On 4/4/2016 3:36 PM, Rik van Riel wrote:
On Fri, 2016-04-01 at 15:42 -0400, Chris Metcalf wrote:
On arm64, when calling enqueue_task_fair() from
migration_cpu_stop(),
we find the nr_running value updated by add_nr_running(), but the
cfs.nr_running value has not always yet been
updated
On 4/4/2016 3:36 PM, Rik van Riel wrote:
On Fri, 2016-04-01 at 15:42 -0400, Chris Metcalf wrote:
On arm64, when calling enqueue_task_fair() from
migration_cpu_stop(),
we find the nr_running value updated by add_nr_running(), but the
cfs.nr_running value has not always yet been
updated
On 4/4/2016 3:12 PM, Rik van Riel wrote:
On Fri, 2016-04-01 at 15:42 -0400, Chris Metcalf wrote:
On arm64, when calling enqueue_task_fair() from migration_cpu_stop(),
we find the nr_running value updated by add_nr_running(), but the
cfs.nr_running value has not always yet been updated
On 4/4/2016 3:12 PM, Rik van Riel wrote:
On Fri, 2016-04-01 at 15:42 -0400, Chris Metcalf wrote:
On arm64, when calling enqueue_task_fair() from migration_cpu_stop(),
we find the nr_running value updated by add_nr_running(), but the
cfs.nr_running value has not always yet been updated
.
Correct this by using rq->nr_running instead of rq->cfs.nr_running.
This should always be more conservative, and reverts the test to the
form it had before commit 76d92ac305f2 ("sched: Migrate sched to use
new tick dependency mask model").
Signed-off-by: Chris Metcalf <cmetc...@
.
Correct this by using rq->nr_running instead of rq->cfs.nr_running.
This should always be more conservative, and reverts the test to the
form it had before commit 76d92ac305f2 ("sched: Migrate sched to use
new tick dependency mask model").
Signed-off-by: Chris Metcalf
---
I found
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf <cm
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf
---
arch/arm
g/r/1458667179-19630-1-git-send-email-cmetc...@mellanox.com
v2: Switch to using __cpuidle tagging, switch S-O-B to Mellanox
https://lkml.kernel.org/r/1458147733-29338-1-git-send-email-cmetc...@mellanox.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtr
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/
g/r/1458667179-19630-1-git-send-email-cmetc...@mellanox.com
v2: Switch to using __cpuidle tagging, switch S-O-B to Mellanox
https://lkml.kernel.org/r/1458147733-29338-1-git-send-email-cmetc...@mellanox.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtr
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c| 7 +++--
4 files changed, 23
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/linux/
-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Tested-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.lds.S| 1 +
arch/arm/kernel/vmlinux.lds
-by: Peter Zijlstra (Intel)
Tested-by: Peter Zijlstra (Intel)
Signed-off-by: Chris Metcalf
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.lds.S| 1 +
arch/arm/kernel/vmlinux.lds.S| 1 +
arch/arm64/kernel/vmlinux.lds.S | 1 +
arch/arm64
On 3/30/2016 7:42 AM, Borislav Petkov wrote:
From: Borislav Petkov<b...@suse.de>
Option is long gone, see
5d9efa7ee99e ("ipv6: Remove privacy config option.")
Signed-off-by: Borislav Petkov<b...@suse.de>
Cc: Chris Metcalf<cmetc...@ezchip.com>
Thanks! Taken i
On 3/30/2016 7:42 AM, Borislav Petkov wrote:
From: Borislav Petkov
Option is long gone, see
5d9efa7ee99e ("ipv6: Remove privacy config option.")
Signed-off-by: Borislav Petkov
Cc: Chris Metcalf
Thanks! Taken into the tile tree.
--
Chris Metcalf, Mellanox Technol
misspellings in comments.
Chris Metcalf (3):
tile kgdb: fix bug in copy to gdb regs, and optimize memset
MAINTAINERS: update arch/tile maintainer email domain
MAINTAINERS: update web link for tile architecture
MAINTAINERS | 4 ++--
arch/tile/include/hv
misspellings in comments.
