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[Bug 1883593] Re: Windows XP takes much longer to boot in TCG mode since
From: |
Randy Rhoads |
Subject: |
[Bug 1883593] Re: Windows XP takes much longer to boot in TCG mode since 5.0 |
Date: |
Thu, 18 Jun 2020 00:00:18 -0000 |
Bisecting showed that this is the bad commit:
b55f54bc965607c45b5010a107a792ba333ba654 exec: flush CPU TB cache in
breakpoint_invalidate
And I can indeed confirm that this commit is much slower than the
previous one, e18e5501d8ac692d32657a3e1ef545b14e72b730.
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https://bugs.launchpad.net/bugs/1883593
Title:
Windows XP takes much longer to boot in TCG mode since 5.0
Status in QEMU:
New
Bug description:
Since upgrading from 4.2 to 5.0, a Windows XP VM takes much longer to
boot.
It hangs about three minutes on "welcome" screen with the blue
background, while previously the total boot time was less than a
minute.
The issue only happens in TCG mode (not with KVM) and also happens
with the current master which includes the uring patches (7d3660e7).
I can reproduce this issue with a clean XP install with no flags other
than `-m 2G`. After booting, the performance seems to be normal.
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