From: osstest service owner <osstest-admin@xenproject.org>
To: xen-devel@lists.xensource.com, osstest-admin@xenproject.org
Subject: [xen-4.6-testing test] 101705: trouble: preparing/queued
Date: Thu, 27 Oct 2016 10:52:20 +0000 [thread overview]
Message-ID: <osstest-101705-mainreport@xen.org> (raw)
flight 101705 xen-4.6-testing running [real]
http://logs.test-lab.xenproject.org/osstest/logs/101705/
Failures and problems with tests :-(
Tests which did not succeed and are blocking,
including tests which could not be run:
test-armhf-armhf-xl-rtds <none executed> queued
test-amd64-amd64-libvirt-qemuu-debianhvm-amd64-xsm <none executed> queued
test-amd64-amd64-xl-qemuu-ovmf-amd64 <none executed> queued
test-amd64-i386-pair <none executed> queued
test-armhf-armhf-xl-multivcpu <none executed> queued
test-armhf-armhf-libvirt-xsm <none executed> queued
test-amd64-i386-qemuu-rhel6hvm-intel <none executed> queued
test-amd64-i386-migrupgrade <none executed> queued
test-amd64-amd64-xl-rtds <none executed> queued
test-armhf-armhf-xl-xsm <none executed> queued
test-amd64-i386-qemut-rhel6hvm-intel <none executed> queued
test-amd64-i386-xl-qemuu-ovmf-amd64 <none executed> queued
test-amd64-amd64-xl-pvh-intel <none executed> queued
test-armhf-armhf-xl-arndale <none executed> queued
test-xtf-amd64-amd64-1 <none executed> queued
test-amd64-amd64-xl-qemuu-winxpsp3 <none executed> queued
test-amd64-amd64-amd64-pvgrub <none executed> queued
test-amd64-i386-qemut-rhel6hvm-amd <none executed> queued
test-xtf-amd64-amd64-3 <none executed> queued
test-armhf-armhf-libvirt <none executed> queued
test-amd64-amd64-xl-pvh-amd <none executed> queued
test-amd64-i386-freebsd10-amd64 <none executed> queued
test-amd64-amd64-xl-qemuu-debianhvm-amd64 <none executed> queued
test-amd64-i386-xl-qemut-winxpsp3 <none executed> queued
test-amd64-amd64-xl-credit2 <none executed> queued
test-armhf-armhf-xl-cubietruck <none executed> queued
test-amd64-amd64-xl-xsm <none executed> queued
test-armhf-armhf-libvirt-qcow2 <none executed> queued
test-amd64-amd64-libvirt-xsm <none executed> queued
test-amd64-amd64-migrupgrade <none executed> queued
test-amd64-amd64-xl-qcow2 <none executed> queued
test-amd64-i386-rumprun-i386 <none executed> queued
test-xtf-amd64-amd64-5 <none executed> queued
test-amd64-i386-libvirt <none executed> queued
build-armhf-libvirt <none executed> queued
test-amd64-amd64-xl-multivcpu <none executed> queued
test-amd64-i386-xl-qemut-debianhvm-amd64-xsm <none executed> queued
test-amd64-i386-xl-qemuu-winxpsp3 <none executed> queued
test-amd64-i386-freebsd10-i386 <none executed> queued
test-amd64-amd64-xl-qemut-debianhvm-amd64-xsm <none executed> queued
test-amd64-i386-xl-qemut-win7-amd64 <none executed> queued
test-amd64-amd64-xl <none executed> queued
test-amd64-i386-xl-qemuu-win7-amd64 <none executed> queued
test-amd64-amd64-xl-qemut-winxpsp3 <none executed> queued
build-amd64-rumprun <none executed> queued
test-amd64-amd64-qemuu-nested-intel <none executed> queued
test-amd64-amd64-xl-qemut-win7-amd64 <none executed> queued
