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author | Eelco Dolstra <edolstra@gmail.com> | 2017-08-29T11·21+0200 |
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committer | Eelco Dolstra <edolstra@gmail.com> | 2017-08-29T11·21+0200 |
commit | 93a5ef0516881ec133fc5e54069add6dd64ffbdd (patch) | |
tree | 9712db5c125630ae11560a6a80561a28bbac7ffc /.gitignore | |
parent | 1c58e13bee6715c668e93cd4ec93bc5d5fd1a4ad (diff) |
nix run: Fix chroot execution
Running "nix run" with a diverted store, e.g. $ nix run --store local?root=/tmp/nix nixpkgs.hello stopped working when Nix became multithreaded, because unshare(CLONE_NEWUSER) doesn't work in multithreaded processes. The obvious solution is to terminate all other threads first, but 1) there is no way to terminate Boehm GC marker threads; and 2) it appears that the kernel has a race where unshare(CLONE_NEWUSER) will still fail for some indeterminate amount of time after joining other threads. So instead, "nix run" will now exec() a single-threaded helper ("nix __run_in_chroot") that performs the actual unshare()/chroot()/exec().
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions