Hi.
I'm working on the checkpoint-restore project (http://criu.org), on
realisation of posix-timers. To compleatly checkpoint and restore these
timers we need to know which clock they are using. So I d'like to add
this information to existing syscall which shows posix-timers info.
Pavel
Expand information about posix-timers in /proc/pid/timers by adding
info about clock, with which the timer was created. I.e. in the forth
line of timer info after notify: line go ClockID: clock_id.
Signed-off-by: Pavel Tikhomirov snor...@gmail.com
---
fs/proc/base.c |1 +
1 file changed, 1
I have very similar problem with SAS2X28, please take a look on a bug
report here https://bugzilla.kernel.org/show_bug.cgi?id=108771
Thanks, Pavel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info
oc/sys/net/netfilter/nf_log/0
nfnetlink_log
echo NONE > /proc/sys/net/netfilter/nf_log/0
cat /proc/sys/net/netfilter/nf_log/0
NONE
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
net/netfilter/nf_log.c | 9 -
1 file changed, 4 insertions(+), 5 deletions(-)
dif
oc/sys/net/netfilter/nf_log/0
nfnetlink_log
echo NONE > /proc/sys/net/netfilter/nf_log/0
cat /proc/sys/net/netfilter/nf_log/0
NONE
v2: add missed error check for proc_dostring
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
net/netfilter/nf_log.c | 11 ++-
1 file
Add to cc Lennart Poettering <lenn...@poettering.net>
On 01/23/2017 02:55 PM, Oleg Nesterov wrote:
On 01/22, Pavel Tikhomirov wrote:
Hmm. could you explain how this change helps CRIU? I mean, why
restorer can't do prctl(CHILD_SUBREAPER) before the first fork?
Imagine we have thes
On 01/30/2017 03:51 PM, Oleg Nesterov wrote:
On 01/27, Pavel Tikhomirov wrote:
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1725,6 +1725,8 @@ struct task_struct {
struct signal_struct *signal;
struct sighand_struct *sighand;
+ struct list_head
please drop it, errors in commit message
On 01/30/2017 05:48 PM, Pavel Tikhomirov wrote:
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c | 42 +++---
kernel/sys.c | 22
rov <o...@redhat.com>
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
include/linux/sched.h | 3 +++
kernel/fork.c | 32
2 files changed, 35 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ad3ec
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c | 42 +++---
kernel/sys.c | 22
rov <o...@redhat.com>
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
include/linux/sched.h | 3 +++
kernel/fork.c | 32
2 files changed, 35 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ad3ec
3: remove csr_descendant leftover, change current to real_parent
in has_child_subreaper inheritance
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
kernel/fork.c | 10 +++---
kernel/sys.c | 22 ++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/
leftover, change current to real_parent
in has_child_subreaper inheritance
v4: small commit message fix
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
kernel/fork.c | 10 +++---
kernel/sys.c | 22 ++
2 files changed, 29 insertions(+), 3 deletions(-)
diff
On 01/28/2017 01:47 AM, Michael Kerrisk (man-pages) wrote:
Hello Pavel,
On 27 January 2017 at 23:11, Pavel Tikhomirov <ptikhomi...@virtuozzo.com> wrote:
old semantics was non deterministic and worked differently
depending on the external factors, but nothing changes if
process firs
On 01/20/2017 09:14 PM, Oleg Nesterov wrote:
On 01/19, Pavel Tikhomirov wrote:
Having these two
differently behaving groups can lead to confusion. Also it is
a problem for CRIU, as when we restore process tree we need to
somehow determine which descendants belong to which group and
much
Sorry I had some problem with mail-agent, resend to be on the safe side.
On 01/20/2017 09:14 PM, Oleg Nesterov wrote:
On 01/19, Pavel Tikhomirov wrote:
Having these two
differently behaving groups can lead to confusion. Also it is
a problem for CRIU, as when we restore process tree we need
will send documentation change proposal in reply to these letter
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 5 +
kernel/fork.c | 42
rov <o...@redhat.com>
Reviewed-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
include/linux/sched.h | 3 +++
kernel/fork.c | 32
2 files changed, 35 insertions(+)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index ad3ec
s subtree is in different
pidns from us(original child-subreaper) and processes from other pidns
will never reparent to us.
