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Date:      Sat, 11 Sep 2021 13:36:06 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 258432] Resume hangs unless copy_staging enable
Message-ID:  <bug-258432-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D258432

            Bug ID: 258432
           Summary: Resume hangs unless copy_staging enable
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: taku@tackymt.homeip.net

current as of bb61ccd530b76ab8a3945b1eccf7fa3c38647312 hangs during resume =
on
amd64.

If I issue the loader command `copy_staging enable` either manually or in
/boot/loader.rc.local, the resume works again.

da2f833f7a0bef3cde7d5fc2a05e4646e873567f : OK
bb61ccd530b76ab8a3945b1eccf7fa3c38647312 : hangs
bb61ccd530b76ab8a3945b1eccf7fa3c38647312 + copy_staging : OK

I suspect f75caed644a5c8c342a1ea5e7a6d5251f82ed0b1 (amd64 UEFI loader: stop
copying staging area to 2M physical) breaks some assumptions that
sys/amd64/acpica/acpi_wakecode.S implicitly relies.

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