Re:Broken by design: systemd
by makomk on Monday February 10, 2014 @09:10AM
(#7211124)
PID 1 is meant to be immune to the OOM killer. Last time I did development work in that area, it was also impossible to attach a debugger to PID 1 without patching the kernel, and although it worked I'm not sure how safe it was to do so.
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zx2c4@thinkpad ~ $ sudo strace -p 1
Process 1 attached
select(11, [10], NULL, NULL, {1, 122329}) = 0 (Timeout)
stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
fstat(10, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
select(11, [10], NULL, NULL, {5, 0}) = 0 (Timeout)
stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
fstat(10, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
stat("/dev/initctl", {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
select(11, [10], NULL, NULL, {5, 0}^CProcess 1 detached
<detached ...>