So we can skip their(a,b) subtree from walk.
v2: switch to walk_process_tree() general helper, move
has_child_subreaper inheritance
Signed-off-by: Pavel Tikhomirov
old semantics was non deterministic and worked differently
depending on the external factors, but nothing changes if
process first sets itself subreaper and only after forks
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
man2/prctl.2 | 24 +---
1 file c
Will include it in patch-set with documentation fix. Thanks Oleg!
Reviewed-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
On 01/23/2017 02:57 PM, Oleg Nesterov wrote:
Add the new helper to walk the process tree, the next patch adds a user.
Note that it visits the group leader
ady has has_child_subreaper flag all his subtree
has it too already.
b) When some descendant is child_reaper, it's subtree is in different
pidns from us(original child-subreaper) and processes from other pidns
will never reparent to us.
So we can skip their(a,b) subtree from walk.
Signed-off-by: Pa
umentation we have "tcp_notsent_lowat - UNSIGNED INTEGER"
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
net/ipv4/sysctl_net_ipv4.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 80bc
umentation we have "tcp_notsent_lowat - UNSIGNED INTEGER"
v2: simplify to just proc_douintvec
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
net/ipv4/sysctl_net_ipv4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ip
Hi. Please tell if there is something I can do to help the patch get
processed? It is on the list without reply for almost a month.
On 09/05/2017 03:54 PM, Pavel Tikhomirov wrote:
We have a problem on several our nodes with scsi EH. Imagine such an
order of execution of two threads:
CPU1
lock, so at the time of busy==failed
we will trigger wakeup in at least one thread. (Thats why putting
recovery and failed checks under lock)
Signed-off-by: Pavel Tikhomirov <ptikhomi...@virtuozzo.com>
---
drivers/scsi/scsi_lib.c | 21 +
1 file changed, 17 insertions(
Thanks
Stuart
On 11/21/2017 2:09 AM, Pavel Tikhomirov wrote:
My patch should also fix your issue too, please see explanation in reply to
your patch. Do your testing show that it doesn't?
Thanks, Pavel.
On 11/21/2017 09:10 AM, Stuart Hayes wrote:
Pavel,
It turns out that the error handler on our s
JFYI these patch is in Virtuozzo7 kernel from September, and we have no
issues found with it until now by out testing, and initial problem does
not reproduce for 2.5 months.
On 11/20/2017 10:11 PM, Stuart Hayes wrote:
When a command is added to the host's error handler command queue, there is a
chance that the error handler will not be woken up. This can happen when one CPU
is running scsi_eh_scmd_add() at the same time as another CPU is running
or less successfully ran for many days.
Thanks,
Stuart
On 11/9/2017 8:54 AM, Pavel Tikhomirov wrote:
Are there any issues with this patch
(https://patchwork.kernel.org/patch/9938919/) that Pavel Tikhomirov submitted
back in September? I am willing to help if there's anything I can do to help
> Are there any issues with this patch
(https://patchwork.kernel.org/patch/9938919/) that Pavel Tikhomirov
submitted back in September? I am willing to help if there's anything I
can do to help get it accepted.
Hi, Stuart, I asked James Bottomley about the patch status offlist and
it se
ping
On 09/05/2017 03:54 PM, Pavel Tikhomirov wrote:
We have a problem on several our nodes with scsi EH. Imagine such an
order of execution of two threads:
CPU1 scsi_eh_scmd_add CPU2 scsi_host_queue_ready
/* shost->host_busy == 1 initi
80765597bc58 ("tracing: Rewrite filter logic to be simpler and faster")
Signed-off-by: Pavel Tikhomirov
---
kernel/trace/trace_events_filter.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace_events_filter.c
b/kernel/trace/trace_events_filt
che")
To: Andrew Morton
Cc: Johannes Weiner
Cc: Mel Gorman
Cc: Jan Kara
Cc: Matthew Wilcox
Cc: Andi Kleen
Cc: linux...@kvack.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Vasily Averin
Reviewed-by: Andrey Ryabinin
Signed-off-by: Pavel Tikhomirov
---
mm/truncate.c | 4 ++--
1 file change
es in page cache")
To: Andrew Morton
Cc: Johannes Weiner
Cc: Mel Gorman
Cc: Jan Kara
Cc: Matthew Wilcox
Cc: Andi Kleen
Cc: linux...@kvack.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Vasily Averin
Reviewed-by: Andrey Ryabinin
Reviewed-by: Jan Kara
Signed-off-by: Pavel Tikhomirov
-
Please see comment to filelayout_pg_test for reference.
