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view mercurial/templates/map-cmdline.xml @ 30921:1f151a33af8e
lock: include Linux pid namespace identifier in prefix
Previously, the lock only contains a hostname as an attempt to detect pid
namespace difference. However, that's not enough on modern Linux - a single
hostname could have different pid namespaces.
That means if people run hg inside different PID namespaces with a same UTS
namespae, the lock would be broken - an hg proccess in pid namespace A will
think the lock having a "random" pid in pid namespace B is "dead" and remove
it.
This patch solves the above issue by appending an PID namespace identifier of
the current process to the lock prefix ("hostname"). It depends on /proc
being mounted properly. But I don't think there is a better way to get pid
namespace identifier reliably.
author | Jun Wu <quark@fb.com> |
---|---|
date | Fri, 10 Feb 2017 13:56:31 -0800 |
parents | 3095b1027661 |
children | f4aeb952ab77 |
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