The following commit has been merged into the sched/core branch of tip:
Commit-ID: 90f093fa8ea48e5d991332cee160b761423d55c1
Gitweb:
https://git.kernel.org/tip/90f093fa8ea48e5d991332cee160b761423d55c1
Author:Piotr Figiel
AuthorDate:Fri, 26 Feb 2021 14:51:56 +01:00
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 2c406d3f436db1deea55ec44cc4c3c0861c3c185
Gitweb:
https://git.kernel.org/tip/2c406d3f436db1deea55ec44cc4c3c0861c3c185
Author:Piotr Figiel
AuthorDate:Fri, 26 Feb 2021 14:51:56 +01:00
On Tue, Feb 02, 2021 at 06:37:09PM +0100, Piotr Figiel wrote:
> For userspace checkpoint and restore (C/R) some way of getting process
> state containing RSEQ configuration is needed.
[...]
> To achieve above goals expose the RSEQ ABI address and the signature
> value with the new
Hi,
On Fri, Feb 26, 2021 at 10:32:35AM -0500, Mathieu Desnoyers wrote:
> > +static long ptrace_get_rseq_configuration(struct task_struct *task,
> > + unsigned long size, void __user *data)
> > +{
> > + struct ptrace_rseq_configuration conf = {
> > +
Hi,
On Mon, Feb 22, 2021 at 09:53:17AM -0500, Mathieu Desnoyers wrote:
> I notice that other structures defined in this UAPI header are not
> packed as well. Should we add an attribute packed on new structures ?
> It seems like it is generally a safer course of action, even though
> each field i
es in progress.
Signed-off-by: Piotr Figiel
Reviewed-by: Michal Miroslaw
---
v2:
Applied review comments:
- changed return value from the ptrace request to the size of the
configuration structure
- expanded configuration structure with the flags field and
the rseq abi structure siz
es in progress.
Signed-off-by: Piotr Figiel
Reviewed-by: Michal Miroslaw
---
include/uapi/linux/ptrace.h | 8
kernel/ptrace.c | 23 +++
2 files changed, 31 insertions(+)
diff --git a/include/uapi/linux/ptrace.h b/include/uapi/linux/ptrace.h
s and the signature
value with the new procfs file "/proc//rseq".
Signed-off-by: Piotr Figiel
---
v4:
- added documentation and extended comment before task_lock()
v3:
- added locking so that the proc file always shows consistent pair of
RSEQ ABI address and the signature
-
On Tue, Jan 26, 2021 at 03:58:46PM -0500, Mathieu Desnoyers wrote:
> - On Jan 26, 2021, at 1:54 PM, Piotr Figiel fig...@google.com wrote:
> [...]
> > diff --git a/kernel/rseq.c b/kernel/rseq.c
> > index a4f86a9d6937..6aea67878065 100644
> > --- a/kernel/rseq.c
On Tue, Jan 26, 2021 at 11:25:47AM -0800, Andrew Morton wrote:
> On Tue, 26 Jan 2021 19:54:12 +0100 Piotr Figiel wrote:
> > To achieve above goals expose the RSEQ structure address and the
> > signature value with the new per-thread procfs file "rseq".
> Using
cture address and the
signature value with the new per-thread procfs file "rseq".
Signed-off-by: Piotr Figiel
---
v3:
- added locking so that the proc file always shows consistent pair of
RSEQ ABI address and the signature
- changed string formatting to use %px for the RSEQ ABI addre
Hi, thanks for review.
On Fri, Jan 15, 2021 at 10:44:20AM -0500, Mathieu Desnoyers wrote:
> - On Jan 14, 2021, at 1:54 PM, Piotr Figiel fig...@google.com wrote:
> Added PeterZ, Paul and Boqun to CC. They are also listed as maintainers of
> rseq.
> Please CC them in your next roun
On Thu, Jan 14, 2021 at 12:32:30AM +0300, Alexey Dobriyan wrote:
> On Wed, Jan 13, 2021 at 06:41:27PM +0100, Piotr Figiel wrote:
> > For userspace checkpoint and restore (C/R) some way of getting process
> > state containing RSEQ configuration is needed.
> > + seq_pri
doesn't cause RSEQ abort.
Restoring the instruction pointer within the critical section is
problematic because rseq_cs may get cleared before the control is
passed to the migrated application code leading to RSEQ invariants not
being preserved.
Signed-off-by: Piotr Figiel
---
v2:
- fixed s
doesn't cause RSEQ abort.
Restoring the instruction pointer within the critical section is
problematic because rseq_cs may get cleared before the control is
passed to the migrated application code leading to RSEQ invariants not
being preserved.
Signed-off-by: Piotr Figiel
---
fs/proc/base.c
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