public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug other/109898] New: 'make install -j' sometimes corrupts 'dir' file for .info files due to parallel 'install-info' calls Date: Wed, 17 May 2023 20:40:14 +0000 [thread overview] Message-ID: <bug-109898-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109898 Bug ID: 109898 Summary: 'make install -j' sometimes corrupts 'dir' file for .info files due to parallel 'install-info' calls Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other Assignee: unassigned at gcc dot gnu.org Reporter: slyfox at gcc dot gnu.org Target Milestone: --- In https://github.com/NixOS/nixpkgs/issues/229470 Arnout Engelen noticed that 'make install -j' sometimes installs incomplete '$prefix/share/info/dir' file. This happens because 'make install-info' when running in parallel is executing equivalent of: if /<<NIX>>/bash-5.2-p15/bin/bash -c 'install-info --version' >/dev/null 2>&1; then \ install-info --dir-file=/<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/dir /<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/gcc.info; \ if /<<NIX>>/bash-5.2-p15/bin/bash -c 'install-info --version' >/dev/null 2>&1; then \ install-info --dir-file=/<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/dir /<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/gccinstall.info; \ if /<<NIX>>/bash-5.2-p15/bin/bash -c 'install-info --version' >/dev/null 2>&1; then \ install-info --dir-file=/<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/dir /<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/cppinternals.info; \ if /<<NIX>>/bash-5.2-p15/bin/bash -c 'install-info --version' >/dev/null 2>&1; then \ install-info --dir-file=/<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/dir /<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/cpp.info; \ if /<<NIX>>/bash-5.2-p15/bin/bash -c 'install-info --version' >/dev/null 2>&1; then \ install-info --dir-file=/<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/dir /<<NIX>>/x86_64-unknown-linux-musl-stage-static-gcc-14.0.0/share/info/gccint.info; \ On it's own 'install-info' does not lock $prefix/share/info/dir file atomically. As a result multiple parallel executions of 'install-info' compete and occasionally throw away work of one another. Right now `nixpkgs` works it around as https://github.com/NixOS/nixpkgs/pull/229898: --- gcc-12.2.0/gcc/Makefile.in 2022-08-19 10:09:52.280658631 +0200 +++ gcc-12.2.0-new/gcc/Makefile.in 2023-05-04 14:35:44.401420184 +0200 @@ -3781,6 +3781,11 @@ fi; \ fi +# We don't care about the order in which the info files are built, but +# install-info doesn't support multiple parallel invocations writing to +# the same `dir-file`, so we have to disable parallelism for that reason: +.NOTPARALLEL: install-info + # Install the info files. # $(INSTALL_DATA) might be a relative pathname, so we can't cd into srcdir # to do the install. It might not be enough to handle language-specific 'install-info' targets. What would be the best way to handle this race condition?
next reply other threads:[~2023-05-17 20:40 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-05-17 20:40 slyfox at gcc dot gnu.org [this message] 2023-05-18 6:23 ` [Bug other/109898] " rguenth at gcc dot gnu.org 2023-05-18 8:36 ` redi at gcc dot gnu.org 2023-05-18 19:35 ` slyfox at gcc dot gnu.org 2023-05-19 9:29 ` redi at gcc dot gnu.org 2023-05-19 9:52 ` jakub at gcc dot gnu.org
Reply instructions: You may reply publicly 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 * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-109898-4@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).