Chris Metcalf (3):
tile kgdb: fix bug in copy to gdb regs, and optimize memset
MAINTAINERS: update arch/tile maintainer email domain
MAINTAINERS: update web link for tile architecture
MAINTAINERS | 4 ++--
arch/tile/include/hv
nux.intel.com>
Cc: Paul Gortmaker<paul.gortma...@windriver.com>
Cc: Dave Hansen<dave.han...@linux.intel.com>
Acked-by: Chris Metcalf <cmetc...@mellanox.com>
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
Bai
Cc: Dominik Dingel
Cc: Kirill A. Shutemov
Cc: Paul Gortmaker
Cc: Dave Hansen
Acked-by: Chris Metcalf
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Tested-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.lds.S| 1 +
arch/arm/kernel/vmlinux.lds
ing __cpuidle tagging, switch S-O-B to Mellanox
https://lkml.kernel.org/r/1458147733-29338-1-git-send-email-cmetc...@mellanox.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtrace: do a local dump_stack() instead of a self-NMI
arch/tile: adopt the
-by: Peter Zijlstra (Intel)
Tested-by: Peter Zijlstra (Intel)
Signed-off-by: Chris Metcalf
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.lds.S| 1 +
arch/arm/kernel/vmlinux.lds.S| 1 +
arch/arm64/kernel/vmlinux.lds.S | 1 +
arch/arm64
ing __cpuidle tagging, switch S-O-B to Mellanox
https://lkml.kernel.org/r/1458147733-29338-1-git-send-email-cmetc...@mellanox.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtrace: do a local dump_stack() instead of a self-NMI
arch/tile: adopt the
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/linux/
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c| 7 +++--
4 files changed, 23
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf <cm
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf
---
arch/arm
On 03/21/2016 12:32 PM, Peter Zijlstra wrote:
On Mon, Mar 21, 2016 at 12:15:12PM -0400, Chris Metcalf wrote:
On 03/21/2016 11:42 AM, Peter Zijlstra wrote:
The most common idle function for x86 is: mwait_idle_with_hints(),
trouble is, its an inline, so I'm not sure adding __cpuidle to it does
On 03/21/2016 12:32 PM, Peter Zijlstra wrote:
On Mon, Mar 21, 2016 at 12:15:12PM -0400, Chris Metcalf wrote:
On 03/21/2016 11:42 AM, Peter Zijlstra wrote:
The most common idle function for x86 is: mwait_idle_with_hints(),
trouble is, its an inline, so I'm not sure adding __cpuidle to it does
On 03/21/2016 11:42 AM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote:
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 9f7c21c22477..d569ae7fde37 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -298,7
On 03/21/2016 11:42 AM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote:
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 9f7c21c22477..d569ae7fde37 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -298,7
On 03/21/2016 11:38 AM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote:
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 48958d3cec9e..37afd721ec99 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -887,8 +887,8 @@ static void
On 03/21/2016 11:38 AM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:13PM -0400, Chris Metcalf wrote:
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 48958d3cec9e..37afd721ec99 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -887,8 +887,8 @@ static void
On 03/21/2016 10:34 AM, Michal Hocko wrote:
On Fri 11-03-16 17:10:11, Chris Metcalf wrote:
In commit f01f17d3705b ("mm, vmstat: make quiet_vmstat lighter")
the quiet_vmstat() function became asynchronous, in the sense that
the vmstat work was still scheduled to run on the core when th
On 03/21/2016 10:34 AM, Michal Hocko wrote:
On Fri 11-03-16 17:10:11, Chris Metcalf wrote:
In commit f01f17d3705b ("mm, vmstat: make quiet_vmstat lighter")
the quiet_vmstat() function became asynchronous, in the sense that
the vmstat work was still scheduled to run on the core when th
dle. That might be more usefully
done by someone with arm platform experience in a follow-up patch.
