Out-of-memory victim selection with BPF
Out-of-memory victim selection with BPF
Posted Aug 21, 2023 16:33 UTC (Mon) by ibukanov (subscriber, #3942)In reply to: Out-of-memory victim selection with BPF by Cyberax
Parent article: Out-of-memory victim selection with BPF
One does not even need to extends kernel API with syscalls that takes a process handle. Just have a single api to set the process handle on the current thread the following APIs will use.
Posted Aug 21, 2023 16:48 UTC (Mon)
by mathstuf (subscriber, #69389)
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Out-of-memory victim selection with BPF
Oh man, that sounds like quite a footgun. Error paths forgetting to restore it, what about other threads, etc. But I guess that's nothing new to those coding close to the kernel. Are there any other kinds of syscalls that can manipulate a scoped resource like that (I'm excepting intrinsic properties like pid, tid, etc. here…I suppose `cwd` is such a resource, but that feels more user-y than kernel-y to me)?