[This is a revision of http://lkml.org/lkml/2009/11/2/442 ]
This patch series implements support for building, loading, and
unloading subsystems as modules, both within and outside the kernel
source tree. It provides an interface cgroup_load_subsys() and
cgroup_unload_subsys() which modular
Make subsys[] able to be dynamically populated to support modular subsystems
From: Ben Blum bb...@andrew.cmu.edu
This patch reworks the way the subsys[] array is used so that subsystems can
register themselves after boot time, and enables the internals of cgroups to
be able to handle when
Add interface between cgroups subsystem management and module loading
From: Ben Blum bb...@andrew.cmu.edu
This patch implements rudimentary module-loading support for cgroups - namely,
a cgroup_load_subsys (similar to cgroup_init_subsys) for use as a module
initcall, and a struct module pointer
Allows the net_cls cgroup subsystem to be compiled as a module
From: Ben Blum bb...@andrew.cmu.edu
This patch modifies net/sched/cls_cgroup.c to allow the net_cls subsystem to
be optionally compiled as a module instead of builtin. The cgroup_subsys
struct is moved around a bit to allow the
Provides support for unloading modular subsystems.
From: Ben Blum bb...@andrew.cmu.edu
This patch adds a new function cgroup_unload_subsys which is to be used for
removing a loaded subsystem during module deletion. Reference counting of the
subsystems' modules is moved from once (at load time)
Adds support for cgroup subsystems to specify dependencies on other subsystems
From: Ben Blum bb...@andrew.cmu.edu
This patch adds a mechanism with which a subsystem can specify dependencies on
other subsystems. Since subsystems can come and go, it would not be useful to
refer to a depended-upon
This more closely resembles what glibc does.
The last version had a push/popq %ebp. But, after looking at the glibc
code, I believe this to be unnecessary on 64-bit. Suka also pointed out
that we were neglecting to pull the subthread's function argument off
the stack.
I also changed the
On 04/12/09 8:05 -0800, Dave Hansen wrote:
syscall also destroys r11, so it should be added to the clobber list.
Even though it is a ptregscall?
The assembly instruction itself destroys r11 (same for rcx).
Thanks,
Louis
--
Dr Louis RillingKerlabs
Skype:
On 04/12/09 8:21 -0800, Dave Hansen wrote:
On Fri, 2009-12-04 at 17:08 +0100, Louis Rilling wrote:
On 04/12/09 8:05 -0800, Dave Hansen wrote:
syscall also destroys r11, so it should be added to the clobber list.
Even though it is a ptregscall?
The assembly instruction itself
This value can grow higher than 16k, but it clamped at packet receive
time if over that limit. Instead of failing here, just clamp to the same
limit.
Signed-off-by: Dan Smith da...@us.ibm.com
Cc: se...@us.ibm.com
Cc: or...@librato.com
---
net/ipv4/checkpoint.c |6 ++
1 files changed, 2
Thinking about it further, here are two possible scenarios:
A) Task maps a file beyond it's limit, never touches those
extra page (if it did, it would get EFAULT)
B) Task maps a file and writes the last page, then the file gets
truncated (by at least a page). The task may continue to access
Emit a warning if we attempt to checkpoint a task for which the user
nonvolatile register state (r13-r31) has not been saved. This should
not ever happen.
Signed-off-by: Nathan Lynch n...@pobox.com
---
arch/powerpc/mm/checkpoint.c |2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
Hi Oren,
Here are a few patches against ckpt-v19-rc2 that improve the state of
checkpoint/restart on powerpc. Please feel free to fold them into the
powerpc portion of the patchset.
Nathan Lynch (3):
checkpoint/powerpc: fix 32-bit build
checkpoint/powerpc: save and restore nvgprs for
On system call entry, powerpc explicitly saves and restores the full
user register state for only a few special system calls (fork,
clone, etc). The checkpoint and restart syscalls need this treatment
too.
Signed-off-by: Nathan Lynch n...@pobox.com
---
arch/powerpc/include/asm/systbl.h |4
Need to cast u64 to unsigned long before casting it to a pointer type.
Signed-off-by: Nathan Lynch n...@pobox.com
---
arch/powerpc/kernel/process.c |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index
Update to the values for ckpt-v19-rc2, and add eclone.
---
cr.h |8 ++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/cr.h b/cr.h
index a58c2e4..8acd750 100644
--- a/cr.h
+++ b/cr.h
@@ -71,12 +71,16 @@
/* parisc unsupported. */
#if __powerpc__
+#ifndef __NR_eclone
Bailing at the first failure in runall.sh inhibits good test coverage.
Attempt to run all tests and keep running counts of tests passed and
attempted.
Signed-off-by: Nathan Lynch n...@pobox.com
---
runall.sh | 60
1 files changed,
Quoting Dan Smith (da...@us.ibm.com):
This value can grow higher than 16k, but it clamped at packet receive
time if over that limit. Instead of failing here, just clamp to the same
limit.
Signed-off-by: Dan Smith da...@us.ibm.com
Cc: se...@us.ibm.com
Tested-by: Serge Hallyn
Hi Oren,
Here's a patch series against ckpt-v19-rc2 that fixes a couple of
minor issues for powerpc and adds a generic stack API (genstack).
Nathan Lynch (5):
catch attempts to build clone_ppc_.S in 64-bit mode
user-cr: align powerpc sp for eclone, clean up __eclone
user-cr: add generic
It will build fine, but runtime is another matter.
Signed-off-by: Nathan Lynch n...@pobox.com
---
clone_ppc_.S |4
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/clone_ppc_.S b/clone_ppc_.S
index b736e13..ebc07f3 100644
--- a/clone_ppc_.S
+++ b/clone_ppc_.S
@@ -11,6
Using genstack in nsexeccwp exposed this bug. The child_stack value
being passed to the kernel via clone_args was not properly aligned,
causing the child function to access the guard page.
And it turns out we needn't pass child_sp [r4] to the __eclone wrapper
at all, so remove it.
Finally, the
A few problems exist with the management of stacks for clone/eclone in
the restart utility.
* Stacks are allocated from the heap via malloc. This means any
mishandling of the the stack setup by the platform eclone code can
result in silent data corruption. At a time when architecture
Signed-off-by: Nathan Lynch n...@pobox.com
---
Makefile|2 +-
nsexeccwp.c | 11 ++-
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/Makefile b/Makefile
index b1485cb..35188f9 100644
--- a/Makefile
+++ b/Makefile
@@ -39,7 +39,7 @@ restart: CFLAGS += -D__REENTRANT
Fixes a couple of off-by-one bugs and makes it more portable.
Signed-off-by: Nathan Lynch n...@pobox.com
---
Makefile |2 +-
restart.c | 42 +-
2 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/Makefile b/Makefile
index
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