This helper is used stream sockets yet.
All is simple: if non-NULL struct path was passed to unix_find_other(), then
vfs_path_lookup() is called instead of kern_path().
Signed-off-by: Stanislav Kinsbursky skinsbur...@parallels.com
---
include/net/af_unix.h |2 ++
net/unix/af_unix.c| 25
Today, there is a problem in connecting of local SUNRPC thansports. These
transports uses UNIX sockets and connection itself is done by rpciod
workqueue.
But UNIX sockets lookup is done in context of process file system root. I.e.
all local thunsports are connecting in rpciod context.
This works
Today, there is a problem in connecting of local SUNRPC thansports. These
transports uses UNIX sockets and connection itself is done by rpciod
workqueue.
But UNIX sockets lookup is done in context of process file system root. I.e.
all local thunsports are connecting in rpciod context.
This works
v3:
1) Copy messages to user-space under spinlock was replaced by allocation of
dummy message before queue lock and then copy of desired message to the dummy
one instead of unlinking it from queue list.
I.e. the message queue copy logic was changed: messages can be retrived one by
one (instead of
This is a cleanup patch. The assignment is redundant.
---
ipc/msg.c |1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/ipc/msg.c b/ipc/msg.c
index 7385de2..f3bfbb8 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -787,7 +787,6 @@ long do_msgrcv(int msqid, long *pmtype, void __user
This patch introduces new IPC resource get request flag IPC_PRESET, which
should be interpreted as a request to try to allocate IPC slot with number,
starting from value resented by key. IOW, kernel will try
allocate new segment in specified slot. If slot is not emply, them -EEXIST
returned.
This patch introduces existent segment key changing infrastructure.
New function ipc_update_key() can be used change segment key, cuid, cgid
values. It checks for that new key is not used (except IPC_PRIVATE) prior to
set it on existent.
To make this possible, added copying of this fields from
New SHM_SET command will be interpreted exactly as IPC_SET, but also will
update key, cuid and cgid values. IOW, it allows to change existent key value.
The fact, that key is not used is checked before update. Otherwise -EEXIST is
returned.
Signed-off-by: Stanislav Kinsbursky
New SEM_SET command will be interpreted exactly as IPC_SET, but also will
update key, cuid and cgid values. IOW, it allows to change existent key value.
The fact, that key is not used is checked before update. Otherwise -EEXIST is
returned.
Signed-off-by: Stanislav Kinsbursky
This patch moves all message related manipulation into one function msg_fill().
Actually, two functions because of the compat one.
Signed-off-by: Stanislav Kinsbursky skinsbur...@parallels.com
Signed-off-by: Cyrill Gorcunov gorcu...@openvz.org
Conflicts:
arch/tile/kernel/compat.c
New MSG_SET command will be interpreted exactly as IPC_SET, but also will
update key, cuid and cgid values. IOW, it allows to change existent key value.
The fact, that key is not used is checked before update. Otherwise -EEXIST is
returned.
Signed-off-by: Stanislav Kinsbursky
This patch is required for checkpoint/restore in userspace.
IOW, c/r requires some way to get all pending IPC messages without deleting
them from the queue (checkpoint can fail and in this case tasks will be resumed,
so queue have to be valid).
To achive this, new operation flag MSG_COPY for
New MSG_SET_COPY allows to set specified queue copy counter to passed value.
Passed struct msqid_ds *buf interpreted as pointer to unsigned int in this
case.
---
include/linux/msg.h |1 +
ipc/compat.c|3 +++
ipc/msg.c | 18 ++
3 files changed, 22
This test is a part of CRIU development test suit.
---
tools/testing/selftests/ipc/msgque.c | 151 ++
1 files changed, 151 insertions(+), 0 deletions(-)
create mode 100644 tools/testing/selftests/ipc/msgque.c
diff --git a/tools/testing/selftests/ipc/msgque.c
On Thu 09-08-12 17:01:09, Glauber Costa wrote:
From: Suleiman Souhlal ssouh...@freebsd.org
We currently have a percpu stock cache scheme that charges one page at a
time from memcg-res, the user counter. When the kernel memory
controller comes into play, we'll need to charge more than that.
