From: Yuyang Du <duyuyang@gmail.com>
To: peterz@infradead.org, will.deacon@arm.com, mingo@kernel.org
Cc: bvanassche@acm.org, ming.lei@redhat.com, frederic@kernel.org,
tglx@linutronix.de, linux-kernel@vger.kernel.org,
longman@redhat.com, paulmck@linux.vnet.ibm.com,
boqun.feng@gmail.com, Yuyang Du <duyuyang@gmail.com>
Subject: [PATCH v3 20/30] locking/lockdep: Introduce chain_hlocks_type for held lock's read-write type
Date: Fri, 28 Jun 2019 17:15:18 +0800 [thread overview]
Message-ID: <20190628091528.17059-21-duyuyang@gmail.com> (raw)
In-Reply-To: <20190628091528.17059-1-duyuyang@gmail.com>
Lock chain needs to include information about the read-write lock type. To
that end, introduce:
chain_hlocks_type[MAX_LOCKDEP_CHAIN_HLOCKS]
in addition to:
chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS]
Signed-off-by: Yuyang Du <duyuyang@gmail.com>
---
kernel/locking/lockdep.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 2329add..27eeacc 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -882,6 +882,7 @@ static bool class_lock_list_valid(struct lock_class *c, int forward)
#ifdef CONFIG_PROVE_LOCKING
static u16 chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS];
+static u16 chain_hlocks_type[MAX_LOCKDEP_CHAIN_HLOCKS];
#endif
static bool check_lock_chain_key(struct lock_chain *chain)
@@ -2592,6 +2593,7 @@ static inline void inc_chains(void)
static DECLARE_BITMAP(lock_chains_in_use, MAX_LOCKDEP_CHAINS);
int nr_chain_hlocks;
static u16 chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS];
+static u16 chain_hlocks_type[MAX_LOCKDEP_CHAIN_HLOCKS];
struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i)
{
@@ -2795,9 +2797,13 @@ static inline struct lock_chain *add_chain_cache(struct task_struct *curr,
chain->base = nr_chain_hlocks;
for (j = 0; j < chain->depth - 1; j++, i++) {
int lock_id = curr->held_locks[i].class_idx;
+ int lock_type = curr->held_locks[i].read;
+
chain_hlocks[chain->base + j] = lock_id;
+ chain_hlocks_type[chain->base + j] = lock_type;
}
chain_hlocks[chain->base + j] = class - lock_classes;
+ chain_hlocks_type[chain->base + j] = hlock->read;
nr_chain_hlocks += chain->depth;
} else {
if (!debug_locks_off_graph_unlock())
@@ -4811,6 +4817,9 @@ static void remove_class_from_lock_chain(struct pending_free *pf,
memmove(&chain_hlocks[i], &chain_hlocks[i + 1],
(chain->base + chain->depth - i) *
sizeof(chain_hlocks[0]));
+ memmove(&chain_hlocks_type[i], &chain_hlocks_type[i + 1],
+ (chain->base + chain->depth - i) *
+ sizeof(chain_hlocks_type[0]));
}
/*
* Each lock class occurs at most once in a lock chain so once
@@ -5278,6 +5287,7 @@ void __init lockdep_init(void)
+ sizeof(lock_chains_in_use)
+ sizeof(lock_chains_in_dep)
+ sizeof(chain_hlocks)
+ + sizeof(chain_hlocks_type)
#endif
) / 1024
);
--
1.8.3.1
next prev parent reply other threads:[~2019-06-28 9:17 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-28 9:14 [PATCH v3 00/30] Support recursive-read lock deadlock detection Yuyang Du
2019-06-28 9:14 ` [PATCH v3 01/30] locking/lockdep: Rename deadlock check functions Yuyang Du
