Serge E. Hallyn wrote:
Quoting Oren Laadan ([EMAIL PROTECTED]):
Serge E. Hallyn wrote:
Quoting Andrew Morton ([EMAIL PROTECTED]):
On Mon, 20 Oct 2008 01:40:30 -0400
Oren Laadan [EMAIL PROTECTED] wrote:
asmlinkage long sys_checkpoint(pid_t pid, int fd, unsigned long flags)
{
- pr_debug
Serge E. Hallyn wrote:
Quoting Oren Laadan ([EMAIL PROTECTED]):
Serge E. Hallyn wrote:
Quoting Oren Laadan ([EMAIL PROTECTED]):
Just thinking aloud...
Is read mode appropriate? The user can edit the statefile and restart
it. Admittedly the restart code should then do all
Peter Chubb wrote:
Oren == Oren Laadan [EMAIL PROTECTED] writes:
Oren Nope, since we will fail to restart in many cases. We will need
Oren a way to move from caller's credentials to saved credentials,
Oren and even from caller's credentials to privileged credentials
Oren (e.g. to reopen
Basic checkpoint-restart [C/R]: v8 adds support for external checkpoint
and improves documentation. Older announcements below.
The git tree tracking v8 (branch 'ckpt-v8'), and older versions, is at:
git://gorgona.ncl.cs.columbia.edu/pub/git/linux-cr-dev.git
(or for the latest version -
-present pages
Changelog[v4]:
- Use standard list_... for cr_pgarr
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
arch/x86/mm/checkpoint.c | 31 +++
arch/x86/mm/restart.c|1
/restore state of FPU
Changelog[v5]:
- Remove preempt_disable() when restoring debug registers
Changelog[v4]:
- Fix header structure alignment
Changelog[v2]:
- Pad header structures to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn
(this time indexed by its identifier). Otherwise, the object in
the hash table is used.
Changelog[v4]:
- Fix calculation of hash table size
Changelog[v3]:
- Use standard hlist_... for hash table
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off
Checkpoint-restart (c/r): fixes a couple of bugs and a DoS issue
(tested against v2.6.28-rc3).
We'd like these to make it into -mm. This version addresses the
last of the known bugs. Please pull at least the first 11 patches,
as they are similar to before.
Patches 1-11 are stable, providing
of the restarting task.
Changelog[v10]:
- Grab vfs root of container init, rather than current process
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
---
checkpoint/checkpoint.c| 75 ++--
checkpoint/restart.c
Covers application checkpoint/restart, overall design, interfaces,
usage, shared objects, and and checkpoint image format.
Changelog[v8]:
- Split into multiple files in Documentation/checkpoint/...
- Extend documentation, fix typos and comments from feedback
Signed-off-by: Oren Laadan [EMAIL
- Pad header structures to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
Makefile |2 +-
checkpoint/Makefile|2 +-
checkpoint
Dave Hansen wrote:
On Fri, 2008-11-28 at 11:27 +, Al Viro wrote:
On Wed, Nov 26, 2008 at 08:04:40PM -0500, Oren Laadan wrote:
+/**
+ * cr_attach_get_file - attach (and get) lonely file ptr to a file
descriptor
+ * @file: lonely file pointer
+ */
+static int cr_attach_get_file(struct
Dave Hansen wrote:
On Fri, 2008-11-28 at 10:53 +, Al Viro wrote:
+static int cr_ctx_checkpoint(struct cr_ctx *ctx, pid_t pid)
+{
+ ctx-root_pid = pid;
+
+ /*
+ * assume checkpointer is in container's root vfs
+ * FIXME: this works for now, but will change with real
Dave Hansen wrote:
On Mon, 2008-12-01 at 15:23 -0500, Oren Laadan wrote:
Verifying that the size doesn't change does not ensure that the table's
contents remained the same, so we can still end up with obsolete data.
With the realloc() scheme, we have virtually no guarantees about how
Covers application checkpoint/restart, overall design, interfaces,
usage, shared objects, and and checkpoint image format.
Changelog[v8]:
- Split into multiple files in Documentation/checkpoint/...
- Extend documentation, fix typos and comments from feedback
Signed-off-by: Oren Laadan [EMAIL
- Pad header structures to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
Makefile |2 +-
checkpoint/Makefile|2 +-
checkpoint
of hash table size
Changelog[v3]:
- Use standard hlist_... for hash table
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
checkpoint/Makefile|2 +-
checkpoint/objhash.c | 278
basic FDs - regular files, directories and also
symbolic links.
