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2020-05-21config: let feature.experimental imply protocol.version=2Libravatar Jonathan Nieder1-1/+2
Git 2.26 used protocol v2 as its default protocol, but soon after release, users noticed that the protocol v2 negotiation code was prone to fail when fetching from some remotes that are far ahead of others (such as linux-next.git versus Linus's linux.git). That has been fixed by 0b07eecf6ed (Merge branch 'jt/v2-fetch-nego-fix', 2020-05-01), but to be cautious, we are using protocol v0 as the default in 2.27 to buy some time for any other unanticipated issues to surface. To that end, let's ensure that users requesting the bleeding edge using the feature.experimental flag *do* get protocol v2. This way, we can gain experience with a wider audience for the new protocol version and be more confident when it is time to enable it by default for all users in some future Git version. Implementation note: this isn't with the rest of the feature.experimental options in repo-settings.c because those are tied to a repository object, whereas this code path is used for operations like "git ls-remote" that do not require a repository. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-22Revert "fetch: default to protocol version 2"Libravatar Jonathan Nieder1-1/+1
This reverts commit 684ceae32dae726c6a5c693b257b156926aba8b7. Users fetching from linux-next and other kernel remotes are reporting that the limited ref advertisement causes negotiation to reach MAX_IN_VAIN, resulting in too-large fetches. Reported-by: Lubomir Rintel <lkundrak@v3.sk> Reported-by: "Dixit, Ashutosh" <ashutosh.dixit@intel.com> Reported-by: Jiri Slaby <jslaby@suse.cz> Reported-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-15fetch: default to protocol version 2Libravatar Jonathan Nieder1-1/+1
The Git users at $DAYJOB have been using protocol v2 as a default for ~1.5 years now and others have been also reporting good experiences with it, so it seems like a good time to bump the default version. It produces a significant performance improvement when fetching from repositories with many refs, such as https://chromium.googlesource.com/chromium/src. This only affects the client, not the server. (The server already defaults to supporting protocol v2.) The protocol change is backward compatible, so this should produce no significant effect when contacting servers that only speak protocol v0. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-15config doc: protocol.version is not experimentalLibravatar Jonathan Nieder1-5/+4
Git's protocol version 2 has been working well in production for over a year. Simplify documentation by no longer referring to it as experimental. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-29config.txt: move protocol.* to a separate fileLibravatar Nguyễn Thái Ngọc Duy1-0/+64
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>