v1 of the series is here:
https://lkml.kernel.org/r/1456782024-7122-1-git-send-email-cmetc...@ezchip.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtr
dle. That might be more usefully
done by someone with arm platform experience in a follow-up patch.
v1 of the series is here:
https://lkml.kernel.org/r/1456782024-7122-1-git-send-email-cmetc...@ezchip.com
Chris Metcalf (4):
nmi_backtrace: add more trigger_*_cpu_backtrace() methods
nmi_backtr
y grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the
interrupted PC to see if it lies within that section.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.l
y grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the
interrupted PC to see if it lies within that section.
Signed-off-by: Chris Metcalf
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arc/kernel/vmlinux.lds.S| 1 +
arch/
On 3/17/2016 3:36 PM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:10PM -0400, Chris Metcalf wrote:
Currently you can only request a backtrace of either all cpus, or
all cpus but yourself. It can also be helpful to request a remote
backtrace of a single cpu, and since we want
On 3/17/2016 3:36 PM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:10PM -0400, Chris Metcalf wrote:
Currently you can only request a backtrace of either all cpus, or
all cpus but yourself. It can also be helpful to request a remote
backtrace of a single cpu, and since we want
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c
backtrace if the old one was still in progress.
Signed-off-by: Chris Metcalf
---
arch/tile/include/asm/irq.h | 4 +--
arch/tile/kernel/pmc.c | 3 --
arch/tile/kernel/process.c | 72 ++---
arch/tile/kernel/traps.c| 7 +++--
4 files changed, 23
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf <cm
. The register state will be missing,
but that state is likely not particularly helpful in any case.
Or, if we think it is helpful, we should be capturing and emitting
the current register state in all cases when regs == NULL is passed
to nmi_cpu_backtrace().
Signed-off-by: Chris Metcalf
---
arch/arm
attempts.
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
attempts.
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
you saw with Mark's
original patch are improved with this version, which still tests
the TIF flags prior to calling out to the loop in C code.
Thanks!
On 03/11/2016 05:10 PM, Chris Metcalf wrote:
Currently ret_fast_syscall, work_pending, and ret_to_user form an ad-hoc
state machine that can
you saw with Mark's
original patch are improved with this version, which still tests
the TIF flags prior to calling out to the loop in C code.
Thanks!
On 03/11/2016 05:10 PM, Chris Metcalf wrote:
Currently ret_fast_syscall, work_pending, and ret_to_user form an ad-hoc
state machine that can
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/
ted
to using the new cpumask approach in this change.
Signed-off-by: Chris Metcalf
---
arch/arm/include/asm/irq.h| 4 +--
arch/arm/kernel/smp.c | 4 +--
arch/x86/include/asm/irq.h| 4 +--
arch/x86/kernel/apic/hw_nmi.c | 6 ++---
include/linux/
On 3/17/2016 6:38 PM, Peter Zijlstra wrote:
On Thu, Mar 17, 2016 at 06:31:44PM -0400, Chris Metcalf wrote:
On 3/17/2016 3:36 PM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:10PM -0400, Chris Metcalf wrote:
Currently you can only request a backtrace of either all cpus, or
all cpus
On 3/17/2016 6:38 PM, Peter Zijlstra wrote:
On Thu, Mar 17, 2016 at 06:31:44PM -0400, Chris Metcalf wrote:
On 3/17/2016 3:36 PM, Peter Zijlstra wrote:
On Wed, Mar 16, 2016 at 01:02:10PM -0400, Chris Metcalf wrote:
Currently you can only request a backtrace of either all cpus, or
all cpus
to do so.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
include/linux/isolation.h | 10 +++
include/uapi/linux/prctl.h | 3 ++
kernel/isolation.c | 73 ++
3 files changed, 86 insertions(+)
diff --git a/include/linux/isolati
to trace_hardirqs_on just before the
return to userspace.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/arm64/kernel/entry.S | 12
arch/arm64/kernel/signal.c | 36 ++--
2 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/arch
to do so.
