Received-SPF: pass (google.com: domain of linux-kernel+bounces-63116-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
Precedence: bulk
MIME-Version: 1.0
References: <20240212213922.783301-1-surenb@google.com> <20240212213922.783301-2-surenb@google.com>
In-Reply-To: <20240212213922.783301-2-surenb@google.com>
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Tue, 13 Feb 2024 10:26:48 +0200
Message-ID: <CAHp75Vek3DEYLHnpUDBo_bYSd-ksN_66=LQ5s0Z+EhnNvhybpw@mail.gmail.com>
Subject: Re: [PATCH v3 01/35] lib/string_helpers: Add flags param to string_get_size()
To: Suren Baghdasaryan <surenb@google.com>
Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev, mhocko@suse.com, 
	vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, 
	dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, 
	corbet@lwn.net, void@manifault.com, peterz@infradead.org, 
	juri.lelli@redhat.com, catalin.marinas@arm.com, will@kernel.org, 
	arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, 
	dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, 
	david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, 
	nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, 
	rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, 
	yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, 
	hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, 
	ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, 
	ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, 
	dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, 
	bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, 
	iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, 
	elver@google.com, dvyukov@google.com, shakeelb@google.com, 
	songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, 
	minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, 
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, 
	iommu@lists.linux.dev, linux-arch@vger.kernel.org, 
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, 
	linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, 
	cgroups@vger.kernel.org, Andy Shevchenko <andy@kernel.org>, 
	Michael Ellerman <mpe@ellerman.id.au>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, 
	Paul Mackerras <paulus@samba.org>, "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>, 
	=?UTF-8?Q?Noralf_Tr=C3=B8nnes?= <noralf@tronnes.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Mon, Feb 12, 2024 at 11:39=E2=80=AFPM Suren Baghdasaryan <surenb@google.=
com> wrote:
>
> From: Kent Overstreet <kent.overstreet@linux.dev>
>
> The new flags parameter allows controlling
>  - Whether or not the units suffix is separated by a space, for
>    compatibility with sort -h
>  - Whether or not to append a B suffix - we're not always printing
>    bytes.
>
> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>

It seems most of my points from the previous review were refused...

..

You can move the below under --- cutter, so it won't pollute the git histor=
y.

> Cc: Andy Shevchenko <andy@kernel.org>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Jason Wang <jasowang@redhat.com>
> Cc: "Noralf Tr=C3=B8nnes" <noralf@tronnes.org>
> Cc: Jens Axboe <axboe@kernel.dk>
> ---

..

> --- a/include/linux/string_helpers.h
> +++ b/include/linux/string_helpers.h
> @@ -17,14 +17,13 @@ static inline bool string_is_terminated(const char *s=
, int len)

..

> -/* Descriptions of the types of units to
> - * print in */
> -enum string_size_units {
> -       STRING_UNITS_10,        /* use powers of 10^3 (standard SI) */
> -       STRING_UNITS_2,         /* use binary powers of 2^10 */
> +enum string_size_flags {
> +       STRING_SIZE_BASE2       =3D (1 << 0),
> +       STRING_SIZE_NOSPACE     =3D (1 << 1),
> +       STRING_SIZE_NOBYTES     =3D (1 << 2),
>  };

Do not kill documentation, I already said that. Or i.o.w. document this.
Also the _SIZE is ambigous (if you don't want UNITS, use SIZE_FORMAT.

Also why did you kill BASE10 here? (see below as well)

..

> --- a/lib/string_helpers.c
> +++ b/lib/string_helpers.c
> @@ -19,11 +19,17 @@
>  #include <linux/string.h>
>  #include <linux/string_helpers.h>
>
> +enum string_size_units {
> +       STRING_UNITS_10,        /* use powers of 10^3 (standard SI) */
> +       STRING_UNITS_2,         /* use binary powers of 2^10 */
> +};

Why do we need this duplication?

..

> +       enum string_size_units units =3D flags & flags & STRING_SIZE_BASE=
2
> +               ? STRING_UNITS_2 : STRING_UNITS_10;

Double flags check is redundant.

--=20
With Best Regards,
Andy Shevchenko