[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Tags removed: targetmilestone-inin---
** Tags added: targetmilestone-inin1910
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Eoan:
Fix Released
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
Cool, many thx Manoj!
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Eoan:
Fix Released
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
Fixed by https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1848039
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Eoan)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Eoan)
Status: New => Fix Released
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Released
** Changed in: ubuntu-power-systems
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Eoan:
Fix Released
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
$ uname -a
Linux bobone 5.3.0-24-generic #26-Ubuntu SMP Thu Nov 14 01:12:58 UTC 2019
ppc64le ppc64le ppc64le GNU/Linux
$ sudo ./tlbie_test
start_cpu list:0
number of worker threads:4 + 1 snapshot thread
Allocated address:0x75e53581 + secondary map:0x75e53557
logdir at : /tmp/logdir-26561
Timeout: 1200 seconds
=
Starting Test
Mon Dec 16 16:59:06 2019
=
$
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Eoan:
Fix Released
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
Triaged
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
Thanks for testing the PPA kernel. Moving back to "triaged".
** Changed in: ubuntu-power-systems
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
Incomplete
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
IBM, any progress on testing results ?
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Changed in: linux (Ubuntu)
Status: In Progress => Incomplete
** Changed in: ubuntu-power-systems
Status: In Progress => Incomplete
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: ubuntu-power-systems
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
In Progress
Status in linux package in Ubuntu:
In Progress
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
IBM can you please test the Eoan kernel in this PPA:
https://launchpad.net/~ubuntu-power-triage/+archive/ubuntu/lp1848193/
Also, please share the following information with us:
1. Your testcase, and instructions on how to run the test cases.
2. Your system config information and firmware levels.
3. Is there any significant customer impact if this is not backported to
earlier releases?
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Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Manoj Iyer (manjo)
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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[Kernel-packages] [Bug 1848193] Re: Fixup tlbie vs store ordering issue on POWER9
** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-power-systems
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
** Changed in: ubuntu-power-systems
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1848193
Title:
Fixup tlbie vs store ordering issue on POWER9
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Michael Ranweiler - 2019-10-07 01:52:38 ==
On POWER9, under some circumstances, a broadcast TLB invalidation will fail
to invalidate the ERAT cache on some threads when there are parallel
mtpidr/mtlpidr happening on other threads of the same core. This can cause
stores to continue to go to a page after it's unmapped.
The workaround is to force an ERAT flush using PID=0 or LPID=0 tlbie
flush. This additional TLB flush will cause the ERAT cache
invalidation. Since we are using PID=0 or LPID=0, we don't get
filtered out by the TLB snoop filtering logic.
We need to still follow this up with another tlbie to take care of
store vs tlbie ordering issue explained in commit: a5d4b5891c2f
("powerpc/mm: Fixup tlbie vs store ordering issue on POWER9"). The
presence of ERAT cache implies we can still get new stores and they
may miss store queue marking flush.
The upstream git commits to resolve the problem:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=677733e296b5c7a37c47da391fc70a43dc40bd67
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=09ce98cacd51fcd0fa0af2f79d1e1d3192f4cbb0
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=047e6575aec71d75b765c22111820c4776cd1c43
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