Signed-off-by: Chris Metcalf
---
include/linux/isolation.h | 10 +++
include/uapi/linux/prctl.h | 3 ++
kernel/isolation.c | 73 ++
3 files changed, 86 insertions(+)
diff --git a/include/linux/isolation.h b/include/linux
to trace_hardirqs_on just before the
return to userspace.
Signed-off-by: Chris Metcalf
---
arch/arm64/kernel/entry.S | 12
arch/arm64/kernel/signal.c | 36 ++--
2 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/arch/arm64/kernel/entry.S b/arch
This option, similar to NO_HZ_FULL_ALL, simplifies configuring
a system to boot by default with all cores except the boot core
running in task isolation mode.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
init/Kconfig | 10 ++
kernel/isolation.c | 6 ++
2
l properly re-enable it.
This fix avoids a small performance hiccup for regular applications,
but for TASK_ISOLATION code, it fixes a potentially serious
kernel timer interruption to the time-sensitive application.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/tile/kernel/time.c
This option, similar to NO_HZ_FULL_ALL, simplifies configuring
a system to boot by default with all cores except the boot core
running in task isolation mode.
Signed-off-by: Chris Metcalf
---
init/Kconfig | 10 ++
kernel/isolation.c | 6 ++
2 files changed, 16 insertions
l properly re-enable it.
This fix avoids a small performance hiccup for regular applications,
but for TASK_ISOLATION code, it fixes a potentially serious
kernel timer interruption to the time-sensitive application.
Signed-off-by: Chris Metcalf
---
arch/tile/kernel/time.c | 1 +
This function checks to see if a vmstat worker is not running,
and the vmstat diffs don't require an update. The function is
called from the task-isolation code to see if we need to
actually do some work to quiet vmstat.
Acked-by: Christoph Lameter <c...@linux.com>
Signed-off-by: Chris M
patches that follow provide these changes for x86, tile,
and arm64.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
Documentation/kernel-parameters.txt | 8 ++
drivers/base/cpu.c | 18 +
include/linux/isolation.h | 48
include/l
This function checks to see if a vmstat worker is not running,
and the vmstat diffs don't require an update. The function is
called from the task-isolation code to see if we need to
actually do some work to quiet vmstat.
Acked-by: Christoph Lameter
Signed-off-by: Chris Metcalf
---
include
patches that follow provide these changes for x86, tile,
and arm64.
Signed-off-by: Chris Metcalf
---
Documentation/kernel-parameters.txt | 8 ++
drivers/base/cpu.c | 18 +
include/linux/isolation.h | 48
include/linux/sched.h
This per-cpu check was being done in the loop in lru_add_drain_all(),
but having it be callable for a particular cpu is helpful for the
task-isolation patches.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
include/linux/swap.h | 1 +
mm/swap.c| 15 ++-
2
This per-cpu check was being done in the loop in lru_add_drain_all(),
but having it be callable for a particular cpu is helpful for the
task-isolation patches.
Signed-off-by: Chris Metcalf
---
include/linux/swap.h | 1 +
mm/swap.c| 15 ++-
2 files changed, 11 insertions
chieve its primary goal of enabling
truly tick-free operation, but that is ongoing orthogonal work.
The series is available at:
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile.git
dataplane
Chris Metcalf (13):
vmstat: add quiet_vmstat_sync function
vmstat: add vmstat_idl
chieve its primary goal of enabling
truly tick-free operation, but that is ongoing orthogonal work.
The series is available at:
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile.git
dataplane
Chris Metcalf (13):
vmstat: add quiet_vmstat_sync function
vmstat: add vmstat_idl
ating code what remote core and context
is preparing to deliver an interrupt to a task_isolation core.
Additionally, delivering a signal to the process in STRICT mode
allows applications to report up task isolation failures into their
own application logging framework.
