[xen-4.6-testing bisection] complete test-xtf-amd64-amd64-5

[osstest service owner <osstest-admin@xxxxxxxxxxxxxx>]

branch xen-4.6-testing
xenbranch xen-4.6-testing
job test-xtf-amd64-amd64-5
testid xtf-run

Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
Tree: qemuu git://xenbits.xen.org/qemu-xen.git
Tree: xen git://xenbits.xen.org/xen.git
Tree: xtf git://xenbits.xen.org/xtf.git

*** Found and reproduced problem changeset ***

  Bug is in tree:  xen git://xenbits.xen.org/xen.git
  Bug introduced:  7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
  Bug not present: 7017321d9b7b23adb50cad66d55ae526ab5d9fe1
  Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/107130/


  commit 7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
  Author: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
  Date:   Fri Mar 31 09:03:32 2017 +0200
  
      xen: sched: don't call hooks of the wrong scheduler via VCPU2OP
      
      Within context_saved(), we call the context_saved hook,
      and we use VCPU2OP() to determine from what scheduler.
      VCPU2OP uses DOM2OP, which uses d->cpupool, which is
      NULL when d is the idle domain. And in that case,
      DOM2OP just returns ops, the scheduler of cpupool0.
      
      Therefore, if:
      - cpupool0's scheduler defines context_saved (like
        Credit2 and RTDS do),
      - we are not in cpupool0 (i.e., our scheduler is
        not ops),
      - we are context switching from idle,
      
      we call VCPU2OP(idle_vcpu), which means
      DOM2OP(idle->cpupool), which is ops.
      
      Therefore, we both:
      - check if context_saved is defined in the wrong
        scheduler;
      - if yes, call the wrong one.
      
      When using Credit2 at boot, and also Credit2 in
      the other cpupool, this is wrong but innocuous,
      because it only involves the idle vcpus.
      
      When using Credit2 at boot, and Credit1 in the
      other cpupool, this is *totally* wrong, and
      it's by chance it does not explode!
      
      When using Credit2 and other schedulers I'm
      developping, I hit the following assert (in
      sched_credit2.c, on a CPU inside a cpupool that
      does not use Credit2):
      
      csched2_context_saved()
      {
       ...
       ASSERT(!vcpu_on_runq(svc));
       ...
      }
      
      Fix this by dealing explicitly, in VCPU2OP, with
      idle vcpus, returning the scheduler of the pCPU
      they (always) run on.
      
      Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
      Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
      Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxxx>
      master commit: a3653e6a279213ba4e883b2252415dc98633106a
      master date: 2017-03-27 14:28:05 +0100


For bisection revision-tuple graph see:
   
http://logs.test-lab.xenproject.org/osstest/results/bisect/xen-4.6-testing/test-xtf-amd64-amd64-5.xtf-run.html
Revision IDs in each graph node refer, respectively, to the Trees above.

----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.6-testing/test-xtf-amd64-amd64-5.xtf-run
 --summary-out=tmp/107130.bisection-summary --basis-template=106819 
--blessings=real,real-bisect xen-4.6-testing test-xtf-amd64-amd64-5 xtf-run
Searching for failure / basis pass:
 107119 fail [host=baroque1] / 106819 [host=baroque0] 106663 [host=rimava0] 
106529 ok.
Failure / basis pass flights: 107119 / 106529
(tree with no url: minios)
(tree with no url: ovmf)
(tree with no url: seabios)
Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
Tree: qemuu git://xenbits.xen.org/qemu-xen.git
Tree: xen git://xenbits.xen.org/xen.git
Tree: xtf git://xenbits.xen.org/xtf.git
Latest b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
Basis pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
722ce03b32f37ef5af09105727b574339326d354 
abb5a1291555d0e33a19e2a252f00852a9026f98 
83af19a3154af85815e4c8ffd170839b99685adc
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/linux-pvops.git#b65f2f457c49b2cfd7967c34b7a0b04c25587f13-b65f2f457c49b2cfd7967c34b7a0b04c25587f13
 
git://xenbits.xen.org/osstest/linux-firmware.git#c530a75c1e6a472b0eb9558310b518f0dfcd8860-c530a75c1e6a472b0eb9558310b518f0dfcd8860
 
git://xenbits.xen.org/qemu-xen-traditional.git#b7e9d3976ba48f277da6004311f5025b07a884ea-57ca3f4a3092695dd553d3ff4540f5559b1c8fc7
 
git://xenbits.xen.org/qemu-xen.git#722ce03b32f37ef5af09105727b574339326d354-44f3d4e6448e37588248db784193b7a047add65a
 
git://xenbits.xen.org/xen.git#abb5a1291555d0e33a19e2a252f00852a9026f98-7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
 
