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From: Teng Long <dyroneteng@gmail.com>
To: peff@peff.net
Cc: avarab@gmail.com, derrickstolee@github.com, dyroneteng@gmail.com,
	git@vger.kernel.org, gitster@pobox.com, me@ttaylorr.com,
	tenglong.tl@alibaba-inc.com
Subject: Re: [PATCH v4 4/4] pack-bitmap.c: trace bitmap ignore logs when midx-bitmap is found
Date: Mon, 28 Nov 2022 20:37:40 +0800	[thread overview]
Message-ID: <20221128123740.54250-1-tenglong.tl@alibaba-inc.com> (raw)
In-Reply-To: <Y3vM3GZYFy+l006d@coredump.intra.peff.net>

Jeff King <peff@peff.net> writes:

> > From: Jeff King <peff@peff.net>
> >
> > We retained pack bitmaps as a quick recovery mechanism while
> > test-deploying midx bitmaps. This is an internal mechanism, and we
> > want to expose this rule externally through trace2 so that end users,
> > repo-maintainers, and debuggers know what is happening in the process.
>
> Re-reading this outside the context of the earlier thread, I think "this
> rule" is a little vague. Maybe:
>
>   When we find a midx bitmap, we do not bother checking for pack
>   bitmaps, since we can use only one. But since we will warn of unused
>   bitmaps via trace2, let's continue looking for pack bitmaps when
>   tracing is enabled.

Thanks. That's more clear and will be applies on next patch.

> > @@ -559,11 +557,20 @@ static int open_midx_bitmap(struct repository *r,
> >  static int open_bitmap(struct repository *r,
> >  		       struct bitmap_index *bitmap_git)
> >  {
> > +	int found = 0;
> > +
> >  	assert(!bitmap_git->map);
> >
> > -	if (!open_midx_bitmap(r, bitmap_git))
> > -		return 0;
> > -	return open_pack_bitmap(r, bitmap_git);
> > +	found = !open_midx_bitmap(r, bitmap_git);
>
> I think we can drop the initialization of "found = 0"; that value is
> unused, since we'll always assign to it (I think my initial attempt had
> setting it to 1 inside the conditional).
>
> It's not hurting anything functionally, but it makes the code slightly
> more confusing to read.

I agree it's not hurting here, it's OK for me to make the improvement
here. But I have a question, do we prefer to omit the initialization
in such scenarios if we make sure it will initialized correctly?

Thanks.