To: Trond Myklebust
Cc: Anna Schumaker
Cc: linux-...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
---
fs/nfs/pagelist.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfs
Hi.
I'm working on the checkpoint-restore project (http://criu.org), on
realisation of posix-timers. To compleatly checkpoint and restore these
timers we need to know which clock they are using. So I d'like to add
this information to existing syscall which shows posix-timers info.
Pavel
Expand information about posix-timers in /proc//timers by adding
info about clock, with which the timer was created. I.e. in the forth
line of timer info after "notify:" line go "ClockID: ".
Signed-off-by: Pavel Tikhomirov
---
fs/proc/base.c |1 +
1 file changed, 1 inse
Hi. Please tell if there is something I can do to help the patch get
processed? It is on the list without reply for almost a month.
On 09/05/2017 03:54 PM, Pavel Tikhomirov wrote:
We have a problem on several our nodes with scsi EH. Imagine such an
order of execution of two threads:
CPU1
> Are there any issues with this patch
(https://patchwork.kernel.org/patch/9938919/) that Pavel Tikhomirov
submitted back in September? I am willing to help if there's anything I
can do to help get it accepted.
Hi, Stuart, I asked James Bottomley about the patch status offlist and
it se
On 11/20/2017 10:11 PM, Stuart Hayes wrote:
When a command is added to the host's error handler command queue, there is a
chance that the error handler will not be woken up. This can happen when one CPU
is running scsi_eh_scmd_add() at the same time as another CPU is running
or less successfully ran for many days.
Thanks,
Stuart
On 11/9/2017 8:54 AM, Pavel Tikhomirov wrote:
Are there any issues with this patch
(https://patchwork.kernel.org/patch/9938919/) that Pavel Tikhomirov submitted
back in September? I am willing to help if there's anything I can do to help
JFYI these patch is in Virtuozzo7 kernel from September, and we have no
issues found with it until now by out testing, and initial problem does
not reproduce for 2.5 months.
lock, so at the time of busy==failed
we will trigger wakeup in at least one thread. (Thats why putting
recovery and failed checks under lock)
Signed-off-by: Pavel Tikhomirov
---
drivers/scsi/scsi_lib.c | 21 +
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a
, Pavel Tikhomirov wrote:
My patch should also fix your issue too, please see explanation in reply to
your patch. Do your testing show that it doesn't?
Thanks, Pavel.
On 11/21/2017 09:10 AM, Stuart Hayes wrote:
Pavel,
It turns out that the error handler on our systems was not getting woken up
On 8/4/20 8:43 AM, Andrei Vagin wrote:
On Thu, Jul 30, 2020 at 06:01:20PM +0300, Kirill Tkhai wrote:
On 30.07.2020 17:34, Eric W. Biederman wrote:
Kirill Tkhai writes:
Currently, there is no a way to list or iterate all or subset of namespaces
in the system. Some namespaces are exposed
mount_setattr() can be expected to grow over time and is designed with
extensibility in mind. It follows the extensible syscall pattern we have
used with other syscalls such as openat2(), clone3(),
sched_{set,get}attr(), and others.
The set of mount options is passed in the uapi struct
In the "out" label we only iput old/new_ea_inode-s, in all these places
these variables are always NULL so there is no point in goto to "out".
Signed-off-by: Pavel Tikhomirov
---
fs/ext4/xattr.c | 9 +++--
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/
On 9/23/20 7:36 PM, Amir Goldstein wrote:
@@ -414,7 +415,7 @@ static int ovl_check_origin(struct ovl_fs *ofs, struct
dentry *upperdentry,
* Return 0 on match, -ESTALE on mismatch, < 0 on error.
