OK, I commented out the memtune section of the guest
<!--<memtune>
<hard_limit unit='GiB'>128</hard_limit>
</memtune>-->
without a hard_limit set and started it, checking with the following
stap script:
root@buneary:/home/ubuntu# stap -e 'probe kernel.function("sys_setrlimit") {
printf("locked: %d -> %s\n", pid(), sprintf("%s, %s",
_rlimit_resource_str($resource), _struct_rlimit_u($rlim))) }' -kv -g
--suppress-time-limits
Pass 1: parsed user script and 465 library scripts using
112804virt/48432res/6652shr/42144data kb, in 160usr/20sys/176real ms.
Pass 2: analyzed script: 1 probe, 5 functions, 100 embeds, 0 globals using
164780virt/101832res/7968shr/94120data kb, in 740usr/140sys/2122real ms.
Pass 3: translated to C into "/tmp/stapXqZhh3/stap_54310_src.c" using
164780virt/102024res/8160shr/94120data kb, in 10usr/0sys/13real ms.
Pass 4: compiled C into "stap_54310.ko" in 2040usr/540sys/4985real ms.
Pass 5: starting run.
It looks like the process limit has been applied correctly and the guest
starts:
locked: 54734 -> RLIMIT_MEMLOCK, [9007199254740991,9007199254740991]
Marking the xenial verification as done.
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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https://bugs.launchpad.net/bugs/1708305
Title:
Realtime feature mlockall: Cannot allocate memory
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