Changelog[v6]:
- Balance all calls to cr_hbuf_get() with matching cr_hbuf_put()
(even though it's not really needed)
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave
[v5]:
- Config is 'def_bool n' by default
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
arch/x86/include/asm/unistd_32.h |2 +
arch/x86/kernel/syscall_table_32.S |2 +
checkpoint/Kconfig
- Follow Dave Hansen's refactoring of the original post
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL PROTECTED]
---
arch/x86/include/asm/checkpoint_hdr.h | 85
arch/x86/mm/Makefile |2 +
arch
]:
- initialize 'coe' to workaround gcc false warning
Changelog[v6]:
- Balance all calls to cr_hbuf_get() with matching cr_hbuf_put()
(even though it's not really needed)
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
Signed-off-by: Dave Hansen [EMAIL
for creation of processes during restart either
in userspace or by the kernel.
Currently we ignore threads and zombies, as well as session ids.
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
---
checkpoint/checkpoint.c| 228
Checkpoint-restart (c/r): fixed races in file handling (comments from
from Al Viro). Updated and tested against v2.6.28-rc7 (feaf384...)
We'd like these to make it into -mm. This version addresses the
last of the known bugs. Please pull at least the first 11 patches,
as they are similar to
inside a container, and without
restoring the original pids of the processes (that is, provided that
the application can tolerate such behavior). This is useful to allow
multi-process restart of tasks not isolated inside a container, and
also for debugging.
Signed-off-by: Oren Laadan [EMAIL
of the restarting task.
Changelog[v11]:
- Copy contents of 'init-fs-root' instead of pointing to them
Changelog[v10]:
- Grab vfs root of container init, rather than current process
Signed-off-by: Oren Laadan [EMAIL PROTECTED]
Acked-by: Serge Hallyn [EMAIL PROTECTED]
---
checkpoint/checkpoint.c
Dave Hansen wrote:
On Tue, 2008-12-16 at 13:54 -0800, Mike Waychison wrote:
Oren Laadan wrote:
diff --git a/checkpoint/sys.c b/checkpoint/sys.c
index 375129c..bd14ef9 100644
--- a/checkpoint/sys.c
+++ b/checkpoint/sys.c
+/*
+ * During checkpoint and restart the code writes outs/reads
Mike Waychison wrote:
Oren Laadan wrote:
Dave Hansen wrote:
On Tue, 2008-12-16 at 13:54 -0800, Mike Waychison wrote:
Oren Laadan wrote:
diff --git a/checkpoint/sys.c b/checkpoint/sys.c
index 375129c..bd14ef9 100644
--- a/checkpoint/sys.c
+++ b/checkpoint/sys.c
+/*
+ * During
Mike Waychison wrote:
Comments below.
Thanks for the detailed review.
Oren Laadan wrote:
For each VMA, there is a 'struct cr_vma'; if the VMA is file-mapped,
it will be followed by the file name. Then comes the actual contents,
in one or more chunk: each chunk begins with a header
Dave Hansen wrote:
On Thu, 2008-12-18 at 06:10 -0500, Oren Laadan wrote:
+for (i = pgarr-nr_used; i--; /**/)
+page_cache_release(pgarr-pages[i]);
This is sorta hard to read (and non-intuitive). Is it easier to do:
for (i = 0; i pgarr-nr_used; i++)
page_cache_release
Mike Waychison wrote:
Oren Laadan wrote:
Mike Waychison wrote:
Comments below.
Thanks for the detailed review.
Oren Laadan wrote:
For each VMA, there is a 'struct cr_vma'; if the VMA is file-mapped,
it will be followed by the file name. Then comes the actual contents,
in one or more
[v5]:
- Config is 'def_bool n' by default
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
---
arch/x86/include/asm/unistd_32.h |2 +
arch/x86/kernel/syscall_table_32.S |2 +
checkpoint/Kconfig
basic FDs - regular files, directories and also
symbolic links.
Changelog[v12]:
- Replace obsolete cr_debug() with pr_debug()
Changelog[v6]:
- Balance all calls to cr_hbuf_get() with matching cr_hbuf_put()
(even though it's not really needed)
Signed-off-by: Oren Laadan
Covers application checkpoint/restart, overall design, interfaces,
usage, shared objects, and and checkpoint image format.
Changelog[v8]:
- Split into multiple files in Documentation/checkpoint/...
