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From: Davidlohr Bueso <dave@stgolabs.net>
To: mingo@kernel.org, peterz@infradead.org, akpm@linux-foundation.org
Cc: jack@suse.cz, kirill.shutemov@linux.intel.com,
	ldufour@linux.vnet.ibm.com, mhocko@suse.com,
	mgorman@techsingularity.net, dave@stgolabs.net,
	linux-kernel@vger.kernel.org, Davidlohr Bueso <dbueso@suse.de>
Subject: [PATCH 3/6] locking/locktorture: Fix rwsem reader_delay
Date: Thu,  6 Apr 2017 01:46:17 -0700	[thread overview]
Message-ID: <20170406084620.22700-4-dave@stgolabs.net> (raw)
In-Reply-To: <20170406084620.22700-1-dave@stgolabs.net>

We should account for nreader threads, not writers in this
callback. Could even trigger a div by 0 if the user explicitly
disables writers.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
---
 kernel/locking/locktorture.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index f24582d4dad3..0ef5510f8742 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -570,7 +570,7 @@ static void torture_rwsem_read_delay(struct torture_random_state *trsp)
 
 	/* We want a long delay occasionally to force massive contention.  */
 	if (!(torture_random(trsp) %
-	      (cxt.nrealwriters_stress * 2000 * longdelay_ms)))
+	      (cxt.nrealreaders_stress * 2000 * longdelay_ms)))
 		mdelay(longdelay_ms * 2);
 	else
 		mdelay(longdelay_ms / 2);
-- 
2.12.0

  parent reply	other threads:[~2017-04-06  8:52 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-06  8:46 [PATCH v2 -tip 0/6] locking: Introduce range reader/writer lock Davidlohr Bueso
2017-04-06  8:46 ` [PATCH 1/6] interval-tree: Build unconditionally Davidlohr Bueso
2017-04-06  8:46 ` [PATCH 2/6] locking: Introduce range reader/writer lock Davidlohr Bueso
2017-04-06  9:01   ` Laurent Dufour
2017-04-06 16:50     ` Davidlohr Bueso
2017-04-13  8:07       ` Laurent Dufour
2017-04-13  8:38         ` Jan Kara
2017-04-13  8:58           ` Laurent Dufour
2017-04-06 10:24   ` Peter Zijlstra
2017-04-18 13:57   ` Laurent Dufour
2017-04-20 16:01     ` Davidlohr Bueso
2017-04-21  7:00       ` Laurent Dufour
2017-04-06  8:46 ` Davidlohr Bueso [this message]
2017-04-06  8:46 ` [PATCH 4/6] locking/locktorture: Fix num reader/writer corner cases Davidlohr Bueso
2017-04-06  8:46 ` [PATCH 5/6] locking/locktorture: Support range rwlocks Davidlohr Bueso
2017-04-06  8:46 ` [PATCH 6/6] staging/lustre: Use generic range rwlock Davidlohr Bueso
2017-04-07 10:08   ` Dilger, Andreas
2017-04-07 10:08     ` [lustre-devel] " Dilger, Andreas
2017-04-19 12:37 ` [PATCH v2 -tip 0/6] locking: Introduce range reader/writer lock Peter Zijlstra
2017-04-20 17:13   ` Davidlohr Bueso
2017-04-20 17:53     ` Peter Zijlstra
2017-04-20 18:36       ` Davidlohr Bueso
2017-04-20 19:10         ` Peter Zijlstra
2017-05-15  9:19           ` Davidlohr Bueso
2017-05-15  9:07 [PATCH v3 " Davidlohr Bueso
2017-05-15  9:07 ` [PATCH 3/6] locking/locktorture: Fix rwsem reader_delay Davidlohr Bueso

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