linux-kernel - Re: [patch] [bugfix] loop.c

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Date:	Fri, 23 Mar 2007 14:56:22 +0000
From:	Al Viro <viro@....linux.org.uk>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	Tomas M <tomas@...x.org>, linux-kernel@...r.kernel.org
Subject: Re: [patch] [bugfix] loop.c

On Fri, Mar 23, 2007 at 03:48:09PM +0100, Eric Dumazet wrote:
> On Fri, 23 Mar 2007 14:36:05 +0000
> Al Viro <viro@....linux.org.uk> wrote:
> 
> > On Fri, Mar 23, 2007 at 03:19:56PM +0100, Eric Dumazet wrote:
> > > I cooked the following patch (untested), feel free to test it.
> > 
> > Please, get the cleanup into saner shape.  This is too ugly.
> 
> out_mem:
>         while (nba--)
>                 blk_cleanup_queue(loop_dev[nba]->lo_queue);
>         while (nbl--) {
>                 put_disk(loop_dev[nbl]->lo_disk);
>                 kfree(loop_dev[nbl]);
>         }
>         if (loop_dev_vmalloced)
>                 vfree(loop_dev);
>         else
>                 kfree(loop_dev);
>         unregister_blkdev(LOOP_MAJOR, "loop");
> 
> 
> What is ugly in this code ?

Your counters.  Two loops instead of one (no reason to allocate queues in
a a separate loop).  vmalloc conditional on kmalloc failure.
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