Hello,
When I call virDomainManagedSave, libvirtd will fork a child process
libvirt_iohelper to write save file, and the system cache will
increase soon just like this:
Swap: 0M total, 0M used, 0M free, 1668M cached
Swap: 0M total, 0M used, 0M free, 1715M cached
But I have cgroup to control the memory of libvirtd below 50 M, so in this
case, libvirt_iohelper will be killed, and virDomainManagedSave failed.
So my question is:
1. Is it ok for libvirtd to occupy large amount of cache when save? Can we
flush cache in time?
2. In my situation, is it any good idea to help me out? Increase the memory
limit value? Pass through the cache? Flush cache? Or any one better? Which one
do you preffer?
Best Regards,
-WangYufei
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