an ABI difference)
Kernel sends 64-bit xfrm messages to the userspace for:
- multicast (monitor events)
- netlink dumps
Wire up the translator to xfrm_nlmsg_multicast().
Signed-off-by: Dmitry Safonov
---
include/net/xfrm.h | 5 +
net/xfrm/xfrm_compat.c | 296
| |
| |
The parent sends the description of a test (xfrm parameters) to the
child, the child and grand child setup a tunnel over veth interface and
test it by sending udp packets.
Cc: Shuah Khan
Cc: linux-kselft...@vger.kernel.org
Signed-off-by: Dmitry Safonov
---
MAINTAINERS
On 9/7/20 12:24 PM, Steffen Klassert wrote:
[..]
> One comment on this. Looks like the above is the same in all
> commit messages. Please provide that generic information
> with the patch 0/n and remove it from the other patches.
Yeah, I think I've used to that from x86/core submissions - they
On 9/7/20 10:43 AM, Steffen Klassert wrote:
> On Wed, Aug 26, 2020 at 02:49:43AM +0100, Dmitry Safonov wrote:
[..]
>
> Thanks for the patches, looks good!
>
> Please fix the issue reported from 'kernel test robot' and resend.
Thanks, will do!
--
Dmitry
On 8/26/20 8:19 AM, Johannes Berg wrote:
> On Wed, 2020-08-26 at 02:49 +0100, Dmitry Safonov wrote:
[..]
>> +nl_dump_check_consistent(cb, nlh);
>> +memcpy(nlmsg_data(nlh), >dump_done_errno,
>> +sizeof(nlk->dump_done_errno));
>
>
Hello,
On Wed, 26 Aug 2020 at 15:39, Michael Ellerman wrote:
> Christophe Leroy writes:
[..]
> > arch_remap() gets replaced by vdso_remap()
> >
> > For arch_unmap(), I'm wondering how/what other architectures do, because
> > powerpc seems to be the only one to erase the vdso context pointer
Xu
Cc: Jakub Kicinski
Cc: Steffen Klassert
Cc: Stephen Suryaputra
Cc: Dmitry Safonov <0x7f454...@gmail.com>
Cc: net...@vger.kernel.org
Dmitry Safonov (6):
xfrm/compat: Add 64=>32-bit messages translator
xfrm/compat: Attach xfrm dumps to 64=>32 bit translator
netlink/compat: App
https://lkml.kernel.org/r/20180726023144.31066-1-d...@arista.com
Signed-off-by: Dmitry Safonov
---
include/net/xfrm.h | 11 ++
net/xfrm/Kconfig | 3 +-
net/xfrm/xfrm_compat.c | 276 +
net/xfrm/xfrm_user.c | 50 +---
4 files changed, 321 i
44.31066-1-d...@arista.com
Signed-off-by: Dmitry Safonov
---
include/net/xfrm.h | 10 ++
net/xfrm/Kconfig | 10 ++
net/xfrm/Makefile | 1 +
net/xfrm/xfrm_compat.c | 302 +
net/xfrm/xfrm_user.c | 9 +-
5 files changed, 331 insertions(+),
In these patches, his idea is reused and some of his
initial code is also present.
Provide compat_xfrm_userpolicy_info translation for xfrm setsocketopt().
Reallocate buffer and put the missing padding for 64-bit message.
[1]: https://lkml.kernel.org/r/20180726023144.31066-1-d...@arista.com
Sig
will retrieve
all netlink dump data, but will then get an unexpected EOF.
Cc: Johannes Berg
Signed-off-by: Florian Westphal
Signed-off-by: Dmitry Safonov
---
net/netlink/af_netlink.c | 48
1 file changed, 34 insertions(+), 14 deletions(-)
diff --git a/net/netlink
r/20180726023144.31066-1-d...@arista.com
Signed-off-by: Dmitry Safonov
---
include/net/xfrm.h | 6 ++
net/xfrm/xfrm_compat.c | 10 --
net/xfrm/xfrm_user.c | 20
3 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/include/net/xfrm.h b/include/net
| |
| |
The parent sends the description of a test (xfrm parameters) to the
child, the child and grand child setup a tunnel over veth interface and
test it by sending udp packets.