*/
static int ovl_verify_fh(struct dentry *dentry, const char *name,
-
On 9/23/20 7:09 PM, Amir Goldstein wrote:
On Wed, Sep 23, 2020 at 6:23 PM Pavel Tikhomirov
wrote:
This relaxes uuid checks for overlay index feature. It is only possible
in case there is only one filesystem for all the work/upper/lower
directories and bare file handles from this backing
check fallback, add a note
to docs.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
Pavel Tikhomirov (2):
ovl: propagate ovl_fs to ovl_decode_real_fh and ovl_encode_real_fh
ovl: introduce n
This will be used in next patch to be able to change uuid checks and
add uuid nullification based on ofs->config.index for a new "uuid=off"
mode.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-
skip
v3: rebase to overlayfs-next, replace uuid with null in file handles,
split ovl_fs propagation to function arguments to separate patch, add
separate bool "uuid=on/off" option, move numfs check up, add doc note.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linu
This will be used in next patch to be able to change uuid checks and
add uuid nullification based on ofs->config.index for a new "uuid=off"
mode.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-
check fallback, add a note
to docs.
Changes in v4: get rid of double negatives, remove nouuid leftower
comment, fix missprint in kernel config name.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomiro
klos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
---
v2: in v1 I missed actual uuid check skip
v3: rebase to overlayfs-next, replace uuid with null in file handles,
split ovl_fs propagation to function arguments to separate patch, ad
:
On Thu, Sep 24, 2020 at 7:38 PM Pavel Tikhomirov
wrote:
This replaces uuid with null in overelayfs file handles and thus relaxes
uuid checks for overlay index feature. It is only possible in case there
is only one filesystem for all the work/upper/lower directories and bare
file handles from
Please drop, I accidentally missed several hunks...
On 9/23/20 3:50 PM, Pavel Tikhomirov wrote:
dd if=/dev/zero of=loopbackfile.img bs=100M count=10
losetup -fP loopbackfile.img
losetup -a
#/dev/loop0: [64768]:35 (/loop-test/loopbackfile.img)
mkfs.ext4 /root/loopbackfile.img
mkdir loop-mp
filesystem, overlay is not
mounting any more. In Virtuozzo we copy container disks (ploops) when
crate the copy of container and we require fs uuid to be uniq for a new
container.
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
n v1 I missed actual uuid check skip - add it
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
---
fs/overlayfs/Kconfig | 16 +++
fs/overlayfs/export.c| 6 ++--
fs/overla
On 9/25/20 7:42 PM, Amir Goldstein wrote:
Apart from some typos, looks good to me.
Amir, Thanks a lot for your review!
> you should wait for more feedback from others
Sure, will wait.
--
Best regards, Tikhomirov Pavel
Software Developer, Virtuozzo.
On 10/6/20 6:13 PM, Miklos Szeredi wrote:
On Fri, Sep 25, 2020 at 10:35 AM Pavel Tikhomirov
wrote:
Note: In our (Virtuozzo) use case users inside a container can create
"regular" overlayfs mounts without any "index=" option, but we still
want to migrate this containers
: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
Pavel Tikhomirov (2):
ovl: propagate ovl_fs to ovl_decode_real_fh and ovl_encode_real_fh
ovl: introduce new "uuid=off" o
mir Goldstein
Signed-off-by: Pavel Tikhomirov
---
fs/overlayfs/copy_up.c | 22 --
fs/overlayfs/export.c| 10 ++
fs/overlayfs/namei.c | 19 ++-
fs/overlayfs/overlayfs.h | 14 --
fs/overlayfs/util.c | 3 ++-
5 files changed,
CC: Amir Goldstein
CC: Vivek Goyal
CC: Miklos Szeredi
CC: linux-unio...@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
---
v2: in v1 I missed actual uuid check skip
v3: rebase to overlayfs-next, replace uuid with null in file handles,
split ovl_fs pro
On 2/3/21 10:32 PM, Cyrill Gorcunov wrote:
On Wed, Feb 03, 2021 at 03:41:56PM +0300, Pavel Tikhomirov wrote:
Currently there is no way to differentiate the file with alive owner
from the file with dead owner but pid of the owner reused. That's why
CRIU can't actually know if it needs to restore
Gorcunov
Cc: Andrei Vagin
Signed-off-by: Pavel Tikhomirov
---
fs/fcntl.c | 19 +--
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 05b36b28f2e8..483ef8861376 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -148,11 +148,15 @@ void f_delo
On 6/5/20 5:35 AM, Amir Goldstein wrote:
On Fri, Jun 5, 2020 at 12:34 AM Alexander Mikhalitsyn
wrote:
Hello,
But overlayfs won't accept these "output only" options as input args,
which is a problem.
