git@vger.kernel.org list mirror (unofficial, one of many)
 help / color / Atom feed
From: Junio C Hamano <gitster@pobox.com>
To: Stefan Beller <sbeller@google.com>
Cc: git@vger.kernel.org, Sjon Hortensius <sjon@parse.nl>
Subject: Re: 2.20.0 - Undocumented change in submodule update wrt # parallel jobs
Date: Thu, 13 Dec 2018 23:17:20 +0900
Message-ID: <xmqqva3xecjz.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <CAHef355RQt9gN-7QjuAAT8mZsNFKfCo4hOYi2+bkp-0Av7W=Qw@mail.gmail.com>

Sjon Hortensius <sjon@parse.nl> writes:

> When switching to 2.20 our `git submodule update' (which clones
> through ssh) broke because our ssh-server rejected the ~20
> simultaneous connections the git-client makes. This seems to be caused
> by a (possibly unintended) change in
> https://github.com/git/git/commit/90efe595c53f4bb1851371344c35eff71f604d2b
> which removed the default of max_jobs=1
>
> While this can easily be fixed by configuring submodule.fetchJobs I
> think this change should be documented - or reverted back to it's
> previous default of 1

The commit in question does not look like it _wanted_ to change the
default; rather, it appears to me that it wanted to be bug-to-bug
compatible with the original, and any such change of behaviour is
entirely unintended.

I think the attached may be sufficient to change the default
max_jobs back to 1.

By the way, is there a place where we document that the default
value for fetchjobs, when unconfigured, is 1?  If we are not making
such a concrete promise, then I would think it is OK to update the
default without any fanfare, as long as we have good reasons to do
so.  For this particular one, however, as I already said, I do not
think we wanted to change the default to unlimited or anything like
that, so...

 builtin/submodule--helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 789d00d87d..e8cdf84f1c 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -1552,7 +1552,7 @@ struct submodule_update_clone {
 #define SUBMODULE_UPDATE_CLONE_INIT {0, MODULE_LIST_INIT, 0, \
 	SUBMODULE_UPDATE_STRATEGY_INIT, 0, 0, -1, STRING_LIST_INIT_DUP, 0, \
 	NULL, NULL, NULL, \
-	NULL, 0, 0, 0, NULL, 0, 0, 0}
+	NULL, 0, 0, 0, NULL, 0, 0, 1}
 
 
 static void next_submodule_warn_missing(struct submodule_update_clone *suc,

  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-13  9:15 Sjon Hortensius
2018-12-13 14:02 ` Ævar Arnfjörð Bjarmason
2018-12-13 14:17 ` Junio C Hamano [this message]
2018-12-13 18:50   ` Stefan Beller
2018-12-13 19:02     ` [PATCH] submodule update: run at most one fetch job unless otherwise set Stefan Beller
2018-12-13 19:04       ` Eric Sunshine
2018-12-14  2:53       ` Junio C Hamano

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: http://vger.kernel.org/majordomo-info.html

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=xmqqva3xecjz.fsf@gitster-ct.c.googlers.com \
    --to=gitster@pobox.com \
    --cc=git@vger.kernel.org \
    --cc=sbeller@google.com \
    --cc=sjon@parse.nl \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

git@vger.kernel.org list mirror (unofficial, one of many)

Archives are clonable:
	git clone --mirror https://public-inbox.org/git
	git clone --mirror http://ou63pmih66umazou.onion/git
	git clone --mirror http://czquwvybam4bgbro.onion/git
	git clone --mirror http://hjrcffqmbrq6wope.onion/git

Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.version-control.git
	nntp://ou63pmih66umazou.onion/inbox.comp.version-control.git
	nntp://czquwvybam4bgbro.onion/inbox.comp.version-control.git
	nntp://hjrcffqmbrq6wope.onion/inbox.comp.version-control.git
	nntp://news.gmane.org/gmane.comp.version-control.git

 note: .onion URLs require Tor: https://www.torproject.org/

AGPL code for this site: git clone https://public-inbox.org/ public-inbox