test-amd64-amd64-xl-qemuu-debianhvm-amd64-xsm <none executed> queued
test-amd64-amd64-i386-pvgrub <none executed> queued
test-amd64-i386-xl-qemuu-debianhvm-amd64 <none executed> queued
test-xtf-amd64-amd64-2 <none executed> queued
test-amd64-amd64-xl-qemut-stubdom-debianhvm-amd64-xsm <none executed> queued
build-amd64-libvirt <none executed> queued
test-amd64-i386-libvirt-xsm <none executed> queued
test-xtf-amd64-amd64-4 <none executed> queued
test-amd64-amd64-rumprun-amd64 <none executed> queued
build-i386-rumprun <none executed> queued
test-armhf-armhf-xl-vhd <none executed> queued
test-amd64-i386-xl-qemuu-debianhvm-amd64-xsm <none executed> queued
test-amd64-i386-xl-xsm <none executed> queued
test-amd64-i386-xl-qemut-stubdom-debianhvm-amd64-xsm <none executed> queued
test-amd64-i386-xl-qemuu-winxpsp3-vcpus1 <none executed> queued
test-amd64-amd64-pygrub <none executed> queued
test-amd64-amd64-libvirt-pair <none executed> queued
test-amd64-i386-xl-qemut-winxpsp3-vcpus1 <none executed> queued
test-amd64-i386-xl-raw <none executed> queued
test-amd64-amd64-qemuu-nested-amd <none executed> queued
test-amd64-amd64-pair <none executed> queued
build-i386-libvirt <none executed> queued
test-amd64-i386-libvirt-pair <none executed> queued
test-armhf-armhf-xl-credit2 <none executed> queued
test-amd64-amd64-libvirt <none executed> queued
test-amd64-amd64-xl-qemuu-win7-amd64 <none executed> queued
test-armhf-armhf-xl <none executed> queued
test-amd64-amd64-libvirt-vhd <none executed> queued
test-amd64-amd64-xl-qemut-debianhvm-amd64 <none executed> queued
test-armhf-armhf-libvirt-raw <none executed> queued
test-amd64-i386-xl-qemut-debianhvm-amd64 <none executed> queued
test-amd64-i386-libvirt-qemuu-debianhvm-amd64-xsm <none executed> queued
test-amd64-i386-qemuu-rhel6hvm-amd <none executed> queued
test-amd64-i386-xl <none executed> queued
build-amd64-pvops 2 hosts-allocate running
build-amd64-xsm 2 hosts-allocate running
build-amd64-prev 2 hosts-allocate running
build-amd64 2 hosts-allocate running
build-i386-xsm 2 hosts-allocate running
build-armhf-pvops 2 hosts-allocate running
build-i386 2 hosts-allocate running
build-i386-pvops 2 hosts-allocate running
build-armhf-xsm 2 hosts-allocate running
build-i386-prev 2 hosts-allocate running
build-armhf 2 hosts-allocate running
build-amd64-xtf 2 hosts-allocate running
version targeted for testing:
xen 03da413a6465f06a2b2854f2b2645f3cae5cbc9c
baseline version:
xen 4b41252d00f1caf25a9811580a9b344db3c03708
Last test of basis 101257 2016-10-04 13:48:30 Z 22 days
Testing same since 101667 2016-10-25 15:55:00 Z 1 days 2 attempts
------------------------------------------------------------
People who touched revisions under test:
Andrew Cooper <andrew.cooper3@citrix.com>
Dario Faggioli <dario.faggioli@citrix.com>
George Dunlap <george.dunlap@citrix.com>
Igor Druzhinin <igor.druzhinin@citrix.com>
Jan Beulich <jbeulich@suse.com>
Stefano Stabellini <sstabellini@kernel.org>
Wei Liu <wei.liu2@citrix.com>
jobs:
build-amd64-xsm preparing
build-armhf-xsm preparing
