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Re: [Xen-devel] [PATCH RFC V2 01/45] xen/sched: add inline wrappers for calling per-scheduler functions
- To: Juergen Gross <jgross@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: George Dunlap <george.dunlap@xxxxxxxxxx>
- Date: Wed, 8 May 2019 17:24:53 +0100
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- Cc: Tim Deegan <tim@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Wed, 08 May 2019 16:25:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 5/6/19 7:56 AM, Juergen Gross wrote:
> Instead of using the SCHED_OP() macro to call the different scheduler
> specific functions add inline wrappers for that purpose.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
This seems like a great idea. One minor comment...
> +static inline int sched_init(struct scheduler *s)
> +{
> + ASSERT(s->init);
> + return s->init(s);
> +}
> +
> +static inline void sched_deinit(struct scheduler *s)
> +{
> + ASSERT(s->deinit);
> + s->deinit(s);
> +}
I think these would better as BUG_ON()s. These aren't hot paths, and if
we do somehow hit this situation in production, 1) it's safer to
BUG_ON() than dereferencing NULL, and 2) you'll get a more helpful error
message.
Everything else LGTM.
-George
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