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From: "Jürgen Groß" <jgross@suse.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: George Dunlap <george.dunlap@citrix.com>,
	Dario Faggioli <dfaggioli@suse.com>,
	xen-devel@lists.xenproject.org
Subject: Re: [PATCH v2 06/17] xen/cpupool: use ERR_PTR() for returning error cause from cpupool_create()
Date: Wed, 2 Dec 2020 11:58:05 +0100	[thread overview]
Message-ID: <17387dc8-1a10-e822-f38c-1dcd8eac2f62@suse.com> (raw)
In-Reply-To: <841e972f-4b46-e606-3344-c6ba423acf5c@suse.com>


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On 02.12.20 11:46, Jan Beulich wrote:
> On 02.12.2020 10:56, Jürgen Groß wrote:
>> On 02.12.20 09:58, Jan Beulich wrote:
>>> On 01.12.2020 09:21, Juergen Gross wrote:
>>>> Instead of a pointer to an error variable as parameter just use
>>>> ERR_PTR() to return the cause of an error in cpupool_create().
>>>>
>>>> This propagates to scheduler_alloc(), too.
>>>>
>>>> Signed-off-by: Juergen Gross <jgross@suse.com>
>>>
>>> Reviewed-by: Jan Beulich <jbeulich@suse.com>
>>> with one small question:
>>>
>>>> --- a/xen/common/sched/core.c
>>>> +++ b/xen/common/sched/core.c
>>>> @@ -3233,26 +3233,25 @@ struct scheduler *scheduler_get_default(void)
>>>>        return &ops;
>>>>    }
>>>>    
>>>> -struct scheduler *scheduler_alloc(unsigned int sched_id, int *perr)
>>>> +struct scheduler *scheduler_alloc(unsigned int sched_id)
>>>>    {
>>>>        int i;
>>>> +    int ret;
>>>
>>> I guess you didn't merge this with i's declaration because of a
>>> plan/hope for i to be converted to unsigned int?
>>
>> The main reason is I don't like overloading variables this way.
> 
> That's no what I asked. I was wondering why the new decl wasn't
> 
>      int i, ret;

Oh, then I completely misunderstood your question, sorry.

I had no special reason when writing the patch, but I think changing
i to be unsigned is a good idea. I'll do that in the next iteration.


Juergen

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  reply	other threads:[~2020-12-02 10:58 UTC|newest]

