Messages in this thread | | | Subject | Re: Occasional hung with UM after enable VMAP_STACK | From | Johannes Berg <> | Date | Tue, 04 Jan 2022 20:49:05 +0100 |
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On Tue, 2022-01-04 at 16:26 -0300, Walter Lozano wrote: > > Thank you for your quick response. The Debian configuration on package > user-mode-linux have these settings > > CONFIG_HAVE_ARCH_VMAP_STACK=y > CONFIG_VMAP_STACK=y
OK, so it actually _is_ enabled.
> as you can see in [1]. I did run some tests disabling those settings, > which passed without any hung. > > Unfortunately the "occasional" behavior makes this issue a bit tricky to > debug. >
Right.
Hm. I've been running our tests with it for about three months and haven't observed any hangs, but I guess that doesn't mean much.
To be honest, I have no particular reason to even want it, other than that it catches accidental DMA from stack more easily ... so I guess if we can't find anything, we might as well revert it.
Feels like it _should_ work though, since it's just a different location for the stack.
johannes
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