Cc: Shuah Khan
Cc: linux-kselft...@vger.kernel.org
Signed-off-by: Dmitry Safonov
---
MAINTAINERS
The following commit has been merged into the x86/core branch of tip:
Commit-ID: fd07f802a70935fbbfb9cc2d11e1d8ac95f28e44
Gitweb:
https://git.kernel.org/tip/fd07f802a70935fbbfb9cc2d11e1d8ac95f28e44
Author:Dmitry Safonov
AuthorDate:Mon, 29 Jun 2020 15:48:45 +01:00
The following commit has been merged into the x86/core branch of tip:
Commit-ID: 44e215352cf17333992d56941b5bf4af60a67609
Gitweb:
https://git.kernel.org/tip/44e215352cf17333992d56941b5bf4af60a67609
Author:Dmitry Safonov
AuthorDate:Mon, 29 Jun 2020 15:48:46 +01:00
The following commit has been merged into the x86/core branch of tip:
Commit-ID: ef2ff0f5d6008d325c9a068e20981c0d0acc4d6b
Gitweb:
https://git.kernel.org/tip/ef2ff0f5d6008d325c9a068e20981c0d0acc4d6b
Author:Dmitry Safonov
AuthorDate:Mon, 29 Jun 2020 15:48:47 +01:00
Hi Ingo, Thomas,
Could you take these to x86/tip tree?
(in case they are good enough)
On 6/29/20 3:48 PM, Dmitry Safonov wrote:
> Changes since v1 [3]:
> - Use (enum show_regs_mode) instead of (int) [nit by Jann, thanks!]
> - Add acks from Petr
>
> show_trace_log_lvl() provid
...@arista.com/
Acked-by: Petr Mladek
Signed-off-by: Dmitry Safonov
---
arch/x86/kernel/dumpstack.c | 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 4954d6678cef..f9a3526af15d 100644
--- a/arch/x86/kernel
parameter to show_iret_regs() as a preparation to add it
to __show_regs() and show_regs_if_on_stack().
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
Acked-by: Petr Mladek
Signed-off-by: Dmitry
Handa
Cc: Thomas Gleixner
Cc: x...@kernel.org
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
[3]: https://lore.kernel.org/lkml/20200623162958.331051-1-d...@arista.com/
Dmitry Safonov (3):
x86
parameter to __show_regs().
Keep the used log level intact to separate visible change.
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
Acked-by: Petr Mladek
Signed-off-by: Dmitry Safonov
On 6/23/20 5:45 PM, Jann Horn wrote:
> On Tue, Jun 23, 2020 at 6:30 PM Dmitry Safonov wrote:
>> show_trace_log_lvl() provides x86 platform-specific way to unwind
>> backtrace with a given log level. Unfortunately, registers dump(s) are
>> not printed with the sam
On 6/24/20 7:50 AM, Petr Mladek wrote:
> On Tue 2020-06-23 17:29:55, Dmitry Safonov wrote:
>> show_trace_log_lvl() provides x86 platform-specific way to unwind
>> backtrace with a given log level. Unfortunately, registers dump(s) are
>> not printed with the same log level -
...@arista.com/
Signed-off-by: Dmitry Safonov
---
arch/x86/kernel/dumpstack.c | 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index ec90d71979f4..6b00964d5873 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86
ta.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
Dmitry Safonov (3):
x86/dumpstack: Add log_lvl to show_iret_regs()
x86/dumpstack: Add log_lvl to __show_regs()
x86/dumpstack: Show registers dump with trace's log level
arch/x86/include/asm/kdebug.h | 5
parameter to __show_regs().
