From: Derrick Stolee <stolee@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Taylor Blau <me@ttaylorr.com>, Junio C Hamano <gitster@pobox.com>,
git@vger.kernel.org
Subject: Re: [RFC PATCH 1/1] commit-graph.c: die on un-parseable commits
Date: Fri, 6 Sep 2019 13:19:21 -0400 [thread overview]
Message-ID: <b1121a33-691a-e3ff-a212-48c0d7deae1b@gmail.com> (raw)
In-Reply-To: <20190906170417.GA23181@sigill.intra.peff.net>
On 9/6/2019 1:04 PM, Jeff King wrote:
> On Fri, Sep 06, 2019 at 12:48:05PM -0400, Derrick Stolee wrote:
>
>>> diff --git a/revision.h b/revision.h
>>> index 4134dc6029..5c0b831b37 100644
>>> --- a/revision.h
>>> +++ b/revision.h
>>> @@ -33,7 +33,7 @@
>>> #define ALL_REV_FLAGS (((1u<<11)-1) | NOT_USER_GIVEN | TRACK_LINEAR)
>>>
>>> #define TOPO_WALK_EXPLORED (1u<<27)
>>> -#define TOPO_WALK_INDEGREE (1u<<28)
>>> +#define TOPO_WALK_INDEGREE (1u<<24)
>>
>> As an aside, these flag bit modifications look fine, but would need to
>> be explained. I'm guessing that since you are adding a bit of data
>> to struct object you want to avoid increasing the struct size across
>> a 32-bit boundary. Are we sure that bit 24 is not used anywhere else?
>> (My search for "1u<<24" found nothing, and "1 << 24" found a bit in
>> the cache-entry flags, so this seems safe.)
>
> Yeah, I'd definitely break this up into several commits with explanation
> (though see an alternate I posted that just uses the parsed flag without
> any new bits).
>
> Bit 24 isn't used according to the table in objects.h, which is
> _supposed_ to be the source of truth, though of course there's no
> compiler-level checking. (One aside: is there a reason TOPO_WALK_* isn't
> part of ALL_REV_FLAGS?).
This was an oversight on my part. Sorry.
-Stolee
next prev parent reply other threads:[~2019-09-06 17:19 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-04 2:22 [RFC PATCH 0/1] commit-graph.c: handle corrupt commit trees Taylor Blau
2019-09-04 2:22 ` [RFC PATCH 1/1] commit-graph.c: die on un-parseable commits Taylor Blau
2019-09-04 3:04 ` Jeff King
2019-09-04 21:18 ` Taylor Blau
2019-09-05 6:47 ` Jeff King
2019-09-06 16:48 ` Derrick Stolee
2019-09-06 17:04 ` Jeff King
2019-09-06 17:19 ` Derrick Stolee [this message]
2019-09-06 17:20 ` Derrick Stolee
2019-09-05 22:19 ` Junio C Hamano
2019-09-06 6:35 ` Jeff King
2019-09-06 6:56 ` Jeff King
2019-09-06 16:59 ` Junio C Hamano
2019-09-06 17:04 ` Jeff King
2019-09-09 16:39 ` Junio C Hamano
2019-09-09 16:54 ` Jeff King
2019-09-04 18:25 ` [RFC PATCH 0/1] commit-graph.c: handle corrupt commit trees Garima Singh
2019-09-04 21:21 ` Taylor Blau
2019-09-05 6:08 ` Jeff King
2019-09-06 16:48 ` Derrick Stolee
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