Will it be problematic if we simply ignore "lowerdir_mnt_id" and
"upperdir_mnt_id"
ping
On 09/05/2017 03:54 PM, Pavel Tikhomirov wrote:
We have a problem on several our nodes with scsi EH. Imagine such an
order of execution of two threads:
CPU1 scsi_eh_scmd_add CPU2 scsi_host_queue_ready
/* shost->host_busy == 1 initi
108726.367179] CR2: 0074
Fixes: d58431eacb22 ("sunrpc: don't mark uninitialised items as VALID.")
Signed-off-by: Pavel Tikhomirov
---
net/sunrpc/cache.c | 6 --
1 file changed, 6 deletions(-)
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index a349094f6fb7..f740cb51
Hi, all.
Then porting patches from mainstream I've found some strange code:
> commit a2b809672ee6fcb4d5756ea815725b3dbaea654e
> Author: Christoph Hellwig
> Date: Tue Nov 1 07:40:09 2016 -0600
>
> block: replace REQ_NOIDLE with REQ_IDLE
>
> Noidle should be the default for
Add Neil to CC, sorry, had lost it somehow...
On 10/1/19 11:03 AM, Pavel Tikhomirov wrote:
> I was investigating a crash in our Virtuozzo7 kernel which happened in
> in svcauth_unix_set_client. I found out that we access m_client field
> in ip_map structure, which was rece
while
trying to make it's job simpler and easier.
CC: Pavel Tikhomirov CRIU maintainer, who knows everything about namespaces C/R.
Further by not going through the processes it looks like you are
bypassing the existing permission checks. Which has the potential
to allow someone to use
che")
To: Andrew Morton
Cc: Johannes Weiner
Cc: Mel Gorman
Cc: Jan Kara
Cc: Matthew Wilcox
Cc: Andi Kleen
Cc: linux...@kvack.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Vasily Averin
Reviewed-by: Andrey Ryabinin
Signed-off-by: Pavel Tikhomirov
---
mm/truncate.c | 4 ++--
1 file change
es in page cache")
To: Andrew Morton
Cc: Johannes Weiner
Cc: Mel Gorman
Cc: Jan Kara
Cc: Matthew Wilcox
Cc: Andi Kleen
Cc: linux...@kvack.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Vasily Averin
Reviewed-by: Andrey Ryabinin
Reviewed-by: Jan Kara
Signed-off-by: Pavel Tikhomirov
-
Please see comment to filelayout_pg_test for reference.
To: Trond Myklebust
Cc: Anna Schumaker
Cc: linux-...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Pavel Tikhomirov
---
fs/nfs/pagelist.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfs
perror("open");
return 1;
}
iov.iov_base =
iov.iov_len = sizeof(msg)-4;
if (writev(fd, ,1) == -1) {
perror("writev");
return 1;
}
return 0;
}
Signed-off-by: Pavel Tikhomirov
---
drivers/vhost/vhost.c | 8 ++--
1 file changed, 6 insertions(
On 12/13/2018 10:55 PM, Michael S. Tsirkin wrote:
> On Thu, Dec 13, 2018 at 05:53:50PM +0300, Pavel Tikhomirov wrote:
>> We've failed to copy and process vhost_iotlb_msg so let userspace at
>> least know about it. For instance before these patch the code below runs
>> without
80765597bc58 ("tracing: Rewrite filter logic to be simpler and faster")
Signed-off-by: Pavel Tikhomirov
---
kernel/trace/trace_events_filter.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace_events_filter.c
b/kernel/trace/trace_events_filt
ping, looks like the patch was lost
On 8/24/18 3:48 AM, Steven Rostedt wrote:
> On Thu, 23 Aug 2018 13:25:34 +0300
> Pavel Tikhomirov wrote:
>
>> Then tracing syscall exit event it is extremely useful to filter exit
>> codes equal to some negative value, to react on
ady has has_child_subreaper flag all his subtree
has it too already.
b) When some descendant is child_reaper, it's subtree is in different
pidns from us(original child-subreaper) and processes from other pidns
will never reparent to us.
So we can skip their(a,b) subtree from walk.
Signed-off-by: Pa
umentation we have "tcp_notsent_lowat - UNSIGNED INTEGER"
v2: simplify to just proc_douintvec
Signed-off-by: Pavel Tikhomirov
---
net/ipv4/sysctl_net_ipv4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 80bc36b..5
will send documentation change proposal in reply to these letter
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 5 +
kernel/fork.c | 42
From: Oleg Nesterov
Add the new helper to walk the process tree, the next patch adds a user.
