linux-kernel - Re: [PATCH] [2/11] Add unlocked

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Message-Id: <20080519102920.fe46d7b5.randy.dunlap@oracle.com>
Date:	Mon, 19 May 2008 10:29:20 -0700
From:	Randy Dunlap <randy.dunlap@...CLE.COM>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	corbet@....net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [2/11] Add unlocked_fasync

On Mon, 19 May 2008 14:31:11 +0200 (CEST) Andi Kleen wrote:

> Index: linux/Documentation/filesystems/vfs.txt
> ===================================================================
> --- linux.orig/Documentation/filesystems/vfs.txt
> +++ linux/Documentation/filesystems/vfs.txt
> @@ -755,6 +755,7 @@ struct file_operations {
>  	int (*fsync) (struct file *, struct dentry *, int datasync);
>  	int (*aio_fsync) (struct kiocb *, int datasync);
>  	int (*fasync) (int, struct file *, int);
> +	int (*unlocked_fasync) (int, struct file *, int);
>  	int (*lock) (struct file *, int, struct file_lock *);
>  	ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
>  	ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
> @@ -814,7 +815,9 @@ otherwise noted.
>    fsync: called by the fsync(2) system call
>  
>    fasync: called by the fcntl(2) system call when asynchronous
> -	(non-blocking) mode is enabled for a file
> +	(non-blocking) mode is enabled for a file. BKL hold

?                                                  BKL is held.

> +
> +  unlocked_fasync: like fasync, but without BKL
>  
>    lock: called by the fcntl(2) system call for F_GETLK, F_SETLK, and F_SETLKW
>    	commands


---
~Randy
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