  parent reply	other threads:[~2022-11-28 12:38 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-26  7:09 [PATCH 0/1] pack-bitmap.c: avoid exposing absolute paths Teng Long
2022-08-26  7:09 ` [PATCH 1/1] " Teng Long
2022-08-26 16:34 ` [PATCH 0/1] " Junio C Hamano
2022-08-29  2:48   ` Teng Long
2022-10-26 21:42     ` Taylor Blau
2022-10-26 23:19       ` Ævar Arnfjörð Bjarmason
2022-10-31 13:20         ` Teng Long
2022-10-27 20:45       ` Jeff King
2022-10-30 18:42         ` Taylor Blau
2022-10-31 12:22           ` [PATCH 0/1] pack-bitmap.c: avoid exposing absolute paths Taylor Blau <me@ttaylorr.com> writes: Teng Long
2022-11-02  5:37         ` [PATCH 0/1] pack-bitmap.c: avoid exposing absolute paths Teng Long
2022-11-02  7:54           ` Jeff King
2022-11-02 13:52             ` Teng Long
2022-10-31 13:13       ` Teng Long
2022-11-03  1:00         ` Taylor Blau
2022-11-02  9:20 ` Ævar Arnfjörð Bjarmason
2022-11-02 13:04   ` Teng Long
2022-11-02 12:56 ` [PATCH v2 " Teng Long
2022-11-02 12:56   ` [PATCH v2 1/1] " Teng Long
2022-11-03  1:16     ` Taylor Blau
2022-11-03  9:35       ` Teng Long
2022-11-05  0:35         ` Taylor Blau
2022-11-03  1:21   ` [PATCH v2 0/1] " Taylor Blau
2022-11-03  8:42     ` Teng Long
2022-11-04  3:17   ` [PATCH v3 0/2] " Teng Long
2022-11-04  3:17     ` [PATCH v3 1/2] " Teng Long
2022-11-04 22:11       ` Taylor Blau
2022-11-04  3:17     ` [PATCH v3 2/2] pack-bitmap.c: remove unnecessary "open_pack_index()" calls Teng Long
2022-11-04 22:09       ` Taylor Blau
2022-11-04 22:13     ` [PATCH v3 0/2] pack-bitmap.c: avoid exposing absolute paths Taylor Blau
2022-11-10  7:10     ` Teng Long
2022-11-10  7:10       ` [PATCH v3 1/2] pack-bitmap.c: remove unnecessary "open_pack_index()" calls Teng Long
2022-11-14 22:03         ` Jeff King
2022-11-14 22:14           ` Taylor Blau
2022-11-14 22:31             ` Jeff King
2022-11-14 22:50               ` Taylor Blau
2022-11-10  7:10       ` [PATCH v3 2/2] pack-bitmap.c: avoid exposing absolute paths Teng Long
2022-11-11 22:26       ` [PATCH v3 0/2] " Taylor Blau
2022-11-14 22:23         ` Jeff King
2022-11-17 14:19           ` Teng Long
2022-11-17 15:03             ` Jeff King
2022-11-17 21:57               ` Taylor Blau
2022-11-21  3:27                 ` Teng Long
2022-11-21 12:16     ` [PATCH v4 0/4] " Teng Long
2022-11-21 12:16       ` [PATCH v4 1/4] pack-bitmap.c: remove unnecessary "open_pack_index()" calls Teng Long
2022-11-21 12:16       ` [PATCH v4 2/4] pack-bitmap.c: avoid exposing absolute paths Teng Long
2022-11-21 12:16       ` [PATCH v4 3/4] pack-bitmap.c: break out of the bitmap loop early if not tracing Teng Long
2022-11-21 23:27         ` Junio C Hamano
2022-11-28 13:09           ` Teng Long
2022-11-21 12:16       ` [PATCH v4 4/4] pack-bitmap.c: trace bitmap ignore logs when midx-bitmap is found Teng Long
2022-11-21 19:09         ` Jeff King
2022-11-21 23:29           ` Junio C Hamano
2022-11-28 12:29             ` Teng Long
2022-11-28 12:37           ` Teng Long [this message]
2022-11-29  1:27             ` Jeff King
2022-11-29 13:14               ` Teng Long
2022-11-21 19:04       ` [PATCH v4 0/4] pack-bitmap.c: avoid exposing absolute paths Jeff King
2022-11-28 12:48         ` Teng Long
2022-11-28 14:09       ` [PATCH v5 " Teng Long
2022-11-28 14:09         ` [PATCH v5 1/4] pack-bitmap.c: remove unnecessary "open_pack_index()" calls Teng Long
2022-11-28 14:09         ` [PATCH v5 2/4] pack-bitmap.c: avoid exposing absolute paths Teng Long
2022-11-28 14:09         ` [PATCH v5 3/4] pack-bitmap.c: break out of the bitmap loop early if not tracing Teng Long
2022-11-28 23:26           ` Taylor Blau
2022-11-29 13:17             ` Teng Long
2022-11-28 14:09         ` [PATCH v5 4/4] pack-bitmap.c: trace bitmap ignore logs when midx-bitmap is found Teng Long
2022-11-28 23:30         ` [PATCH v5 0/4] pack-bitmap.c: avoid exposing absolute paths Taylor Blau
2022-11-29 13:21           ` Teng Long

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