Re: [PATCH] fix recursive nlm_file_mutex deadlock

[Wendy Cheng <wcheng@redhat.com>]

Wendy Cheng wrote:

>
> The attached patch seems to fix the issue - it skips (defers) the file 
> removal. Eventually either nlm_gc_hosts (some time later when client 
> is unmonitored) or nlmsvc_traverse_files will finish the clean up.  
> Note that this is a 10-minutes  work - not sure its ramification at 
> this moment. Take a look ?
>
Well, I never really understand what this "signed-off" line is all 
about. But if it is required, here it is:

Signed-off-by: S. Wendy Cheng (wcheng@redhat.com)


>
>------------------------------------------------------------------------
>
>--- linux-2/fs/lockd/svclock.c	2006-08-08 10:20:16.000000000 -0400
>+++ linux/fs/lockd/svclock.c	2006-08-09 10:28:35.000000000 -0400
>@@ -264,7 +264,9 @@ static void nlmsvc_free_block(struct kre
> 
> 	nlmsvc_freegrantargs(block->b_call);
> 	nlm_release_call(block->b_call);
>-	nlm_release_file(block->b_file);
>+	down(&file->f_sema);
>+	file->f_count--;
>+	up(&file->f_sema);
> 	kfree(block);
> }
> 
>  
>

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