On Tue, 2022-01-04 at 16:26 -0300, Walter Lozano wrote:
Thank you for your quick response. The Debian configuration on packageOK, so it actually _is_ enabled.
user-mode-linux have these settings
CONFIG_HAVE_ARCH_VMAP_STACK=y
CONFIG_VMAP_STACK=y
as you can see in [1]. I did run some tests disabling those settings,Right.
which passed without any hung.
Unfortunately the "occasional" behavior makes this issue a bit tricky to
debug.
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.