Note that it visits the group leaders only, proc_visitor can do
for_each_thread itself or we can trivially extend walk_process_tree() to
do this.
Signed-off-by: Oleg Nesterov
Reviewed-by: Pavel
s subtree is in different
pidns from us(original child-subreaper) and processes from other pidns
will never reparent to us.
So we can skip their(a,b) subtree from walk.
v2: switch to walk_process_tree() general helper, move
has_child_subreaper inheritance
Signed-off-by: Pavel Tikhomirov
---
old semantics was non deterministic and worked differently
depending on the external factors, but nothing changes if
process first sets itself subreaper and only after forks
Signed-off-by: Pavel Tikhomirov
---
man2/prctl.2 | 24 +---
1 file changed, 17 insertions(+), 7
On 01/28/2017 01:47 AM, Michael Kerrisk (man-pages) wrote:
Hello Pavel,
On 27 January 2017 at 23:11, Pavel Tikhomirov wrote:
old semantics was non deterministic and worked differently
depending on the external factors, but nothing changes if
process first sets itself subreaper and only after
On 01/30/2017 03:51 PM, Oleg Nesterov wrote:
On 01/27, Pavel Tikhomirov wrote:
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1725,6 +1725,8 @@ struct task_struct {
struct signal_struct *signal;
struct sighand_struct *sighand;
+ struct list_head
please drop it, errors in commit message
On 01/30/2017 05:48 PM, Pavel Tikhomirov wrote:
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c | 42 +++---
kernel/sys.c | 22
Oleg Nesterov (1):
introduce the walk_process_tree() helper
Pavel Tikhomirov (1):
prctl: propagate has_child_subreaper flag to every descendant
include/linux/sched.h | 3 +++
kernel/fork.c | 42 +++---
kernel/sys.c | 22
From: Oleg Nesterov
Add the new helper to walk the process tree, the next patch adds a user.
Note that it visits the group leaders only, proc_visitor can do
for_each_thread itself or we can trivially extend walk_process_tree() to
do this.
Signed-off-by: Oleg Nesterov
Signed-off-by: Pavel
3: remove csr_descendant leftover, change current to real_parent
in has_child_subreaper inheritance
Signed-off-by: Pavel Tikhomirov
---
kernel/fork.c | 10 +++---
kernel/sys.c | 22 ++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c
inde
From: Oleg Nesterov
Add the new helper to walk the process tree, the next patch adds a user.
Note that it visits the group leaders only, proc_visitor can do
for_each_thread itself or we can trivially extend walk_process_tree() to
do this.
Signed-off-by: Oleg Nesterov
Signed-off-by: Pavel
leftover, change current to real_parent
in has_child_subreaper inheritance
v4: small commit message fix
Signed-off-by: Pavel Tikhomirov
---
kernel/fork.c | 10 +++---
kernel/sys.c | 22 ++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/kernel/fork.c b/kern
umentation we have "tcp_notsent_lowat - UNSIGNED INTEGER"
Signed-off-by: Pavel Tikhomirov
---
net/ipv4/sysctl_net_ipv4.c | 5 -
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 80bc36b..5361373 100644
--- a/net/ipv4
On 01/20/2017 09:14 PM, Oleg Nesterov wrote:
On 01/19, Pavel Tikhomirov wrote:
Having these two
differently behaving groups can lead to confusion. Also it is
a problem for CRIU, as when we restore process tree we need to
somehow determine which descendants belong to which group and
much
Sorry I had some problem with mail-agent, resend to be on the safe side.
On 01/20/2017 09:14 PM, Oleg Nesterov wrote:
On 01/19, Pavel Tikhomirov wrote:
Having these two
differently behaving groups can lead to confusion. Also it is
a problem for CRIU, as when we restore process tree we need
Add to cc Lennart Poettering
On 01/23/2017 02:55 PM, Oleg Nesterov wrote:
On 01/22, Pavel Tikhomirov wrote:
Hmm. could you explain how this change helps CRIU? I mean, why
restorer can't do prctl(CHILD_SUBREAPER) before the first fork?
Imagine we have these tree in pidns:
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