Keep the used log level intact to separate visible change.
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
Signed-off-by: Dmitry Safonov
---
arch/x86/include/asm
parameter to show_iret_regs() as a preparation to add it
to __show_regs() and show_regs_if_on_stack().
[1]: https://lore.kernel.org/lkml/20190528002412.1625-1-d...@arista.com/
[2]: https://lore.kernel.org/linux-doc/20190724170249.9644-1-d...@arista.com/
Signed-off-by: Dmitry Safonov
---
arch/x86
Hi Mark,
On 6/16/20 12:24 PM, Mark Rutland wrote:
> On Tue, Jun 16, 2020 at 12:55:41AM -0700, Andrei Vagin wrote:
[..]
>> Whenever a task changes its namespace, the VVAR
>> page tables are cleared and then they will be re-faulted with a
>> corresponding layout.
>
> How does this work for
-by: Johan Hovold
Reviewed-by: Dmitry Safonov <0x7f454...@gmail.com>
Thanks,
Dmitry
ot;serial_core: Move sysrq functions from header file")
> Cc: Dmitry Safonov <0x7f454...@gmail.com>
> Signed-off-by: Johan Hovold
Thanks for sending and the numbers, it's a bit pity that we need to move
them back to the header, but as it matters for your setup,
Reviewed-by: Dmitry Safonov <0x7f454...@gmail.com>
Thanks,
Dmitry
On 6/12/20 4:29 PM, Johan Hovold wrote:
> On Wed, Jun 10, 2020 at 05:24:57PM +0100, Dmitry Safonov wrote:
>> Hi Johan,
>>
>> On 6/10/20 4:22 PM, Johan Hovold wrote:
>>> Commit 8e20fc391711 ("serial_core: Move sysrq functions from header
>>> file"
Hi Christian,
On 6/11/20 12:02 PM, Christian Brauner wrote:
> Hey,
>
> I'm about to finish a patch to add CLONE_NEWTIME support to setns().
> Since setns() now allows to attach to a multiple namespaces at the same
> time I've also reworked it to be atomic (already upstream). Either all
>
Hi Johan,
On 6/10/20 4:22 PM, Johan Hovold wrote:
> Commit 8e20fc391711 ("serial_core: Move sysrq functions from header
> file") converted the inline sysrq helpers to exported functions which
> are now called for every received character, interrupt and break signal
> also on systems without
t in __arch_get_timens_vdso_data.
>
> Reviewed-by: Vincenzo Frascino
> Cc: Thomas Gleixner
> Cc: Dmitry Safonov
>
> v3 on github (if someone prefers `git pull` to `git am`):
> https://github.com/avagin/linux-task-diag/tree/arm64/timens-v3
Thanks for adding arm64 sup
Hi Andrei,
On 6/2/20 7:02 PM, Andrei Vagin wrote:
[..]
> --- a/arch/arm64/include/asm/vdso.h
> +++ b/arch/arm64/include/asm/vdso.h
> @@ -12,6 +12,12 @@
> */
> #define VDSO_LBASE 0x0
>
> +#ifdef CONFIG_TIME_NS
> +#define __VVAR_PAGES2
> +#else
> +#define __VVAR_PAGES1
> +#endif
> +
On 6/2/20 3:48 PM, Andy Shevchenko wrote:
> On Tue, Jun 2, 2020 at 5:03 PM Johan Hovold wrote:
>>
>> Commit d6e1935819db ("serial: core: Allow processing sysrq at port
>> unlock time") worked around a circular locking dependency by adding
>> helpers used to defer sysrq processing to when the port
Hi Andrew,
On 5/15/20 8:23 PM, Andrew Morton wrote:
> On Sat, 18 Apr 2020 21:19:06 +0100 Dmitry Safonov wrote:
>
>> Currently, the log-level of show_stack() depends on a platform
>> realization. It creates situations where the headers are printed with
>> lower
Hi Mike,
On 5/11/20 8:45 PM, Mike Rapoport wrote:
[..]