build-i386-xsm preparing
build-amd64-xtf preparing
build-amd64 preparing
build-armhf preparing
build-i386 preparing
build-amd64-libvirt queued
build-armhf-libvirt queued
build-i386-libvirt queued
build-amd64-prev preparing
build-i386-prev preparing
build-amd64-pvops preparing
build-armhf-pvops preparing
build-i386-pvops preparing
build-amd64-rumprun queued
build-i386-rumprun queued
test-xtf-amd64-amd64-1 queued
test-xtf-amd64-amd64-2 queued
test-xtf-amd64-amd64-3 queued
test-xtf-amd64-amd64-4 queued
test-xtf-amd64-amd64-5 queued
test-amd64-amd64-xl queued
test-armhf-armhf-xl queued
test-amd64-i386-xl queued
test-amd64-amd64-xl-qemut-debianhvm-amd64-xsm queued
test-amd64-i386-xl-qemut-debianhvm-amd64-xsm queued
test-amd64-amd64-libvirt-qemuu-debianhvm-amd64-xsm queued
test-amd64-i386-libvirt-qemuu-debianhvm-amd64-xsm queued
test-amd64-amd64-xl-qemuu-debianhvm-amd64-xsm queued
test-amd64-i386-xl-qemuu-debianhvm-amd64-xsm queued
test-amd64-amd64-xl-qemut-stubdom-debianhvm-amd64-xsm queued
test-amd64-i386-xl-qemut-stubdom-debianhvm-amd64-xsm queued
test-amd64-amd64-libvirt-xsm queued
test-armhf-armhf-libvirt-xsm queued
test-amd64-i386-libvirt-xsm queued
test-amd64-amd64-xl-xsm queued
test-armhf-armhf-xl-xsm queued
test-amd64-i386-xl-xsm queued
test-amd64-amd64-qemuu-nested-amd queued
test-amd64-amd64-xl-pvh-amd queued
test-amd64-i386-qemut-rhel6hvm-amd queued
test-amd64-i386-qemuu-rhel6hvm-amd queued
test-amd64-amd64-xl-qemut-debianhvm-amd64 queued
test-amd64-i386-xl-qemut-debianhvm-amd64 queued
test-amd64-amd64-xl-qemuu-debianhvm-amd64 queued
test-amd64-i386-xl-qemuu-debianhvm-amd64 queued
test-amd64-i386-freebsd10-amd64 queued
test-amd64-amd64-xl-qemuu-ovmf-amd64 queued
test-amd64-i386-xl-qemuu-ovmf-amd64 queued
test-amd64-amd64-rumprun-amd64 queued
test-amd64-amd64-xl-qemut-win7-amd64 queued
test-amd64-i386-xl-qemut-win7-amd64 queued
test-amd64-amd64-xl-qemuu-win7-amd64 queued
test-amd64-i386-xl-qemuu-win7-amd64 queued
test-armhf-armhf-xl-arndale queued
test-amd64-amd64-xl-credit2 queued
test-armhf-armhf-xl-credit2 queued
test-armhf-armhf-xl-cubietruck queued
test-amd64-i386-freebsd10-i386 queued
test-amd64-i386-rumprun-i386 queued
test-amd64-amd64-qemuu-nested-intel queued
test-amd64-amd64-xl-pvh-intel queued
test-amd64-i386-qemut-rhel6hvm-intel queued
test-amd64-i386-qemuu-rhel6hvm-intel queued
test-amd64-amd64-libvirt queued
test-armhf-armhf-libvirt queued
test-amd64-i386-libvirt queued
test-amd64-amd64-migrupgrade queued
test-amd64-i386-migrupgrade queued
test-amd64-amd64-xl-multivcpu queued
test-armhf-armhf-xl-multivcpu queued
test-amd64-amd64-pair queued
test-amd64-i386-pair queued
test-amd64-amd64-libvirt-pair queued
test-amd64-i386-libvirt-pair queued
test-amd64-amd64-amd64-pvgrub queued
test-amd64-amd64-i386-pvgrub queued
test-amd64-amd64-pygrub queued
test-armhf-armhf-libvirt-qcow2 queued
test-amd64-amd64-xl-qcow2 queued
test-armhf-armhf-libvirt-raw queued
test-amd64-i386-xl-raw queued
test-amd64-amd64-xl-rtds queued
test-armhf-armhf-xl-rtds queued
test-amd64-i386-xl-qemut-winxpsp3-vcpus1 queued
