Re: unusual scheduling performance

[Andrew Morton <akpm@digeo.com>]

Dave Hansen wrote:
> 
> ...
>      rwsem_down_write_failed:           133    133

Possible culprit.

Please stick a dump_stack() in rwsem_down_write_failed(), and add the below.
Suggest you stick with 2.5.47 to diagnose this.  The loss of kksymoops
is a pain.


 fs/eventpoll.c |    2 ++
 1 files changed, 2 insertions(+)

--- 25/fs/eventpoll.c~hey	Mon Nov 18 10:13:40 2002
+++ 25-akpm/fs/eventpoll.c	Mon Nov 18 10:14:01 2002
@@ -328,6 +328,8 @@ void eventpoll_release(struct file *file
 	if (list_empty(lsthead))
 		return;
 
+	printk("hey!\n");
+
 	/*
 	 * We don't want to get "file->f_ep_lock" because it is not
 	 * necessary. It is not necessary because we're in the "struct file"

_