>> @@ -511,7 +515,7 @@ void show_stack(struct task_struct *task, unsigned long
>> *sp)
>> print_hex_dump(KERN_INFO, " ", DUMP_PREFIX_NONE,
>> STACK_DUMP_LINE_SIZE, STACK_DUMP_ENTRY_SIZE,
>> sp,
=
Thanks for the patch!
I'm in process of reworking the patch in akpm according to reviews,
I will incorporate your change in next version.
>
> Signed-off-by: Randy Dunlap
> Cc: Dmitry Safonov
> Cc: Andrew Morton
> Cc: Ingo Molnar
> ---
> Documentation/admin-guide/
On 10/16/19 11:44 AM, Vincenzo Frascino wrote:
> On 10/16/19 11:39 AM, Thomas Gleixner wrote:
[..]
>> config TIME_NS
>> bool "TIME namespace"
>> depends on GENERIC_VDSO_TIME_NS
>> default y
>>
>> and in lib/vdso/Kconfig
>>
>> config GENERIC_VDSO_TIME_NS
>> bool
>>
>> and let
From: Andrei Vagin
Introduce offsets for time namespace. They will contain an adjustment
needed to convert clocks to/from host's.
A new namespace is created with the same offsets as the time namespace
of the current process.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed
From: Andrei Vagin
timerfd_settime() accepts an absolute value of the expiration time if
TFD_TIMER_ABSTIME is specified. This value is in task's time namespace
and has to be converted to the host's time namespace.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off
support of time namespaces:
1..3
not ok 1 # SKIP Time namespaces are not supported
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/timens/.gitignore | 1 +
tools/testing/selftests/timens/Makefile | 3 +-
tools/testing
gested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 19 ++-
kernel/time/posix-timers.c | 26 +-
kernel/time/posix-timers.h | 3 +++
3 files changed, 46 insertions
| 0.1
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
include/vdso/helpers.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/vdso/helpers.h b/include/vdso/helpers.h
index 01641dbb68ef..9a2af9fca45e 100644
--- a/include
ime
and then timens_ktime_to_host() can be used to convert namespace's time
to the host time.
Inside a time namespace kernel's time differ on a fixed offset from
a user-supplied, but only absolute values (TIMER_ABSTIME) must
be converted.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safo
e time namespace handling path.
To prepare timens page kernel needs to know the vdso_data offset.
Provide arch_get_vdso_data() helper for locating vdso_data on VVAR page.
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/entry/vdso/vdso-layout.lds.
From: Andrei Vagin
clock_nanosleep() accepts absolute values of expiration time, if the
TIMER_ABSTIME flag is set. This value is in the task time namespace,
which has to be converted to the host time namespace.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry
From: Andrei Vagin
Now, when the clock_get_ktime() callback exists, the suboptimal
timespec64-based conversion can be removed from common_timer_get().
Suggested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time
As timens page has offsets to data on VVAR page VVAR is going
to be accessed shortly. Set it up with timens in one page fault
as optimization.
Suggested-by: Thomas Gleixner
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/entry/vdso/vma.c
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/entry/vdso/vma.c | 13 +
1 file changed, 13 insertions(+)
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index f5937742b290..000db8282cc8 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86
tional check for vdso_data->clock_mode is added which switches to
the real vdso when the clock_mode is VCLOCK_TIMENS.
Suggested-by: Andy Lutomirski
Signed-off-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
include/linux/time.h| 6 ++
include/vdso/d
not ok 3 clockid: 9 elapsed: 0
Bail out!