test-amd64-i386-xl-qemuu-winxpsp3-vcpus1 queued
test-amd64-amd64-libvirt-vhd queued
test-armhf-armhf-xl-vhd queued
test-amd64-amd64-xl-qemut-winxpsp3 queued
test-amd64-i386-xl-qemut-winxpsp3 queued
test-amd64-amd64-xl-qemuu-winxpsp3 queued
test-amd64-i386-xl-qemuu-winxpsp3 queued
------------------------------------------------------------
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
broken-job test-armhf-armhf-xl-rtds queued
broken-job test-amd64-amd64-libvirt-qemuu-debianhvm-amd64-xsm queued
broken-job test-amd64-amd64-xl-qemuu-ovmf-amd64 queued
broken-job test-amd64-i386-pair queued
broken-job test-armhf-armhf-xl-multivcpu queued
broken-job test-armhf-armhf-libvirt-xsm queued
broken-job test-amd64-i386-qemuu-rhel6hvm-intel queued
broken-job test-amd64-i386-migrupgrade queued
broken-job test-amd64-amd64-xl-rtds queued
broken-job test-armhf-armhf-xl-xsm queued
broken-job test-amd64-i386-qemut-rhel6hvm-intel queued
broken-job test-amd64-i386-xl-qemuu-ovmf-amd64 queued
broken-job test-amd64-amd64-xl-pvh-intel queued
broken-job test-armhf-armhf-xl-arndale queued
broken-job test-xtf-amd64-amd64-1 queued
broken-job test-amd64-amd64-xl-qemuu-winxpsp3 queued
broken-job test-amd64-amd64-amd64-pvgrub queued
broken-job test-amd64-i386-qemut-rhel6hvm-amd queued
broken-job test-xtf-amd64-amd64-3 queued
broken-job test-armhf-armhf-libvirt queued
broken-job test-amd64-amd64-xl-pvh-amd queued
broken-job test-amd64-i386-freebsd10-amd64 queued
broken-job test-amd64-amd64-xl-qemuu-debianhvm-amd64 queued
broken-job test-amd64-i386-xl-qemut-winxpsp3 queued
broken-job test-amd64-amd64-xl-credit2 queued
broken-job test-armhf-armhf-xl-cubietruck queued
broken-job test-amd64-amd64-xl-xsm queued
broken-job test-armhf-armhf-libvirt-qcow2 queued
broken-job test-amd64-amd64-libvirt-xsm queued
broken-job test-amd64-amd64-migrupgrade queued
broken-job test-amd64-amd64-xl-qcow2 queued
broken-job test-amd64-i386-rumprun-i386 queued
broken-job test-xtf-amd64-amd64-5 queued
broken-job test-amd64-i386-libvirt queued
broken-job build-armhf-libvirt queued
broken-job test-amd64-amd64-xl-multivcpu queued
broken-job test-amd64-i386-xl-qemut-debianhvm-amd64-xsm queued
broken-job test-amd64-i386-xl-qemuu-winxpsp3 queued
broken-job test-amd64-i386-freebsd10-i386 queued
broken-job test-amd64-amd64-xl-qemut-debianhvm-amd64-xsm queued
broken-job test-amd64-i386-xl-qemut-win7-amd64 queued
broken-job test-amd64-amd64-xl queued
broken-job test-amd64-i386-xl-qemuu-win7-amd64 queued
broken-job test-amd64-amd64-xl-qemut-winxpsp3 queued
broken-job build-amd64-rumprun queued
broken-job test-amd64-amd64-qemuu-nested-intel queued
broken-job test-amd64-amd64-xl-qemut-win7-amd64 queued
broken-job test-amd64-amd64-xl-qemuu-debianhvm-amd64-xsm queued
broken-job test-amd64-amd64-i386-pvgrub queued
broken-job test-amd64-i386-xl-qemuu-debianhvm-amd64 queued
broken-job test-xtf-amd64-amd64-2 queued
broken-job test-amd64-amd64-xl-qemut-stubdom-debianhvm-amd64-xsm queued
broken-job build-amd64-libvirt queued
broken-job test-amd64-i386-libvirt-xsm queued
