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xen-devel
[Xen-devel] [xen-unstable bisection] complete build-amd64
branch xen-unstable
xen branch xen-unstable
job build-amd64
test xen-build
Tree: http://hg.uk.xensource.com/xen-unstable.hg
*** Found and reproduced problem changeset ***
Bug is in tree: http://hg.uk.xensource.com/xen-unstable.hg
Bug introduced: 62bf12040b0f
Bug not present: 8420b82c22c2
changeset: 22452:62bf12040b0f
user: Keir Fraser <keir@xxxxxxx>
date: Wed Dec 01 20:10:27 2010 +0000
x86: fix IRQ migration when using directed EOI (broken with c/s 20465)
In directed-EOI mode, there is no chance to do the migration in
mask_and_ack_level_ioapic_irq(), as the remote IRR bit can't possibly
be clear after issuing the EOI to the LAPIC. Consequently, there's no
point to even try. Instead, migration must be done in
end_level_ioapic_irq(), and it requires masking the interrupt source
prior to issuing the EOI to the IO-APIC.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
For bisection revision-tuple graph see:
http://www.chiark.greenend.org.uk/~xensrcts/results/bisect.xen-unstable.build-amd64.xen-build.html
Revision IDs in each graph node refer, respectively, to the Trees above.
----------------------------------------
Found failure, as expected, in flight 2940
Host specification list: host=earwig
Searching for basis pass: 2856.
(tree in basispass but not in latest:
git://mariner.uk.xensource.com/qemu-xen-unstable.git)
Tree: http://hg.uk.xensource.com/xen-unstable.hg
Latest c443d0215854
Basis pass aba70e59a90d
Generating revisions with ./adhoc-revtuple-generator
http://hg.uk.xensource.com/xen-unstable.hg#aba70e59a90d-c443d0215854
pulling from http://hg.uk.xensource.com/xen-unstable.hg
searching for changes
no changes found
pulling from http://hg.uk.xensource.com/xen-unstable.hg
searching for changes
no changes found
Loaded 997 nodes in revision graph
Searching for test results:
2930 fail c443d0215854
2852 pass aba70e59a90d
2853 pass aba70e59a90d
2885 pass 8420b82c22c2
2869 pass d281061e6ec0
2957 pass irrelevant
2932 fail c443d0215854
2934 fail ddb6c9c6ebb9
2895 pass 8420b82c22c2
2936 fail 62bf12040b0f
2937 fail 62bf12040b0f
2854 pass aba70e59a90d
2940 fail c443d0215854
2855 pass aba70e59a90d
2943 fail c443d0215854
2849 pass aba70e59a90d
2888 pass 8420b82c22c2
2926 fail c443d0215854
2879 pass d281061e6ec0
2880 pass 3afb5ecbf69f
2962 pass irrelevant
2856 pass aba70e59a90d
2861 pass 3afb5ecbf69f
Searching for interesting versions
0 revisions at 8420b82c22c2
No revisions left to test, checking graph state.
*** Found and reproduced problem changeset ***
Bug is in tree: http://hg.uk.xensource.com/xen-unstable.hg
Bug introduced: 62bf12040b0f
Bug not present: 8420b82c22c2
changeset: 22452:62bf12040b0f
user: Keir Fraser <keir@xxxxxxx>
date: Wed Dec 01 20:10:27 2010 +0000
x86: fix IRQ migration when using directed EOI (broken with c/s 20465)
In directed-EOI mode, there is no chance to do the migration in
mask_and_ack_level_ioapic_irq(), as the remote IRR bit can't possibly
be clear after issuing the EOI to the LAPIC. Consequently, there's no
point to even try. Instead, migration must be done in
end_level_ioapic_irq(), and it requires masking the interrupt source
prior to issuing the EOI to the IO-APIC.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Revision graph left in
/home/xc_osstest/results/bisect.xen-unstable.build-amd64.xen-build.{dot,ps,png,html}.
No revision to test.
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