tree a95f87a785dc47cd0c9298836728898b1179c30c
parent fac92fad125e5fd796d6ef0dd798bb7dc1200fb3
author Shintaro Kawamura <kawasin@google.com> 1672021122 +0900
committer crosvm LUCI <crosvm-scoped@luci-project-accounts.iam.gserviceaccount.com> 1673319534 +0000

swap: wake the faulting process on conflict

userfaultfd does not wake the thread if zero operation fails with
EEXIST.

minor change: An unexpected page fault event is critical error because
it blocks the faulting thread forever.

BUG=b:215093219
TEST=none

Change-Id: I5326878018f825024c7a5ceaf8daec5792547cb6
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/4125076
Commit-Queue: Shin Kawamura <kawasin@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: David Stevens <stevensd@chromium.org>