Output with lack of permissions:
1..3
not ok 1 # SKIP need to run as root
Output without support of time namespaces:
1..3
not ok 1 # SKIP Time namespaces are not supported
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off
-by: Dmitry Safonov
---
arch/x86/entry/vdso/vma.c | 27 +++
include/linux/time_namespace.h | 3 +++
kernel/time/namespace.c| 10 ++
3 files changed, 40 insertions(+)
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index d6cb8a16f368
Thomas Gleixner
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
include/linux/time_namespace.h | 3 +
kernel/time/namespace.c| 103 -
2 files changed, 105 insertions(+), 1 deletion(-)
diff --git a/include
support of time namespaces:
1..4
not ok 1 # SKIP Time namespaces are not supported
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/timens/.gitignore | 1 +
tools/testing/selftests/timens/Makefile | 4
: monotonic cycles: 145671139
ok 2 host: clock: boottime cycles: 146958357
not ok 3 # SKIP Time namespaces are not supported
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/timens/.gitignore | 2
# SKIP Time namespaces are not supported
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/timens/.gitignore | 1 +
tools/testing/selftests/timens/Makefile | 2 +-
tools/testing/selftests/timens/exec.c | 94
not ok 1 # SKIP Time namespaces are not supported
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/timens/.gitignore | 1 +
tools/testing/selftests/timens/Makefile | 2 +-
tools/testing/selftests/timens/procfs.c | 144
argument.
As a preparation, make hrtimer_nanosleep() accept a clock value in ktime
instead of timespec64.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
include/linux/hrtimer.h| 2 +-
kernel/time/hrtimer.c | 8
kernel/time
-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
include/linux/posix-timers.h | 3 +++
kernel/time/alarmtimer.c | 8 ++--
kernel/time/posix-timers.c | 4 ++--
3 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/include/linux/posix-timers.h
From: Andrei Vagin
The helper subtracts namespace's clock offset from the given time
and checks that the result is in [0, KTIME_MAX].
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
include/linux/time_namespace.h | 14 +
kernel/time
From: Andrei Vagin
clock_nanosleep() accepts absolute values of expiration time when
TIMER_ABSTIME flag is set. This absolute value is inside the task's
time namespace, and has to be converted to the host's time.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off
-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 6 +++---
kernel/time/posix-timers.c | 16
2 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 8523df726fee..62b06cfa710d
From: Andrei Vagin
API to set time namespace offsets for children processes, i.e.:
echo "clockid off_ses off_nsec" > /proc/self/timens_offsets
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
fs/proc/base.c
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
fs/proc/uptime.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/proc/uptime.c b/fs/proc/uptime.c
index a4c2791ab70b..5a1b228964fb 100644
--- a/fs/proc/uptime.c
+++ b/fs/proc/uptime.c
@@ -5,6
per for VDSO code to get the
code-relative position of VVARs on that special page.
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/Kconfig | 1 +
arch/x86/entry/vdso/vdso-layout.lds.S| 11 +--
arch/x8
adjusted. Further changes complete time namespace virtualisation
with vDSO support.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 1 +
kernel/time/posix-stubs.c | 3 +++
kernel/time/posix-timers.c | 5 +
3 files changed
namespaces:
1..10
not ok 1 # SKIP Time namespaces are not supported
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/timens/.gitignore | 1 +
tools/testing/selftests/timens
If a task belongs to a time namespace then the VVAR page which contains
the system wide VDSO data is replaced with a namespace specific page
which has the same layout as the VVAR page.
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/entry
() callback into get_ktime() as a preparation for introducing
get_timespec().
Suggested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 34 +-
1 file changed, 17 insertions
the time in ktime_t format, rather than in (struct timespec).
Rename the clock_get() callback to clock_get_timespec() as a preparation
for introducing clock_get_ktime().
Suggested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
00.9| 102 | 112
vdsotest results:
https://gist.github.com/avagin/f290afb8b721ae0522a561d585f34de0
The numbers gathered on Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz.
