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[Xen-devel] [xen-4.6-testing bisection] complete test-xtf-amd64-amd64-1



branch xen-4.6-testing
xenbranch xen-4.6-testing
job test-xtf-amd64-amd64-1
testid xtf-fep

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/107147/


  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-amd64-1.xtf-fep.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-amd64-1.xtf-fep
 --summary-out=tmp/107147.bisection-summary --basis-template=106819 
--blessings=real,real-bisect xen-4.6-testing test-xtf-amd64-amd64-1 xtf-fep
Searching for failure / basis pass:
 107134 fail [host=chardonnay1] / 106819 [host=rimava1] 106663 [host=godello0] 
106529 [host=baroque0] 105991 [host=huxelrebe1] 105936 ok.
Failure / basis pass flights: 107134 / 105936
(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 
a7fd3717d99944530b04130f050e83402e64afed 
15c0f1500fc078b6411d2c86842cb2f3fd7393c0 
35d6d7bbb428f8a33d39d851d7d60d40a3605a58 
2b8c78575cb534908ccc8824d76904376b9c38a5
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#a7fd3717d99944530b04130f050e83402e64afed-57ca3f4a3092695dd553d3ff4540f5559b1c8fc7
 
git://xenbits.xen.org/qemu-xen.git#15c0f1500fc078b6411d2c86842cb2f3fd7393c0-44f3d4e6448e37588248db784193b7a047add65a
 
git://xenbits.xen.org/xen.git#35d6d7bbb428f8a33d39d851d7d60d40a3605a58-7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546
 
git://xenbits.xen.org/xtf.git#2b8c78575cb534908ccc8824d76904376b9c38a5-2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
From git://cache:9419/git://xenbits.xen.org/xen
   7ff6d9f..f96efeb  staging-4.6 -> origin/staging-4.6
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 1308 nodes in revision graph
Searching for test results:
 105936 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
a7fd3717d99944530b04130f050e83402e64afed 
15c0f1500fc078b6411d2c86842cb2f3fd7393c0 
35d6d7bbb428f8a33d39d851d7d60d40a3605a58 
2b8c78575cb534908ccc8824d76904376b9c38a5
 105991 [host=huxelrebe1]
 106529 [host=baroque0]
 106663 [host=godello0]
 106819 [host=rimava1]
 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
 107141 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107144 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107145 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107134 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107146 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107147 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107119 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107131 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
a7fd3717d99944530b04130f050e83402e64afed 
15c0f1500fc078b6411d2c86842cb2f3fd7393c0 
35d6d7bbb428f8a33d39d851d7d60d40a3605a58 
2b8c78575cb534908ccc8824d76904376b9c38a5
 107132 fail b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7ff6d9fc19ef88d2ca3304a312c0e8a46b61f546 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107133 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
722ce03b32f37ef5af09105727b574339326d354 
e9fbb8eb834b21a6f0ed18f41e35baa74ada3205 
1d68cab2189bd035002ecc32cce154f979f9eff5
 107135 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
b7e9d3976ba48f277da6004311f5025b07a884ea 
722ce03b32f37ef5af09105727b574339326d354 
18949dc6e1a520b6430f128a6981318552ca7823 
83af19a3154af85815e4c8ffd170839b99685adc
 107136 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
ac4c5d4ddf89051365da2acba5c6c306a10e0bbe 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107137 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
4f9617120b09ad1554d8e4a0ca817e27bfbbe1a1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107139 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
541ad61a921965c692ea31a06d9d14a1bb1e7346 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
 107140 pass b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
Searching for interesting versions
 Result found: flight 105936 (pass), for basis pass
 Result found: flight 107020 (fail), for basis failure
 Repro found: flight 107131 (pass), for basis pass
 Repro found: flight 107132 (fail), for basis failure
 0 revisions at b65f2f457c49b2cfd7967c34b7a0b04c25587f13 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
57ca3f4a3092695dd553d3ff4540f5559b1c8fc7 
44f3d4e6448e37588248db784193b7a047add65a 
7017321d9b7b23adb50cad66d55ae526ab5d9fe1 
2b62f68c373159b0b4b0c24512ebfbc8fb02f58e
No revisions left to test, checking graph state.
 Result found: flight 107140 (pass), for last pass
 Result found: flight 107141 (fail), for first failure
 Repro found: flight 107144 (pass), for last pass
 Repro found: flight 107145 (fail), for first failure
 Repro found: flight 107146 (pass), for last pass
 Repro found: flight 107147 (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/107147/


  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-amd64-1.xtf-fep.{dot,ps,png,html,svg}.
----------------------------------------
107147: tolerable truncated

flight 107147 xen-4.6-testing real-bisect [real]
http://logs.test-lab.xenproject.org/osstest/logs/107147/

Failures :-/ but no regressions.

Tests which did not succeed,
including tests which could not be run:
 test-xtf-amd64-amd64-1       10 xtf-fep                 fail baseline untested


jobs:
 test-xtf-amd64-amd64-1                                       truncated


------------------------------------------------------------
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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