From: Jonathan Nieder <jrnieder@gmail.com>
To: Jeff King <peff@peff.net>
Cc: Jonathan Tan <jonathantanmy@google.com>, git@vger.kernel.org
Subject: Re: [PATCH] gc: do not warn about too many loose objects
Date: Mon, 16 Jul 2018 12:09:49 -0700 [thread overview]
Message-ID: <20180716190949.GB11513@aiede.svl.corp.google.com> (raw)
In-Reply-To: <20180716185255.GC22298@sigill.intra.peff.net>
Hi,
Jeff King wrote:
> On Mon, Jul 16, 2018 at 11:22:07AM -0700, Jonathan Nieder wrote:
>> Jeff King wrote:
>>> So while I completely agree that it's not a great thing to encourage
>>> users to blindly run "git prune", I think it _is_ actionable.
>>
>> To flesh this out a little more: what user action do you suggest? Could
>> we carry out that action automatically?
>
> Er, the action is to run "git prune", like the warning says. :)
I don't think we want to recommend that, especially when "git gc --auto"
does the right thing automatically.
Can you convince me I'm wrong?
[...]
>> I mentally make a distinction between this warning from "git gc
>> --auto" and the warning from commands like "git gui".
[...]
> I don't think those warnings are the same. The warning from "git gui"
> is: you may benefit from running gc.
>
> The warning that is deleted by this patch is: you _just_ ran gc, and hey
> we even did it automatically for you, but we're still in a funky state
> afterwards. You might need to clean up this state.
This sounds awful. It sounds to me like you're saying "git gc --auto"
is saying "I just did the wrong thing, and here is how you can clean
up after me". That's not how I want a program to behave.
But there's a simpler explanation for what "git gc --auto" was trying
to say, which Jonathan described.
[...]
>> Yes, this is a real problem, and it would affect any other warning
>> (or even GIT_TRACE=1 output) produced by gc --auto as well. I think we
>> should consider it a serious bug, separate from the symptom Jonathan is
>> fixing.
>>
>> Unfortunately I don't have a great idea about how to fix it. Should
>> we avoid writing warnings to gc.log in daemon mode? That would
>> prevent the user from ever seeing the warnings, but because of the
>> nature of a warning, that might be reasonable.
>
> If you do that without anything further, then it will break the
> protection against repeatedly running auto-gc, as I described in the
> previous email.
Do you mean ratelimiting for the message, or do you actually mean
repeatedly running auto-gc itself?
If we suppress warnings, there would still be a gc.log while "git gc
--auto" is running, just as though there had been no warnings at all.
I believe this is close to the intended behavior; it's the same as
what you'd get without daemon mode, except that you lose the warning.
[...]
>> Should we put warnings
>> in a separate log file with different semantics? Should we change the
>> format of gc.log to allow more structured information (include 'gc'
>> exit code) and perform a two-stage migration to the new format (first
>> learn to read the new format, then switch to writing it)?
>
> Any of those would work similarly to the "just detect warnings" I
> suggested earlier, with respect to keeping the "1 day" expiration
> intact, so I'd be OK with them. In theory they'd be more robust than
> scraping the "warning:" prefix. But in practice, I think you have to
> resort to scraping anyway, if you are interested in treating warnings
> from sub-processes the same way.
Can you say more about this for me? I am not understanding what
you're saying necessitates scraping the output. I would strongly
prefer to avoid scraping the output.
Thanks,
Jonathan
next prev parent reply other threads:[~2018-07-16 19:09 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-16 17:27 [PATCH] gc: do not warn about too many loose objects Jonathan Tan
2018-07-16 17:51 ` Jeff King
2018-07-16 18:22 ` Jonathan Nieder
2018-07-16 18:52 ` Jeff King
2018-07-16 19:09 ` Jonathan Nieder [this message]
2018-07-16 19:41 ` Jeff King
2018-07-16 19:54 ` Jonathan Nieder
2018-07-16 20:29 ` Jeff King
2018-07-16 20:37 ` Jonathan Nieder
2018-07-16 21:09 ` Jeff King
2018-07-16 21:40 ` Jonathan Nieder
2018-07-16 21:45 ` Jeff King
2018-07-16 22:03 ` Jonathan Nieder
2018-07-16 22:43 ` Jeff King
2018-07-16 22:56 ` Jonathan Nieder
2018-07-16 23:26 ` Jeff King
2018-07-17 1:53 ` Jonathan Nieder
2018-07-17 8:59 ` Ævar Arnfjörð Bjarmason
2018-07-17 14:03 ` Jonathan Nieder
2018-07-17 15:24 ` Ævar Arnfjörð Bjarmason
2018-07-17 20:27 ` Jeff King
2018-07-18 13:11 ` Ævar Arnfjörð Bjarmason
2018-07-18 17:29 ` Jeff King
2018-07-17 15:59 ` Duy Nguyen
2018-07-17 18:09 ` Junio C Hamano
2018-07-16 19:15 ` Elijah Newren
2018-07-16 19:19 ` Jonathan Nieder
2018-07-16 20:21 ` Elijah Newren
2018-07-16 20:35 ` Jeff King
2018-07-16 20:56 ` Jonathan Nieder
2018-07-16 21:12 ` Jeff King
2018-07-16 19:52 ` Jeff King
2018-07-16 20:16 ` Elijah Newren
2018-07-16 20:38 ` Jeff King
2018-07-16 21:09 ` Elijah Newren
2018-07-16 21:21 ` Jeff King
2018-07-16 22:07 ` Elijah Newren
2018-07-16 22:55 ` Jeff King
2018-07-16 23:06 ` Elijah Newren
2018-07-16 21:31 ` Jonathan Nieder
2018-07-17 6:51 ` [PATCH v2 0/3] gc --auto: do not return error for prior errors in daemonized mode Jonathan Nieder
2018-07-17 6:53 ` [PATCH 1/3] gc: improve handling of errors reading gc.log Jonathan Nieder
2018-07-17 18:19 ` Junio C Hamano
2018-07-17 19:58 ` Jeff King
2018-07-17 6:54 ` [PATCH 2/3] gc: exit with status 128 on failure Jonathan Nieder
2018-07-17 18:22 ` Junio C Hamano
2018-07-17 19:59 ` Jeff King
2018-09-17 18:33 ` Jeff King
2018-09-17 18:40 ` Jonathan Nieder
2018-09-18 17:30 ` Jeff King
2018-07-17 6:57 ` [PATCH 3/3] gc: do not return error for prior errors in daemonized mode Jonathan Nieder
2018-07-17 20:13 ` Jeff King
2018-07-18 16:21 ` Junio C Hamano
2018-07-18 17:22 ` Jeff King
2018-07-18 18:19 ` Junio C Hamano
2018-07-18 19:06 ` Jeff King
2018-07-18 19:55 ` Junio C Hamano
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