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-01  8:21 [PATCH v2 00/17] xen: support per-cpupool scheduling granularity Juergen Gross
2020-12-01  8:21 ` [PATCH v2 01/17] xen/cpupool: add cpu to sched_res_mask when removing it from cpupool Juergen Gross
2020-12-01  8:21 ` [PATCH v2 02/17] xen/cpupool: add missing bits for per-cpupool scheduling granularity Juergen Gross
2020-12-01  8:21 ` [PATCH v2 03/17] xen/cpupool: sort included headers in cpupool.c Juergen Gross
2020-12-01  8:21 ` [PATCH v2 04/17] xen/cpupool: switch cpupool id to unsigned Juergen Gross
2020-12-01  8:55   ` Jan Beulich
2020-12-01  9:01     ` Jürgen Groß
2020-12-01  9:07       ` Jan Beulich
2020-12-07  9:59       ` Jan Beulich
2020-12-07 14:48         ` Jürgen Groß
2020-12-07 15:00           ` Jan Beulich
2020-12-04 15:52   ` Dario Faggioli
2020-12-07  9:58     ` Jan Beulich
2020-12-07 15:21     ` Jan Beulich
2020-12-01  8:21 ` [PATCH v2 05/17] xen/cpupool: switch cpupool list to normal list interface Juergen Gross
2020-12-01  9:12   ` Jan Beulich
2020-12-01  9:18     ` Jürgen Groß
2020-12-04 16:13       ` Dario Faggioli
2020-12-04 16:16         ` Jürgen Groß
2020-12-04 16:25           ` Dario Faggioli
2020-12-04 16:56   ` Dario Faggioli
2020-12-01  8:21 ` [PATCH v2 06/17] xen/cpupool: use ERR_PTR() for returning error cause from cpupool_create() Juergen Gross
2020-12-02  8:58   ` Jan Beulich
2020-12-02  9:56     ` Jürgen Groß
2020-12-02 10:46       ` Jan Beulich
2020-12-02 10:58         ` Jürgen Groß [this message]
2020-12-04 16:29   ` Dario Faggioli
2020-12-01  8:21 ` [PATCH v2 07/17] xen/cpupool: support moving domain between cpupools with different granularity Juergen Gross
2020-12-01  8:21 ` [PATCH v2 08/17] docs: fix hypfs path documentation Juergen Gross
2020-12-01  8:21 ` [PATCH v2 09/17] xen/hypfs: move per-node function pointers into a dedicated struct Juergen Gross
2020-12-02 15:36   ` Jan Beulich
2020-12-02 15:41     ` Jürgen Groß
2020-12-03  8:47     ` Jürgen Groß
2020-12-03  9:12       ` Jan Beulich
2020-12-03  9:51         ` Jürgen Groß
2020-12-01  8:21 ` [PATCH v2 10/17] xen/hypfs: pass real failure reason up from hypfs_get_entry() Juergen Gross
2020-12-01  8:21 ` [PATCH v2 11/17] xen/hypfs: add getsize() and findentry() callbacks to hypfs_funcs Juergen Gross
2020-12-02 15:42   ` Jan Beulich
2020-12-02 15:51     ` Jürgen Groß
2020-12-03  8:12       ` Jan Beulich
2020-12-03  9:39         ` Jürgen Groß
2020-12-04  8:58   ` Jan Beulich
2020-12-04 11:14     ` Jürgen Groß
2020-12-01  8:21 ` [PATCH v2 12/17] xen/hypfs: add new enter() and exit() per node callbacks Juergen Gross
2020-12-03 14:59   ` Jan Beulich
2020-12-03 15:14     ` Jürgen Groß
2020-12-03 15:29       ` Jan Beulich
2020-12-04  8:33         ` Jürgen Groß
2020-12-04  8:30   ` Jan Beulich
2020-12-04  8:35     ` Jürgen Groß
2020-12-01  8:21 ` [PATCH v2 13/17] xen/hypfs: support dynamic hypfs nodes Juergen Gross
2020-12-03 15:08   ` Jan Beulich
2020-12-03 15:18     ` Jürgen Groß
2020-12-01  8:21 ` [PATCH v2 14/17] xen/hypfs: add support for id-based dynamic directories Juergen Gross
2020-12-03 15:44   ` Jan Beulich
2020-12-04  8:52     ` Jürgen Groß
2020-12-04  9:16       ` Jan Beulich
2020-12-04 13:08         ` Jürgen Groß
2020-12-07  7:54           ` Jan Beulich
2020-12-01  8:21 ` [PATCH v2 15/17] xen/cpupool: add cpupool directories Juergen Gross
2020-12-01  9:00   ` Jan Beulich
2020-12-01  9:03     ` Jürgen Groß
2020-12-02 15:46   ` Jürgen Groß
2020-12-03 14:46     ` Jan Beulich
2020-12-03 15:11       ` Jürgen Groß
2020-12-04  9:10   ` Jan Beulich
2020-12-04 11:08     ` Jürgen Groß
2020-12-04 11:54       ` Jan Beulich
2020-12-01  8:21 ` [PATCH v2 16/17] xen/cpupool: add scheduling granularity entry to cpupool entries Juergen Gross
2020-12-01  8:21 ` [PATCH v2 17/17] xen/cpupool: make per-cpupool sched-gran hypfs node writable Juergen Gross
2020-12-04 23:53 ` [PATCH v2 00/17] xen: support per-cpupool scheduling granularity Andrew Cooper
2020-12-05  7:41   ` Jürgen Groß
2020-12-07  9:00   ` Jan Beulich

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