broken-job test-xtf-amd64-amd64-4 queued
broken-job test-amd64-amd64-rumprun-amd64 queued
broken-job build-i386-rumprun queued
broken-job test-armhf-armhf-xl-vhd queued
broken-job test-amd64-i386-xl-qemuu-debianhvm-amd64-xsm queued
broken-job test-amd64-i386-xl-xsm queued
broken-job test-amd64-i386-xl-qemut-stubdom-debianhvm-amd64-xsm queued
broken-job test-amd64-i386-xl-qemuu-winxpsp3-vcpus1 queued
broken-job test-amd64-amd64-pygrub queued
broken-job test-amd64-amd64-libvirt-pair queued
broken-job test-amd64-i386-xl-qemut-winxpsp3-vcpus1 queued
broken-job test-amd64-i386-xl-raw queued
broken-job test-amd64-amd64-qemuu-nested-amd queued
broken-job test-amd64-amd64-pair queued
broken-job build-i386-libvirt queued
broken-job test-amd64-i386-libvirt-pair queued
broken-job test-armhf-armhf-xl-credit2 queued
broken-job test-amd64-amd64-libvirt queued
broken-job test-amd64-amd64-xl-qemuu-win7-amd64 queued
broken-job test-armhf-armhf-xl queued
broken-job test-amd64-amd64-libvirt-vhd queued
broken-job test-amd64-amd64-xl-qemut-debianhvm-amd64 queued
broken-job test-armhf-armhf-libvirt-raw queued
broken-job test-amd64-i386-xl-qemut-debianhvm-amd64 queued
broken-job test-amd64-i386-libvirt-qemuu-debianhvm-amd64-xsm queued
broken-job test-amd64-i386-qemuu-rhel6hvm-amd queued
broken-job test-amd64-i386-xl queued
Not pushing.
------------------------------------------------------------
commit 03da413a6465f06a2b2854f2b2645f3cae5cbc9c
Author: Stefano Stabellini <sstabellini@kernel.org>
Date: Tue Oct 25 17:19:36 2016 +0200
vscsiif.h: replace PAGE_SIZE with VSCSIIF_PAGE_SIZE
Do not reference PAGE_SIZE directly: it could be undefined, or it could
have different values in the frontend or in the backend.
Define VSCSIIF_PAGE_SIZE as 4096, assuming all users of vscsiif.h have
4K page granularity. Replace PAGE_SIZE with VSCSIIF_PAGE_SIZE.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
master commit: d93539cc486aa6022195305dbea5fe12f90b69fe
master date: 2016-10-21 09:58:16 +0100
commit b7b99116e72299e15b9ecb58cfd579028e9686f1
Author: Stefano Stabellini <sstabellini@kernel.org>
Date: Tue Oct 25 17:19:12 2016 +0200
usbif.h: replace PAGE_SIZE with USBIF_RING_SIZE
Do not reference PAGE_SIZE directly: it could be undefined, or it could
have different values in the frontend or in the backend.
Define USBIF_RING_SIZE as 4096, assuming all users of usbif.h have 4K
page granularity. Replace PAGE_SIZE with USBIF_RING_SIZE.
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
master commit: 04535bee06858fd949c743cfecc4d7b96333a16c
master date: 2016-10-21 09:57:55 +0100
commit d60a4220e95458e42ff0be61bc79ac4a84aa8254
Author: Jan Beulich <jbeulich@suse.com>
Date: Tue Oct 25 17:18:41 2016 +0200
x86/Viridian: don't depend on undefined register state
The high halves of all GPRs are undefined in 32-bit and compat modes,
and the dependency is being obfuscated by our structure field names not
matching architectural register names (it was actually while putting
together a patch to correct this when I noticed the issue here).
