linux-kernel - Re: [PATCH v5] x86: UV uv

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Message-ID: <20110524151910.GA23496@elte.hu>
Date:	Tue, 24 May 2011 17:19:10 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Cliff Wickman <cpw@....com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v5] x86: UV uv_tlb.c cleanup

Well, so you have changed this current sequence in uv_init_per_cpu():

>	...
>		return 1;

>  	kfree(uvhub_descs);
>  	kfree(uvhub_mask);
>       [ ...]
>  	return 0;

to:

> +       if (summarize_uvhub_sockets(nuvhubs, uvhub_descs, uvhub_mask))
> +               goto fail;

>  	kfree(uvhub_descs);
>  	kfree(uvhub_mask);
>       [ ...]
> +	init_per_cpu_tunables();
>  	return 0;
> +
> +fail:
> +	kfree(uvhub_descs);
> +	kfree(uvhub_mask);
> +	return 1;

Don't the kfree()s get changed - i.e. the patch has a side-effect?

And yes, while this might be a kmem leak fix, it is a fix and a *SIDE EFFECT* 
which i explicitly asked to be queued in a separate patch(es) from the large 
cleanup patch ...

The cleanup patch should be a cleanup of existing code - even if that code has 
bugs. Nothing more. Bug fixes are for different patches.

Thanks,

	Ingo
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