git://xenbits.xen.org/xtf.git#83af19a3154af85815e4c8ffd170839b99685adc-2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
Use of uninitialized value $parents in array dereference at 
./adhoc-revtuple-generator line 465.
Use of uninitialized value in concatenation (.) or string at 
./adhoc-revtuple-generator line 465.
Loaded 1304 nodes in revision graph
Searching for test results:
 106529 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
722ce03b32f37ef5af09105727b574339326d354 
abb5a1291555d0e33a19e2a252f00852a9026f98 
83af19a3154af85815e4c8ffd170839b99685adc
 106663 [host=rimava0]
 106819 [host=baroque0]
 107020 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107042 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107076 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107097 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107116 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
722ce03b32f37ef5af09105727b574339326d354 
abb5a1291555d0e33a19e2a252f00852a9026f98 
83af19a3154af85815e4c8ffd170839b99685adc
 107117 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107118 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
44f3d4e6448e37588248db784193b7a047add65a 
18949dc6e1a520b6430f128a6981318552ca7823 
83af19a3154af85815e4c8ffd170839b99685adc
 107120 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
9eb0aa2f47a78ffbab9e7ab9974440a132ce073f 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107121 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
541ad61a921965c692ea31a06d9d14a1bb1e7346 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107124 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107125 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107126 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107119 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107128 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107129 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107130 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
Searching for interesting versions
 Result found: flight 106529 (pass), for basis pass
 Result found: flight 107020 (fail), for basis failure
 Repro found: flight 107116 (pass), for basis pass
 Repro found: flight 107117 (fail), for basis failure
 0 revisions at b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
No revisions left to test, checking graph state.
 Result found: flight 107124 (pass), for last pass
 Result found: flight 107125 (fail), for first failure
 Repro found: flight 107126 (pass), for last pass
 Repro found: flight 107128 (fail), for first failure
 Repro found: flight 107129 (pass), for last pass
 Repro found: flight 107130 (fail), for first failure

*** Found and reproduced problem changeset ***

  Bug is in tree:  xen git://xenbits.xen.org/xen.git
  Bug introduced:  7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
  Bug not present: 7017321d9b7b23adb50cad66d55ae526ab5d9fe1
  Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/107130/


  commit 7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
  Author: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
  Date:   Fri Mar 31 09:03:32 2017 +0200
  
      xen: sched: don't call hooks of the wrong scheduler via VCPU2OP
      
      Within context_saved(), we call the context_saved hook,
      and we use VCPU2OP() to determine from what scheduler.
      VCPU2OP uses DOM2OP, which uses d->cpupool, which is
      NULL when d is the idle domain. And in that case,
      DOM2OP just returns ops, the scheduler of cpupool0.
      
      Therefore, if:
      - cpupool0's scheduler defines context_saved (like
        Credit2 and RTDS do),
      - we are not in cpupool0 (i.e., our scheduler is
        not ops),
      - we are context switching from idle,
      
      we call VCPU2OP(idle_vcpu), which means
      DOM2OP(idle->cpupool), which is ops.
      
      Therefore, we both:
      - check if context_saved is defined in the wrong
        scheduler;
      - if yes, call the wrong one.
      
      When using Credit2 at boot, and also Credit2 in
      the other cpupool, this is wrong but innocuous,
      because it only involves the idle vcpus.
      
      When using Credit2 at boot, and Credit1 in the
      other cpupool, this is *totally* wrong, and
      it's by chance it does not explode!
      
      When using Credit2 and other schedulers I'm
      developping, I hit the following assert (in
      sched_credit2.c, on a CPU inside a cpupool that
      does not use Credit2):
      
      csched2_context_saved()
      {
       ...
       ASSERT(!vcpu_on_runq(svc));
       ...
      }
      
      Fix this by dealing explicitly, in VCPU2OP, with
      idle vcpus, returning the scheduler of the pCPU
      they (always) run on.
      
      Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
      Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
      Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxxx>
      master commit: a3653e6a279213ba4e883b2252415dc98633106a
      master date: 2017-03-27 14:28:05 +0100

Revision graph left in 
/home/logs/results/bisect/xen-4.6-testing/test-xtf-amd64-amd64-5.xtf-run.{dot,ps,png,html,svg}.
----------------------------------------
107130: tolerable ALL FAIL

flight 107130 xen-4.6-testing real-bisect [real]
http://logs.test-lab.xenproject.org/osstest/logs/107130/

Failures :-/ but no regressions.

Tests which did not succeed,
including tests which could not be run:
 test-xtf-amd64-amd64-5       11 xtf-run                 fail baseline untested


jobs:
 test-xtf-amd64-amd64-5                                       fail    


------------------------------------------------------------
sg-report-flight on osstest.test-lab.xenproject.org
logs: /home/logs/logs
images: /home/logs/images

Logs, config files, etc. are available at
    http://logs.test-lab.xenproject.org/osstest/logs

Explanation of these reports, and of osstest in general, is at
    http://xenbits.xen.org/gitweb/?p=osstest.git;a=blob;f=README.email;hb=master
    http://xenbits.xen.org/gitweb/?p=osstest.git;a=blob;f=README;hb=master

Test harness code can be found at
    http://xenbits.xen.org/gitweb?p=osstest.git;a=summary


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