boot-qemu.py: Allow memory value to be customized #114
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The default memory value for most machines is 512 MB, which is generally sufficient for most use cases, as these machines are usually quick to start up and shutdown. Unfortunately, there are times where the machine may run out of memory when percpu memory allocations are involved along with a large number of cores, which can happen when booting under KVM due to the script's heuristics for selecting a good default for '-smp', which depends on the number of cores on the host machine. Rather than try to adjust the existing heuristics further, allow users to specify a memory value that may be better suited for their machine, just like '-smp'. Signed-off-by: Nathan Chancellor <nathan@kernel.org>
nathanchance
requested review from
msfjarvis,
nickdesaulniers and
tpimh
as code owners
msfjarvis
approved these changes
Sep 14, 2023
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The default memory value for most machines is 512 MB, which is generally sufficient for most use cases, as these machines are usually quick to start up and shutdown. Unfortunately, there are times where the machine may run out of memory when percpu memory allocations are involved along with a large number of cores, which can happen when booting under KVM due to the script's heuristics for selecting a good default for
-smp, which depends on the number of cores on the host machine.Rather than try to adjust the existing heuristics further, allow users to specify a memory value that may be better suited for their machine, just like
-smp.