Signed-off-by: Chris Metc
not generate signals to the application.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/tile/include/asm/thread_info.h | 4 +++-
arch/tile/kernel/process.c | 9 +
arch/tile/kernel/ptrace.c | 7 +++
arch/tile/kernel/single_step.c | 5 +
detection of syscalls.
We add strict reporting for the kernel exception types that do
not result in signals, namely non-signalling page faults and
non-signalling MPX fixups.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/x86/entry/common.c| 18 +-
ar
ating code what remote core and context
is preparing to deliver an interrupt to a task_isolation core.
Additionally, delivering a signal to the process in STRICT mode
allows applications to report up task isolation failures into their
own application logging framework.
Signed-off-by: Chr
not generate signals to the application.
Signed-off-by: Chris Metcalf
---
arch/tile/include/asm/thread_info.h | 4 +++-
arch/tile/kernel/process.c | 9 +
arch/tile/kernel/ptrace.c | 7 +++
arch/tile/kernel/single_step.c | 5 +
arch/tile/kernel/smp.c
detection of syscalls.
We add strict reporting for the kernel exception types that do
not result in signals, namely non-signalling page faults and
non-signalling MPX fixups.
Signed-off-by: Chris Metcalf
---
arch/x86/entry/common.c| 18 +-
arch/x86/include/asm
ly to turn task isolation off
before starting to use kernel services.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
include/uapi/linux/prctl.h | 1 +
kernel/isolation.c | 7 +++
2 files changed, 8 insertions(+)
diff --git a/include/uapi/linux/prctl.h b/include/uapi/lin
hem in strict or debug mode.
Finally, add an explicit check for STRICT mode in do_mem_abort()
to handle the case of page faults.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
arch/arm64/include/asm/thread_info.h | 5 -
arch/arm64/kernel/ptrace.c | 15 ---
ly to turn task isolation off
before starting to use kernel services.
Signed-off-by: Chris Metcalf
---
include/uapi/linux/prctl.h | 1 +
kernel/isolation.c | 7 +++
2 files changed, 8 insertions(+)
diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h
index a5
hem in strict or debug mode.
Finally, add an explicit check for STRICT mode in do_mem_abort()
to handle the case of page faults.
Signed-off-by: Chris Metcalf
---
arch/arm64/include/asm/thread_info.h | 5 -
arch/arm64/kernel/ptrace.c | 15 ---
arch/arm64/kernel/signal.c
guarantees that the vmstat worker
will not run on the core on return from the function. Add a
quiet_vmstat_sync() function with that semantic.
Signed-off-by: Chris Metcalf <cmetc...@mellanox.com>
---
include/linux/vmstat.h | 2 ++
mm/vmstat.c| 9 +
2 files changed, 11 ins
guarantees that the vmstat worker
will not run on the core on return from the function. Add a
quiet_vmstat_sync() function with that semantic.
Signed-off-by: Chris Metcalf
---
include/linux/vmstat.h | 2 ++
mm/vmstat.c| 9 +
2 files changed, 11 insertions(+)
diff --git a/inc
On 3/9/2016 4:07 PM, Andy Lutomirski wrote:
On Wed, Mar 9, 2016 at 1:05 PM, Chris Metcalf <cmetc...@mellanox.com> wrote:
On 3/9/2016 3:58 PM, Andy Lutomirski wrote:
My preference would be not to have to require all task-isolation users
to also figure out all the complexities of creati
On 3/9/2016 4:07 PM, Andy Lutomirski wrote:
On Wed, Mar 9, 2016 at 1:05 PM, Chris Metcalf wrote:
On 3/9/2016 3:58 PM, Andy Lutomirski wrote:
My preference would be not to have to require all task-isolation users
to also figure out all the complexities of creating BPF programs, so
my
is surely writing:)
Happily, task isolation is so simple an API that all that is needed is a
prctl().
... Unless somehow a requirement to inflict a huge blob of eBPF into the kernel
just to use task isolation safely is added, of course :-)
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
is surely writing:)
Happily, task isolation is so simple an API that all that is needed is a
prctl().
