Messages in this thread | | | Date | Tue, 4 Jan 2022 16:26:57 -0300 | Subject | Re: Occasional hung with UM after enable VMAP_STACK | From | Walter Lozano <> |
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Hi Johannes,
On 1/4/22 16:04, Johannes Berg wrote: > On Tue, 2022-01-04 at 15:10 -0300, Walter Lozano wrote: >> Hi all, >> >> I noticed that after "um: enable VMAP_STACK" [1] I experienced some >> occasional hung in my Gitlab CI jobs that use user-mode-linux to build >> distro images. >> > Did you actually *enable* VMAP_STACK in the config as well? The commit > just makes it *possible* to enable it, you still have to set it > yourself. So you should be able to easily check with/without that > setting.
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
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.
Regards,
Walter
[1] https://salsa.debian.org/uml-team/user-mode-linux/-/blob/master/config.amd64#L321
-- Walter Lozano Collabora Ltd.
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