Re: 2.6.20 BUG: soft lockup detected on CPU#0!

Ingo Molnar
2007-02-08T09:56:53Z

* Eric Dumazet <dada1@cosmosbay.com> wrote:

> This reminds me the current problem in close_files()
> code, where we trigger soft lockup quite regularly.
>
> Is there any chance/interest we can solve the issue Andrew had with
> this patch ?
>
> http://lkml.org/lkml/2006/5/2/273

yes - the -rt patch included the patch below for more than 2 years.
(note that this one is even more finegrained)

Ingo

Index: linux/kernel/exit.c
===================================================================
--- linux.orig/kernel/exit.c
+++ linux/kernel/exit.c
@@ -431,8 +433,10 @@ static void close_files(struct files_str
while (set) {
if (set & 1) {
struct file * file = xchg(&fdt->fd[i], NULL);
- if (file)
+ if (file) {
filp_close(file, files);
+ cond_resched();
+ }
}
i++;
set >>= 1;