2019-06-28 9:15 ` [PATCH v3 02/30] locking/lockdep: Change return type of add_chain_cache() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 03/30] locking/lockdep: Change return type of lookup_chain_cache_add() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 04/30] locking/lockdep: Pass lock chain from validate_chain() to check_prev_add() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 05/30] locking/lockdep: Add lock chain list_head field in struct lock_list and lock_chain Yuyang Du
2019-06-28 9:15 ` [PATCH v3 06/30] locking/lockdep: Update comments in struct lock_list and held_lock Yuyang Du
2019-06-28 9:15 ` [PATCH v3 07/30] locking/lockdep: Remove indirect dependency redundancy check Yuyang Du
2019-06-28 9:15 ` [PATCH v3 08/30] locking/lockdep: Skip checks if direct dependency is already present Yuyang Du
2019-06-28 9:15 ` [PATCH v3 09/30] locking/lockdep: Remove chain_head argument in validate_chain() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 10/30] locking/lockdep: Remove useless lock type assignment Yuyang Du
2019-06-28 9:15 ` [PATCH v3 11/30] locking/lockdep: Specify the depth of current lock stack in lookup_chain_cache_add() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 12/30] locking/lockdep: Treat every lock dependency as in a new lock chain Yuyang Du
2019-06-28 9:15 ` [PATCH v3 13/30] locking/lockdep: Combine lock_lists in struct lock_class into an array Yuyang Du
2019-06-28 9:15 ` [PATCH v3 14/30] locking/lockdep: Consolidate forward and backward lock_lists into one Yuyang Du
2019-06-28 9:15 ` [PATCH v3 15/30] locking/lockdep: Add lock chains to direct lock dependency graph Yuyang Du
2019-06-28 9:15 ` [PATCH v3 16/30] locking/lockdep: Use lock type enum to explicitly specify read or write locks Yuyang Du
2019-06-28 9:15 ` [PATCH v3 17/30] locking/lockdep: Add read-write type for a lock dependency Yuyang Du
2019-07-10 5:18 ` Boqun Feng
2019-07-11 5:02 ` Yuyang Du
2019-06-28 9:15 ` [PATCH v3 18/30] locking/lockdep: Add helper functions to operate on the searched path Yuyang Du
2019-06-28 9:15 ` [PATCH v3 19/30] locking/lockdep: Update direct dependency's read-write type if it exists Yuyang Du
2019-06-28 9:15 ` Yuyang Du [this message]
2019-06-28 9:15 ` [PATCH v3 21/30] locking/lockdep: Hash held lock's read-write type into chain key Yuyang Du
2019-06-28 9:15 ` [PATCH v3 22/30] locking/lockdep: Adjust BFS algorithm to support multiple matches Yuyang Du
2019-06-28 9:15 ` [PATCH v3 23/30] locking/lockdep: Define the two task model for lockdep checks formally Yuyang Du
2019-06-28 9:15 ` [PATCH v3 24/30] locking/lockdep: Introduce mark_lock_unaccessed() Yuyang Du
2019-06-28 9:15 ` [PATCH v3 25/30] locking/lockdep: Add nest lock type Yuyang Du
2019-06-28 9:15 ` [PATCH v3 26/30] locking/lockdep: Add lock exclusiveness table Yuyang Du
2019-06-28 9:15 ` [PATCH v3 27/30] locking/lockdep: Support read-write lock's deadlock detection Yuyang Du
2019-06-28 9:15 ` [PATCH v3 28/30] locking/lockdep: Adjust selftest case for recursive read lock Yuyang Du
2019-06-28 9:15 ` [PATCH v3 29/30] locking/lockdep: Add more lockdep selftest cases Yuyang Du
2019-06-28 9:15 ` [PATCH v3 30/30] locking/lockdep: Remove irq-safe to irq-unsafe read check Yuyang Du
2019-07-10 5:30 ` Boqun Feng
2019-07-10 6:30 ` Yuyang Du
2019-07-10 1:54 ` [PATCH v3 00/30] Support recursive-read lock deadlock detection Yuyang Du
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