Messages in this thread | ![/](/images/icornerl.gif) | | From | David Laight <> | Subject | RE: THP backed thread stacks | Date | Sat, 18 Mar 2023 12:58:20 +0000 |
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From: Matthew Wilcox > Sent: 17 March 2023 17:53 ... > My understanding is that for a normal app (like, say, 'cat'), we'll > allow up to an 8MB stack, but we only create a VMA that is 4kB in size > and set the VM_GROWSDOWN flag on it (to allow it to magically grow). > Therefore we won't create a 2MB page because the VMA is too small.
Is there anyway that glibc (or anything else) could request that for a thread stack?
It would make the process 'memory size' reported by ps/top much more meaningful for programs with threads. I've noticed some (what should be) small programs having a size (rss?) of 277m. I'm sure a lot of it is thread stack.
David
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