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From: Jiri Kosina <jkosina@suse.cz>
To: Jiri Olsa <olsajiri@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
	Nadia Derbey <Nadia.Derbey@bull.net>,
	peifferp@gmail.com
Subject: Re: [BUG] soft lockup detected with ipcs
Date: Sun, 2 Mar 2008 22:26:06 +0100 (CET)	[thread overview]
Message-ID: <Pine.LNX.4.64.0803022223360.15209@jikos.suse.cz> (raw)
In-Reply-To: <Pine.LNX.4.64.0803022214190.15209@jikos.suse.cz>

On Sun, 2 Mar 2008, Jiri Kosina wrote:

> Could you please try what is the output with the attached patch below, so 
> that we know which spinlock buggers?

Uhm, and hereby I attach the patch.

diff --git a/ipc/shm.c b/ipc/shm.c
index c47e872..2abfb70 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -615,6 +615,7 @@ static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss,
 			*rss += (HPAGE_SIZE/PAGE_SIZE)*mapping->nrpages;
 		} else {
 			struct shmem_inode_info *info = SHMEM_I(inode);
+			printk(KERN_DEBUG "info: %p\n", info);
 			spin_lock(&info->lock);
 			*rss += inode->i_mapping->nrpages;
 			*swp += info->swapped;
diff --git a/ipc/util.c b/ipc/util.c
index fd1b50d..5a0d4d2 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -662,6 +662,7 @@ struct kern_ipc_perm *ipc_lock(struct ipc_ids *ids, int id)
 
 	up_read(&ids->rw_mutex);
 
+	printk(KERN_DEBUG "out: %p\n", out);
 	spin_lock(&out->lock);
 	
 	/* ipc_rmid() may have already freed the ID while ipc_lock

  reply	other threads:[~2008-03-02 21:26 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 10:46 Jiri Olsa
2008-02-29 10:57 ` Andrew Morton
2008-02-29 11:01   ` Jiri Olsa
2008-02-29 11:29     ` Andrew Morton
2008-02-29 11:35       ` Jiri Olsa
2008-02-29 11:43 ` Jiri Kosina
2008-03-02 17:45   ` Jiri Olsa
2008-03-02 20:02     ` Andrew Morton
2008-03-02 21:23       ` Jiri Kosina
2008-03-02 21:26         ` Jiri Kosina [this message]
2008-03-03 12:00           ` Jiri Olsa
2008-03-03 12:06             ` Jiri Kosina
2008-03-03 12:19               ` Jiri Olsa
2008-03-03 12:28                 ` Jiri Kosina
2008-03-03 12:38                   ` Jiri Olsa
2008-03-03 14:04                     ` Jiri Olsa
2008-03-03 14:45                       ` Jiri Kosina
2008-03-04  9:56                         ` Jiri Olsa
2008-03-04 12:57                           ` Jiri Olsa

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