Cc: Adrian Reber
Cc: Andrei Vagin
Cc: Andy Lutomirski
Cc: Arnd Bergmann
Cc: Christian Brauner
Cc: Cyrill Gorcuno
/Time_namespace
Link: https://lists.openvz.org/pipermail/criu/2018-June/041504.html
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
MAINTAINERS| 2 +
fs/proc/namespaces.c | 4 +
include/linux/nsproxy.h| 2
On 9/19/19 3:05 PM, Cyrill Gorcunov wrote:
[..]
>> diff --git a/fs/select.c b/fs/select.c
>> index 12cdefd3be2d..2477c202631e 100644
>> --- a/fs/select.c
>> +++ b/fs/select.c
>> @@ -51,15 +51,14 @@
>>
>> static long __estimate_accuracy(ktime_t slack)
>> {
>> -int divfactor = 1000;
>> -
>>
On 9/9/19 2:07 PM, David Laight wrote:
> From: Dmitry Safonov
>> Sent: 09 September 2019 11:24
>>
>> All preparations have been done - now poll() can set u64 timeout in
>> restart_block. It allows to do the next step - unifying all timeouts in
>> restart_block
Hi Cyrill,
On Mon, 9 Sep 2019 at 12:18, Cyrill Gorcunov wrote:
> Compiler precompute constants so it doesn't do division here.
> But I didn't read the series yet so I might be missing
> something obvious.
Heh, like a division is in ktime_divns()?
Thanks,
Dmitry
not only a "hack", but also it's done every
time poll() syscall is restarted. After conversion it'll be removed.
While at it, rename parameters "slack" and "timeout" which describe
their purpose better.
Signed-off-by: Dmitry Safonov
---
fs/select.c | 33 +++
surprises.
Also, add a comment for any new restart_block user.
Signed-off-by: Dmitry Safonov
---
include/linux/restart_block.h | 4
kernel/time/hrtimer.c | 8 +---
kernel/time/posix-cpu-timers.c | 6 +++---
kernel/time/posix-stubs.c | 8 +---
kernel/time/posix
difficulties of designing new ptrace
operation on Containers Microconference at Plumbers [with a hope to
find the sensible solution].
Cc: Adrian Reber
Cc: Alexander Viro
Cc: Andrei Vagin
Cc: Andy Lutomirski
Cc: Cyrill Gorcunov
Cc: Dmitry Safonov <0x7f454...@gmail.com>
Cc: Ingo Molnar
Cc
for storing ktime_t inside restart_block.
Signed-off-by: Dmitry Safonov
---
fs/select.c | 47 +++
1 file changed, 23 insertions(+), 24 deletions(-)
diff --git a/fs/select.c b/fs/select.c
index 262300e58370..4af88feaa2fe 100644
--- a/fs/select.c
+++ b/fs
to introduce an API for ptrace() to get
a timeout from restart_block.
Signed-off-by: Dmitry Safonov
---
fs/eventpoll.c | 4 ++--
fs/select.c | 38 --
include/linux/poll.h | 2 +-
3 files changed, 15 insertions(+), 29 deletions(-)
diff --git a/fs
Shift on s64 is faster than division, use it instead.
As the result of the patch there is a hardly user-visible effect:
poll(), select(), etc syscalls will be a bit more precise on ~2.3%
than before because 1000 != 1024 :)
Signed-off-by: Dmitry Safonov
---
fs/select.c | 9 -
1 file
In order to provide a unified API to get the leftover of timeout,
the timeout for different users of restart_block can be joined.
All preparations done, so move timeout out of union and convert
the users.
Signed-off-by: Dmitry Safonov
---
fs/select.c| 10 +-
include
isters..
Signed-off-by: Dmitry Safonov
---
fs/select.c | 94 ++---
1 file changed, 32 insertions(+), 62 deletions(-)
diff --git a/fs/select.c b/fs/select.c
index 458f2a944318..262300e58370 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -1056,54 +1056,5
All preparations have been done - now poll() can set u64 timeout in
restart_block. It allows to do the next step - unifying all timeouts in
restart_block and provide ptrace() API to read it.
