -3028,7 +3030,7 @@ void trace_softirqs_off(unsigned long ip)
static int mark_irqflags(struct task_struct *curr, struct held_lock *hlock)
{
- struct lock_usage usage = { .vector = 0 };
+ struct lock_usage usage;
/*
* If non-trylock use in a hardirq or softirq context, then
* mark the lock as used in these contexts:
@@ -3037,22 +3039,26 @@ static int mark_irqflags(struct task_struct *curr, struct held_lock *hlock)
if (hlock->read) {
if (curr->hardirq_context) {
usage.bit = LOCK_USED_IN_HARDIRQ_READ;
+ usage.vector = 0;
if (!mark_lock(curr, hlock, &usage))
return 0;
}
if (curr->softirq_context) {
usage.bit = LOCK_USED_IN_SOFTIRQ_READ;
+ usage.vector = curr->softirq_context;
if (!mark_lock(curr, hlock, &usage))
return 0;
}
} else {
if (curr->hardirq_context) {
usage.bit = LOCK_USED_IN_HARDIRQ;
+ usage.vector = 0;
if (!mark_lock(curr, hlock, &usage))
return 0;
}
if (curr->softirq_context) {
usage.bit = LOCK_USED_IN_SOFTIRQ;
+ usage.vector = curr->softirq_context;
if (!mark_lock(curr, hlock, &usage))
return 0;
}
@@ -3061,19 +3067,23 @@ static int mark_irqflags(struct task_struct *curr, struct held_lock *hlock)
if (!hlock->hardirqs_off) {
if (hlock->read) {
usage.bit = LOCK_ENABLED_HARDIRQ_READ;
+ usage.vector = 0;
if (!mark_lock(curr, hlock, &usage))
return 0;
if (curr->softirqs_enabled) {
usage.bit = LOCK_ENABLED_SOFTIRQ_READ;
+ usage.vector = local_softirq_enabled();
if (!mark_lock(curr, hlock, &usage))
return 0;
}
} else {
usage.bit = LOCK_ENABLED_HARDIRQ;
+ usage.vector = 0;
if (!mark_lock(curr, hlock, &usage))
return 0;
if (curr->softirqs_enabled) {
usage.bit = LOCK_ENABLED_SOFTIRQ;
+ usage.vector = local_softirq_enabled();
if (!mark_lock(curr, hlock, &usage))
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2019-02-12 17:16 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 17:13 [PATCH 00/32] softirq: Per vector masking v2 Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 01/32] locking/lockdep: Use expanded masks on find_usage_*() functions Frederic Weisbecker
2019-02-12 17:35 ` Linus Torvalds
2019-02-12 17:13 ` [PATCH 02/32] locking/lockdep: Introduce struct lock_usage Frederic Weisbecker
2019-02-12 17:38 ` Linus Torvalds
2019-02-13 14:56 ` Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 03/32] locking/lockdep: Convert usage_mask to u64 Frederic Weisbecker
2019-02-12 17:40 ` Linus Torvalds
2019-02-13 14:51 ` Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 04/32] locking/lockdep: Test all incompatible scenario at once in check_irq_usage() Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 05/32] locking/lockdep: Prepare valid_state() to handle plain masks Frederic Weisbecker
2019-02-12 17:45 ` Linus Torvalds
2019-02-13 15:16 ` Frederic Weisbecker
2019-02-13 19:47 ` Linus Torvalds
2019-02-21 3:53 ` Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 06/32] locking/lockdep: Prepare check_usage_*() " Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 07/32] locking/lockdep: Prepare state_verbose() to handle all softirqs Frederic Weisbecker
2019-02-12 17:13 ` [PATCH 08/32] locking/lockdep: Make mark_lock() fastpath to work with multiple usage at once Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 09/32] locking/lockdep: Save stack trace for each softirq vector involved Frederic Weisbecker
2019-02-12 17:47 ` Linus Torvalds
2019-02-13 15:18 ` Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 10/32] locking/lockdep: Make mark_lock() verbosity aware of vector Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 11/32] softirq: Macrofy softirq vectors Frederic Weisbecker
2019-02-27 9:54 ` Sebastian Andrzej Siewior
2019-02-27 23:08 ` Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 12/32] locking/lockdep: Define per vector softirq lock usage states Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 13/32] softirq: Pass softirq vector number to lockdep on vector execution Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 14/32] x86: Revert "x86/irq: Demote irq_cpustat_t::__softirq_pending to u16" Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 15/32] arch/softirq: Rename softirq_pending fields to softirq_data Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 16/32] softirq: Normalize softirq_pending naming scheme Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 17/32] softirq: Convert softirq_pending_*() to set/clear mask scheme Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 18/32] softirq: Introduce disabled softirq vectors bits Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 19/32] softirq: Rename _local_bh_enable() to local_bh_enable_no_softirq() Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 20/32] softirq: Move vectors bits to bottom_half.h Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 21/32] x86: Init softirq enabled field Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 22/32] softirq: Check enabled vectors before processing Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 23/32] softirq: Remove stale comment Frederic Weisbecker
2019-02-27 11:04 ` Sebastian Andrzej Siewior
2019-02-27 23:09 ` Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 24/32] softirq: Uninline !CONFIG_TRACE_IRQFLAGS __local_bh_disable_ip() Frederic Weisbecker
2019-02-27 11:14 ` Sebastian Andrzej Siewior
2019-02-27 23:14 ` Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 25/32] softirq: Prepare for mixing all/per-vector masking Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 26/32] softirq: Support per vector masking Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 27/32] locking/lockdep: Remove redundant softirqs on check Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 28/32] locking/lockdep: Update check_flags() according to new layout Frederic Weisbecker
2019-02-12 17:14 ` Frederic Weisbecker [this message]
2019-02-12 17:14 ` [PATCH 30/32] softirq: Allow to soft interrupt vector-specific masked contexts Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 31/32] locking: Introduce spin_[un]lock_bh_mask() Frederic Weisbecker
2019-02-12 17:14 ` [PATCH 32/32] net: Make softirq vector masking finegrained on release_sock() Frederic Weisbecker
2019-02-12 18:29 ` [PATCH 00/32] softirq: Per vector masking v2 David Miller
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