linux-kernel - Re: [PATCH v3 01/35] lib/string_helpers: Add flags param to string_get

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Message-ID: <CAHp75VcftSPtAjOH-96wdyVhAYWAbOzZtfgm6J2Vwt1=-QTb=Q@mail.gmail.com>
Date: Tue, 13 Feb 2024 10:29:34 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Suren Baghdasaryan <surenb@...gle.com>
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	Noralf Trønnes <noralf@...nnes.org>
Subject: Re: [PATCH v3 01/35] lib/string_helpers: Add flags param to string_get_size()

On Tue, Feb 13, 2024 at 10:26 AM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Mon, Feb 12, 2024 at 11:39 PM Suren Baghdasaryan <surenb@...gle.com> wrote:
> >
> > From: Kent Overstreet <kent.overstreet@...ux.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.

And you effectively missed to _add_ the test cases for the modified code.
Formal NAK for this, the rest is discussable, the absence of tests is not.

> > Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
> > Signed-off-by: Suren Baghdasaryan <surenb@...gle.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 history.
>
> > Cc: Andy Shevchenko <andy@...nel.org>
> > Cc: Michael Ellerman <mpe@...erman.id.au>
> > Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> > Cc: Paul Mackerras <paulus@...ba.org>
> > Cc: "Michael S. Tsirkin" <mst@...hat.com>
> > Cc: Jason Wang <jasowang@...hat.com>
> > Cc: "Noralf Trønnes" <noralf@...nnes.org>
> > Cc: Jens Axboe <axboe@...nel.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       = (1 << 0),
> > +       STRING_SIZE_NOSPACE     = (1 << 1),
> > +       STRING_SIZE_NOBYTES     = (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 = flags & flags & STRING_SIZE_BASE2
> > +               ? STRING_UNITS_2 : STRING_UNITS_10;
>
> Double flags check is redundant.



-- 
With Best Regards,
Andy Shevchenko