Signed-off-by: Dmitry Safonov
---
fs/select.c | 27
Not used since introduction in commit 52400ba94675 ("futex: add
requeue_pi functionality").
The result union stays the same size, so nothing saved in task_struct,
but still one __user pointer less to keep.
Signed-off-by: Dmitry Safonov
---
include/linux/restart_block.h | 1 -
1 file
-Cc my old @virtuozzo email.
Previously it just ignored emails and now sends those ugly html replies.
Sorry about that - I've updated .mailmap now.
On 8/27/19 6:03 PM, Dmitry Safonov wrote:
> Hi Oleg,
>
> On 8/27/19 3:00 PM, Oleg Nesterov wrote:
> [..]
>> But to remind, there
I don't work for Virtuozzo or Samsung anymore and I've noticed that
they have started sending annoying html email-replies.
And I prioritize my personal emails over work email box, so while at
it add an entry for Arista too - so I can reply faster when needed.
Signed-off-by: Dmitry Safonov
Hi Oleg,
On 8/27/19 3:00 PM, Oleg Nesterov wrote:
[..]
> But to remind, there is another problem with in_ia32_syscall() && uprobes.
>
> get_unmapped_area() paths use in_ia32_syscall() and this is wrong in case
> when the caller is xol_add_vma(), in this case TS_COMPAT won't be set.>
> Usually
Hi Thomas,
On 8/18/19 5:21 PM, Thomas Gleixner wrote:
[..]
> I'm happy to review well written stuff which makes progress and takes
> review comments into account or the submitter discusses them for
> resolution.
Thanks again for both your and Andy time!
[..]
> Coming back to Andy's idea. Create
Hi Andy, Thomas,
thank you very much for your time and the reviews, appreciate that.
On 8/16/19 9:10 PM, Thomas Gleixner wrote:
> On Fri, 16 Aug 2019, Andy Lutomirski wrote:
[..]
>> I'm unconvinced that any of this magic is wise. I think you should make a
>> special timens vvar page that causes
Hi Thomas,
On 8/15/19 8:21 PM, Thomas Gleixner wrote:
> On Thu, 15 Aug 2019, Dmitry Safonov wrote:
>> ---
>> arch/Kconfig | 5 +++
>> arch/x86/Kconfig | 1 +
>> arch/x86/entry/vdso/vdso-layout.lds.S | 9 -
>&
-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 6 +++---
kernel/time/posix-timers.c | 16
2 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index b5f3779eae57..995dd5aa68f0
/Time_namespace
Link: https://lists.openvz.org/pipermail/criu/2018-June/041504.html
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
MAINTAINERS| 2 +
fs/proc/namespaces.c | 4 +
include/linux/nsproxy.h| 2
adjusted. Further changes complete time namespace virtualisation
with vDSO support.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time/alarmtimer.c | 1 +
kernel/time/posix-stubs.c | 3 +++
kernel/time/posix-timers.c | 5 +
3 files changed
namespace
of the current process.
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
MAINTAINERS| 1 +
include/linux/time_namespace.h | 18 ++
include/linux/timens_offsets.h | 10 ++
kernel/time_namespace.c
From: Andrei Vagin
Now, when the clock_get_ktime() callback exists, the suboptimal
timespec64-based conversion can be removed from common_timer_get().
Suggested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel/time
the time in ktime_t format, rather than in (struct timespec).
Rename clock_get() callback into clock_get_timespec() as a preparation
for introducing clock_get_ktime().
Suggested-by: Thomas Gleixner
Signed-off-by: Andrei Vagin
Co-developed-by: Dmitry Safonov
Signed-off-by: Dmitry Safonov
---
kernel
- this patch can be easily reverted.
Co-developed-by: Andrei Vagin
Signed-off-by: Andrei Vagin
Signed-off-by: Dmitry Safonov
---
arch/x86/entry/vdso/vma.c | 13 +
1 file changed, 13 insertions(+)
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 349a61d8bf34
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