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From: Borislav Petkov <bp@suse.de>
To: "Bae, Chang Seok" <chang.seok.bae@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>, x86-ml <x86@kernel.org>,
	"Brown, Len" <len.brown@intel.com>,
	"Hansen, Dave" <dave.hansen@intel.com>,
	"Liu, Jing2" <jing2.liu@intel.com>,
	"Shankar, Ravi V" <ravi.v.shankar@intel.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 05/21] x86/fpu/xstate: Add a new variable to indicate dynamic user states
Date: Tue, 19 Jan 2021 16:57:58 +0100	[thread overview]
Message-ID: <20210119155758.GF27634@zn.tnic> (raw)
In-Reply-To: <E7E5BE72-C3AB-4ABB-93B5-EF040595442E@intel.com>

On Fri, Jan 15, 2021 at 07:47:38PM +0000, Bae, Chang Seok wrote:
> On Jan 15, 2021, at 05:39, Borislav Petkov <bp@suse.de> wrote:
> > On Wed, Dec 23, 2020 at 07:57:01AM -0800, Chang S. Bae wrote:
> >> The perf has a buffer that is allocated on demand. The states saved in the
> > 
> > What's "the perf"? I hope to find out when I countinue reading…
> 
> Maybe it was better to write ‘Linux perf (tools)’ [1] here. Sorry for the
> confusion.

Well, I'm also confused as to what does the perf buffer have to do with
AMX?

> >> -#define XFEATURE_MASK_DYNAMIC (XFEATURE_MASK_LBR)
> >> +#define XFEATURE_MASK_SUPERVISOR_DYNAMIC (XFEATURE_MASK_LBR)
> > 
> > Is XFEATURE_MASK_USER_DYNAMIC coming too?
> 
> Instead of the new define, I thought the new variable --
> xfeatures_mask_user_dynamic, as its value needs to be determined at boot
> time.

Why isn't that in your commit message?

All I see a patch doing a bunch of renames, some unrelated blurb in the
commit message and I have no clue what's going on here and why you're
doing this. Your commit messages should contain simple english sentences
and explain *why* the change is needed - not *what* you're doing. The
*what* I can see from the diff itself, for the *why* I need a crystal
ball which I can't buy in any store.

So how about explaining the *why*?

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg

  reply	other threads:[~2021-01-19 16:01 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-23 15:56 [PATCH v3 00/21] x86: Support Intel Advanced Matrix Extensions Chang S. Bae
2020-12-23 15:56 ` [PATCH v3 01/21] x86/fpu/xstate: Modify initialization helper to handle both static and dynamic buffers Chang S. Bae
2021-01-15 12:40   ` Borislav Petkov
2020-12-23 15:56 ` [PATCH v3 02/21] x86/fpu/xstate: Modify state copy helpers " Chang S. Bae
2021-01-15 12:50   ` Borislav Petkov
2021-01-19 18:50     ` Bae, Chang Seok
2021-01-20 20:53       ` Borislav Petkov
2021-01-20 21:12         ` Bae, Chang Seok
2020-12-23 15:56 ` [PATCH v3 03/21] x86/fpu/xstate: Modify address finders " Chang S. Bae
2021-01-15 13:06   ` Borislav Petkov
2020-12-23 15:57 ` [PATCH v3 04/21] x86/fpu/xstate: Modify context switch helpers " Chang S. Bae
2021-01-15 13:18   ` Borislav Petkov
2021-01-19 18:49     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 05/21] x86/fpu/xstate: Add a new variable to indicate dynamic user states Chang S. Bae
2021-01-15 13:39   ` Borislav Petkov
2021-01-15 19:47     ` Bae, Chang Seok
2021-01-19 15:57       ` Borislav Petkov [this message]
2021-01-19 18:57         ` Bae, Chang Seok
2021-01-22 10:56           ` Borislav Petkov
2021-01-27  1:23             ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 06/21] x86/fpu/xstate: Calculate and remember dynamic xstate buffer sizes Chang S. Bae
2021-01-22 11:44   ` Borislav Petkov
2021-01-27  1:23     ` Bae, Chang Seok
2021-01-27  9:38       ` Borislav Petkov
2021-02-03  2:54         ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 07/21] x86/fpu/xstate: Introduce helpers to manage dynamic xstate buffers Chang S. Bae
2021-01-26 20:17   ` Borislav Petkov
2021-01-27  1:23     ` Bae, Chang Seok
2021-01-27 10:41       ` Borislav Petkov
2021-02-03  4:10         ` Bae, Chang Seok
2021-02-04 13:10           ` Borislav Petkov
2021-02-03  4:10     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 08/21] x86/fpu/xstate: Define the scope of the initial xstate data Chang S. Bae
2021-02-08 12:33   ` Borislav Petkov
2021-02-08 18:53     ` Bae, Chang Seok
2021-02-09 12:49       ` Borislav Petkov
2021-02-09 15:38         ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 09/21] x86/fpu/xstate: Introduce wrapper functions to organize xstate buffer access Chang S. Bae
2021-02-08 12:33   ` Borislav Petkov
2021-02-09 15:50     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 10/21] x86/fpu/xstate: Update xstate save function to support dynamic xstate Chang S. Bae
2021-01-07  8:41   ` Liu, Jing2
2021-01-07 18:40     ` Bae, Chang Seok
2021-01-12  2:52       ` Liu, Jing2
2021-01-15  4:59         ` Bae, Chang Seok
2021-01-15  5:45           ` Liu, Jing2
2021-02-08 12:33   ` Borislav Petkov
2021-02-09 15:48     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 11/21] x86/fpu/xstate: Update xstate buffer address finder " Chang S. Bae
2021-02-19 15:00   ` Borislav Petkov
2021-02-19 19:19     ` Bae, Chang Seok
2020-12-23 15:57 ` [PATCH v3 12/21] x86/fpu/xstate: Update xstate context copy function to support dynamic buffer Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 13/21] x86/fpu/xstate: Expand dynamic context switch buffer on first use Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 14/21] x86/fpu/xstate: Support ptracer-induced xstate buffer expansion Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 15/21] x86/fpu/xstate: Extend the table to map xstate components with features Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 16/21] x86/cpufeatures/amx: Enumerate Advanced Matrix Extension (AMX) feature bits Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 17/21] x86/fpu/amx: Define AMX state components and have it used for boot-time checks Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 18/21] x86/fpu/amx: Enable the AMX feature in 64-bit mode Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 19/21] selftest/x86/amx: Include test cases for the AMX state management Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 20/21] x86/fpu/xstate: Support dynamic user state in the signal handling path Chang S. Bae
2020-12-23 15:57 ` [PATCH v3 21/21] x86/fpu/xstate: Introduce boot-parameters to control some state component support Chang S. Bae
2020-12-23 18:37   ` Randy Dunlap
2021-01-14 21:31     ` Bae, Chang Seok
2021-01-14 21:31 ` [PATCH v3 00/21] x86: Support Intel Advanced Matrix Extensions Bae, Chang Seok

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