... Unless somehow a requirement to inflict a huge blob of eBPF into the kernel
just to use task isolation safely is added, of course :-)
--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com
mail thread with Andy
Lutomirski. Whether it gets included in v11 is still TBD.
TL;DR: Various minor issues in answer to Frederic's comments :-)
=
On 03/04/2016 07:56 AM, Frederic Weisbecker wrote:
On Thu, Feb 11, 2016 at 02:24:25PM -0500, Chris Metcalf wrote:
We don't want
mail thread with Andy
Lutomirski. Whether it gets included in v11 is still TBD.
TL;DR: Various minor issues in answer to Frederic's comments :-)
=
On 03/04/2016 07:56 AM, Frederic Weisbecker wrote:
On Thu, Feb 11, 2016 at 02:24:25PM -0500, Chris Metcalf wrote:
We don't want
/* Common entry point for both prctl and syscall. */
@@ -824,6 +905,8 @@ static long do_seccomp(unsigned int op, unsigned int flags,
return seccomp_set_mode_strict();
case SECCOMP_SET_MODE_FILTER:
return seccomp_set_mode_filter(flags, uargs);
+
/* Common entry point for both prctl and syscall. */
@@ -824,6 +905,8 @@ static long do_seccomp(unsigned int op, unsigned int flags,
return seccomp_set_mode_strict();
case SECCOMP_SET_MODE_FILTER:
return seccomp_set_mode_filter(flags, uargs);
+
On 03/03/2016 06:46 PM, Andy Lutomirski wrote:
On Thu, Mar 3, 2016 at 11:52 AM, Chris Metcalf <cmetc...@mellanox.com> wrote:
On 03/02/2016 07:36 PM, Andy Lutomirski wrote:
On Mar 2, 2016 12:10 PM, "Chris Metcalf" <cmetc...@ezchip.com> wrote:
In prepare_ex
On 03/03/2016 06:46 PM, Andy Lutomirski wrote:
On Thu, Mar 3, 2016 at 11:52 AM, Chris Metcalf wrote:
On 03/02/2016 07:36 PM, Andy Lutomirski wrote:
On Mar 2, 2016 12:10 PM, "Chris Metcalf" wrote:
In prepare_exit_to_usermode(), call task_isolation_ready()
when we are checking the t
On 03/07/2016 04:48 AM, Peter Zijlstra wrote:
On Tue, Mar 01, 2016 at 11:01:42AM -0500, Chris Metcalf wrote:
+++ b/kernel/sched/idle.c
@@ -52,15 +52,25 @@ static int __init cpu_idle_nopoll_setup(char *__unused)
__setup("hlt", cpu_idle_nopoll_setup);
#endif
+static DEFINE_PE
On 03/07/2016 04:48 AM, Peter Zijlstra wrote:
On Tue, Mar 01, 2016 at 11:01:42AM -0500, Chris Metcalf wrote:
+++ b/kernel/sched/idle.c
@@ -52,15 +52,25 @@ static int __init cpu_idle_nopoll_setup(char *__unused)
__setup("hlt", cpu_idle_nopoll_setup);
#endif
+static DEFINE_PE
On 03/07/2016 03:26 AM, Daniel Thompson wrote:
Chris Metcalf wrote:
+static DEFINE_PER_CPU(bool, cpu_idling);
+
+/* Was the cpu was in the low-level idle code when interrupted? */
+bool in_cpu_idle(void)
+{
+return this_cpu_read(cpu_idling);
I think we continue to need the code to identify
On 03/07/2016 03:26 AM, Daniel Thompson wrote:
Chris Metcalf wrote:
+static DEFINE_PER_CPU(bool, cpu_idling);
+
+/* Was the cpu was in the low-level idle code when interrupted? */
+bool in_cpu_idle(void)
+{
+return this_cpu_read(cpu_idling);
I think we continue to need the code to identify
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