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
@@ -2317,18 +2318,18 @@ static int mem_cgroup_do_charge(struct mem_cgroup
*memcg, gfp_t gfp_mask,
} else
mem_over_limit = mem_cgroup_from_res_counter(fail_res, res);
/*
- * nr_pages can be either a huge page
On Thu 09-08-12 17:01:11, Glauber Costa wrote:
This is just a cleanup patch for clarity of expression. In earlier
submissions, people asked it to be in a separate patch, so here it is.
[ v2: use named enum as type throughout the file as well ]
Signed-off-by: Glauber Costa
(2012/08/11 0:42), Michal Hocko wrote:
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
@@ -2317,18 +2318,18 @@ static int mem_cgroup_do_charge(struct mem_cgroup
*memcg, gfp_t gfp_mask,
} else
mem_over_limit = mem_cgroup_from_res_counter(fail_res, res);
/*
-
(2012/08/09 22:01), Glauber Costa wrote:
This patch adds the basic infrastructure for the accounting of the slab
caches. To control that, the following files are created:
* memory.kmem.usage_in_bytes
* memory.kmem.limit_in_bytes
* memory.kmem.failcnt
*
(2012/08/09 22:01), Glauber Costa wrote:
This flag is used to indicate to the callees that this allocation is a
kernel allocation in process context, and should be accounted to
current's memcg. It takes numerical place of the of the recently removed
__GFP_NO_KSWAPD.
Signed-off-by: Glauber
(2012/08/09 22:01), Glauber Costa wrote:
This patch introduces infrastructure for tracking kernel memory pages to
a given memcg. This will happen whenever the caller includes the flag
__GFP_KMEMCG flag, and the task belong to a memcg other than the root.
In memcontrol.h those functions are
On Sat 11-08-12 01:49:25, KAMEZAWA Hiroyuki wrote:
(2012/08/11 0:42), Michal Hocko wrote:
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
@@ -2317,18 +2318,18 @@ static int mem_cgroup_do_charge(struct mem_cgroup
*memcg, gfp_t gfp_mask,
} else
mem_over_limit =
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
For now retry up to COSTLY_ORDER (as page_alloc.c does) and make sure
not to do it if __GFP_NORETRY.
Who is using __GFP_NORETRY for user backed memory (except for hugetlb
which has its own controller)?
--
Michal Hocko
SUSE Labs
(2012/08/09 22:01), Glauber Costa wrote:
When a process tries to allocate a page with the __GFP_KMEMCG flag, the
page allocator will call the corresponding memcg functions to validate
the allocation. Tasks in the root memcg can always proceed.
To avoid adding markers to the page - and a kmem
On Thu, Aug 09 2012, Glauber Costa wrote:
When a process tries to allocate a page with the __GFP_KMEMCG flag, the
page allocator will call the corresponding memcg functions to validate
the allocation. Tasks in the root memcg can always proceed.
To avoid adding markers to the page - and a
(2012/08/09 22:01), Glauber Costa wrote:
The current memcg slab cache management fails to present satisfatory
hierarchical behavior in the following scenario:
- /cgroups/memory/A/B/C
* kmem limit set at A,
* A and B have no tasks,
* span a new task in in C.
Because kmem_accounted is a
(2012/08/09 22:01), Glauber Costa wrote:
Because those architectures will draw their stacks directly from the
page allocator, rather than the slab cache, we can directly pass
__GFP_KMEMCG flag, and issue the corresponding free_pages.
This code path is taken when the architecture doesn't
(2012/08/11 2:28), Michal Hocko wrote:
On Sat 11-08-12 01:49:25, KAMEZAWA Hiroyuki wrote:
(2012/08/11 0:42), Michal Hocko wrote:
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
@@ -2317,18 +2318,18 @@ static int mem_cgroup_do_charge(struct mem_cgroup
*memcg, gfp_t gfp_mask,
}
On Fri, Aug 10, 2012 at 04:57:30PM +0400, Stanislav Kinsbursky wrote:
This helper is used stream sockets yet.
