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SubjectRe: unusual scheduling performance
On Mon, 18 Nov 2002, Andrew Morton wrote:

> 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");
> +

Andrew, if you don't use epoll there's no way you get there. The function
eventpoll_file_init() initialize the list at each file* init in
fs/file_table.c
If you're not using epoll and you get there, someone is screwing up the
data inside the struct file



- Davide


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