For consistency also use the architecturally correct names on the
output side.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
master commit: a709a3a646302e95ba42beac89264f6cdacd0c64
master date: 2016-10-14 14:09:42 +0200
commit d2b7b92d7e3566d43e74a161a50bcf2942a67b33
Author: Jan Beulich <jbeulich@suse.com>
Date: Tue Oct 25 17:18:16 2016 +0200
x86emul: fix pushing of selector registers
Both explicit PUSH and far CALL currently push unrelated data (the
segment attributes word) in the high half (attributes and limit in the
64-bit case in the high 48 bits) instead of zero. To avoid having to
apply this and further changes in multiple places, also fold the two
(respectively) far call/jmp instances into one.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
master commit: 373923ed9c2ed36925f574387db2be2ebe5ce45a
master date: 2016-10-14 14:09:16 +0200
commit cadd37e106b2947e0d61f98c8e95cd3a04d5ac6d
Author: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Tue Oct 25 17:17:45 2016 +0200
x86/hvm: Clobber %cs.L when LME becomes set
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
master commit: ed00f1761689ac7b9c074e9084c81e47c25d460c
master date: 2016-10-14 12:44:29 +0100
commit ebc5d6e22c311551dad3349e0328bf57a4184049
Author: George Dunlap <george.dunlap@citrix.com>
Date: Tue Oct 25 17:17:03 2016 +0200
xen/trace: Fix trace metadata page count calculation (revert fbf96e6)
Changeset fbf96e6, "xentrace: correct formula to calculate
t_info_pages", broke the trace metadata page count calculation, by
mistaking t_info_first_offset as denominated in bytes, when in fact it
is denominated in words (uint32_t).
Effectively revert that change, and put a comment there to reduce the
chance that someone will make that mistake in the future.
Reviewed-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Tested-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Signed-off-by: George Dunlap <george.dunlap@citrix.com>
master commit: 71b8b46111219a2f83f4f9ae06ac5409744ea86e
master date: 2016-10-11 14:23:52 +0100
commit ce904f64784cc3afdb23b09de9af229b3a76a55c
Author: Jan Beulich <jbeulich@suse.com>
Date: Tue Oct 25 17:16:30 2016 +0200
x86: defer not-present segment checks
Following on from commits 5602e74c60 ("x86emul: correct loading of
%ss") and bdb860d01c ("x86/HVM: correct segment register loading during
task switch") the point of the non-.present checks needs to be refined:
#NP (and its #SS companion), other than suggested by the various
instruction pages in Intel's SDM, gets checked for only after all type
and permission checks. The only checks getting done even later are the
long mode specific ones for system descriptors (which we don't support
yet) and 64-bit code segments (i.e. anything touching other than the
attribute byte).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
x86/hvm: Correct the position of the %cs L/D checks
Contrary to the description in the software manuals, in Long Mode, attempts to
load %cs check that D is not set in combination with L before the present flag
is checked.
This can be observed because the L/D check fails with #GP before the presence
check failes with #NP.
This change partially reverts c/s 78ff18c90 "x86: defer not-present segment
checks", taking it back to how it was in the v1 submission.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
master commit: 78ff18c905318a9b1e5dd32662986f03b10a4e56
master date: 2016-10-10 12:16:49 +0200
master commit: 13b9f31751a55a96e86bd7e64b433a62a4a5b71e
master date: 2016-10-14 12:43:17 +0100
commit 92848cf9903c10a9585be6ac1fb1316c25b8dad6
Author: Dario Faggioli <dario.faggioli@citrix.com>
Date: Tue Oct 25 17:15:35 2016 +0200
xen: credit1: return the 'time remaining to the limit' as next timeslice.
If vcpu x has run for 200us, and sched_ratelimit_us is
1000us, continue running x _but_ return 1000us-200us as
the next time slice. This way, next scheduling point will
happen in 800us, i.e., exactly at the point when x crosses
the threshold, and can be descheduled (if appropriate).
Right now (without this patch), we're always returning
sched_ratelimit_us (1000us, in the example above), which
means we're (potentially) allowing x to run more than
it should have been able to.
Note that, however, in order to avoid setting timers to very
short intervals, which is part of the purpose of rate limiting,
we never use a time slice smaller than a well defined threshold.
Such threshold (CSCHED_MIN_TIMER defined in this patch) is, in
general independent from rate limiting, but it looks a good idea
to set it to the minimum possible ratelimiting value.
Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
master commit: 0053127890ebe9cafbd232752636a15881e4915a
master date: 2016-09-30 14:46:36 +0100
(qemu changes not included)
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