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Héctor Orón Martínez authored
The following error ``` [ 67s] Unpacking gcc-7 (7.3.0-16ubuntu3) ... [ 67s] dpkg-deb: unrecoverable fatal error, aborting: [ 67s] fork failed: Resource temporarily unavailable [ 67s] dpkg: error processing archive /var/cache/apt/archives/gcc-7_7.3.0-16ubuntu3_i386.deb (--unpack): [ 67s] dpkg-deb --fsys-tarfile subprocess returned error exit status 2 [ 67s] dpkg: unrecoverable fatal error, aborting: [ 67s] fork failed: Resource temporarily unavailable [ 67s] /usr/sbin/debootstrap: 996: /usr/sbin/debootstrap: Cannot fork [...] ``` happens since all builds happen in the same cgroup which is limited to 4915, while builds have NPROC rlimits (just over 64000). If it reaches a total of 4915 tasks (processes and threads) calls like `fork()`, `clone()`, `pthread_create()` will fail. This is a short term fix proposed by Simon McVittie, while the long term solution should place each `bs_worker` instance in its own systemd-managed cgroup. The default task limit of 4915 might then be adequated. Signed-off-by: Héctor Orón Martínez <hector.oron@collabora.com>
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