All is simple: if non-NULL struct path was passed to unix_find_other(), then
vfs_path_lookup() is called instead of kern_path().
I'm having some trouble parsing the changelog. Maybe
On 08/10/2012 05:57 AM, Stanislav Kinsbursky wrote:
Today, there is a problem in connecting of local SUNRPC thansports. These
transports uses UNIX sockets and connection itself is done by rpciod
workqueue.
But UNIX sockets lookup is done in context of process file system root. I.e.
all local
On that whole subject...
Do we need a Unix domain socket equivalent to openat()?
I don't think so. The name is just a file system indexing trick, it's not
really the socket proper. It's little more than ascii string with
permissions attached - indeed we also support an abstract name space
On 08/10/2012 11:26 AM, Alan Cox wrote:
On that whole subject...
Do we need a Unix domain socket equivalent to openat()?
I don't think so. The name is just a file system indexing trick, it's not
really the socket proper. It's little more than ascii string with
permissions attached - indeed
AF_UNIX between roots raises some interesting semantic questions when
you begin passing file descriptors down them as well.
Why is that? A file descriptor carries all that information with it...
Things like fchdir(). It's not a machine breaking problem but for
containers as opposed to
10.08.2012 22:10, J. Bruce Fields пишет:
On Fri, Aug 10, 2012 at 04:57:30PM +0400, Stanislav Kinsbursky wrote:
This helper is used stream sockets yet.
All is simple: if non-NULL struct path was passed to unix_find_other(), then
vfs_path_lookup() is called instead of kern_path().
I'm having
On 08/10/2012 11:40 AM, Alan Cox wrote:
Agreed on open() for sockets.. the lack of open is a Berklix derived
pecularity of the interface. It would equally be useful to be able to
open /dev/socket/ipv4/1.2.3.4/1135 and the like for scripts and stuff
That needs VFS changes however so you can
10.08.2012 22:15, H. Peter Anvin пишет:
On 08/10/2012 05:57 AM, Stanislav Kinsbursky wrote:
Today, there is a problem in connecting of local SUNRPC thansports. These
transports uses UNIX sockets and connection itself is done by rpciod
workqueue.
But UNIX sockets lookup is done in context of
On Fri 10-08-12 19:30:00, Michal Hocko wrote:
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
[...]
For now retry up to COSTLY_ORDER (as page_alloc.c does) and make sure
not to do it if __GFP_NORETRY.
Who is using __GFP_NORETRY for user backed memory (except for hugetlb
which has its own
On Thu 09-08-12 17:01:10, Glauber Costa wrote:
From: Suleiman Souhlal ssouh...@freebsd.org
mem_cgroup_do_charge() was written before kmem accounting, and expects
three cases: being called for 1 page, being called for a stock of 32
pages, or being called for a hugepage. If we call for 2 or 3
On Fri, Aug 10, 2012 at 07:26:28PM +0100, Alan Cox wrote:
On that whole subject...
Do we need a Unix domain socket equivalent to openat()?
I don't think so. The name is just a file system indexing trick, it's not
really the socket proper. It's little more than ascii string with
On Fri, 10 Aug 2012 15:11:50 -0400
J. Bruce Fields bfie...@fieldses.org wrote:
On Fri, Aug 10, 2012 at 07:26:28PM +0100, Alan Cox wrote:
On that whole subject...
Do we need a Unix domain socket equivalent to openat()?
I don't think so. The name is just a file system indexing
On 08/10/2012 12:28 PM, Alan Cox wrote:
Explicitly for Linux yes - this is not generally true of the AF_UNIX
socket domain and even the permissions aspect isn't guaranteed to be
supported on some BSD environments !
Yes, but let's worry about what the Linux behavior should be.
The name is
On Thu, Aug 09 2012, Glauber Costa wrote:
This patch introduces infrastructure for tracking kernel memory pages to
a given memcg. This will happen whenever the caller includes the flag
__GFP_KMEMCG flag, and the task belong to a memcg other than the root.
In memcontrol.h those functions are
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