- Extend documentation, fix typos and comments from feedback
Signed-off-by: Oren Laadan
of the restarting task.
Changelog[v12]:
- Replace obsolete cr_debug() with pr_debug()
Changelog[v11]:
- Copy contents of 'init-fs-root' instead of pointing to them
Changelog[v10]:
- Grab vfs root of container init, rather than current process
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked
will be.
This can, of course, be fixed up in the future. We might want to
reset the flag when a new pid namespace is created, for instance.
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c|6 ++
include
cr_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/restart.c | 214 +++-
checkpoint/sys.c | 34 ++--
include/linux/checkpoint.h | 23 -
include/linux/sched.h |1 +
4 files changed, 258
header structure alignment
Changelog[v2]:
- Pad header structures to 64 bits to ensure compatibility
- Follow Dave Hansen's refactoring of the original post
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
These two are used in the next patch when calling vfs_read/write()
---
fs/read_write.c| 10 --
include/linux/fs.h | 10 ++
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 969a6d9..dda4eab 100644
--- a/fs/read_write.c
()
Changelog[v4]:
- Use standard list_... for cr_pgarr
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
---
arch/x86/include/asm/checkpoint_hdr.h |5 +
arch/x86/mm/restart.c | 58
to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
---
Makefile |2 +-
checkpoint/Makefile|2 +-
checkpoint/checkpoint.c| 188
of hash table size
Changelog[v3]:
- Use standard hlist_... for hash table
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
---
checkpoint/Makefile|2 +-
checkpoint/objhash.c | 278
()
- Drop useless kfree from cr_scan_fds()
Changelog[v8]:
- initialize 'coe' to workaround gcc false warning
Changelog[v6]:
- Balance all calls to cr_hbuf_get() with matching cr_hbuf_put()
(even though it's not really needed)
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked
for creation of processes during restart either
in userspace or by the kernel.
Currently we ignore threads and zombies, as well as session ids.
Changelog[v12]:
- Replace obsolete cr_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Nathan Lynch wrote:
+/* count number of tasks in tree (and optionally fill pid's in array) */
+static int cr_tree_count_tasks(struct cr_ctx *ctx)
+{
+struct task_struct *root = ctx-root_task;
+struct task_struct *task = root;
+struct task_struct *parent = NULL;
+struct
will be.
This can, of course, be fixed up in the future. We might want to
reset the flag when a new pid namespace is created, for instance.
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c|6 ++
include
-checkpoint_ctx regardless of error condition
- Remove unused argument 'ctx' from do_restart_task() prototype
- Remove unused member 'pids_err' from 'struct cr_ctx'
Changelog[v12]:
- Replace obsolete cr_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn
()
- Drop useless kfree from cr_scan_fds()
Changelog[v8]:
- initialize 'coe' to workaround gcc false warning
Changelog[v6]:
- Balance all calls to cr_hbuf_get() with matching cr_hbuf_put()
(even though it's not really needed)
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked
chunks of vaddrs, pages
instead of one long list of each
- Memory restore now maps user pages explicitly to copy data into them,
instead of reading directly to user space; got rid of mprotect_fixup()
Changelog[v4]:
- Use standard list_... for cr_pgarr
Signed-off-by: Oren Laadan
Oren Laadan wrote:
Hi,
Just got back from 3 weeks with practically no internet, and I see
that I missed a big party !
Trying to catch up with what's been said so far --
[...]
- Will any of this involve non-trivial serialisation of kernel
objects? If so, that's getting
Dave Hansen wrote:
On Fri, 2009-03-13 at 14:01 -0700, Linus Torvalds wrote:
On Fri, 13 Mar 2009, Alexey Dobriyan wrote:
Let's face it, we're not going to _ever_ checkpoint any kind of general
case process. Just TCP makes that fundamentally impossible in the general
case, and there are
Mike Waychison wrote:
Linus Torvalds wrote:
On Thu, 12 Mar 2009, Sukadev Bhattiprolu wrote:
Ying Han [ying...@google.com] wrote:
| Hi Serge:
| I made a patch based on Oren's tree recently which implement a new
| syscall clone_with_pid. I tested with checkpoint/restart process tree
| and
Nathan Lynch wrote:
Hi, this is an old thread I guess, but I just noticed some issues while
looking at this code.
On Tue, 27 Jan 2009 12:08:03 -0500
Oren Laadan or...@cs.columbia.edu wrote:
+static int cr_read_cpu_fpu(struct cr_ctx *ctx, struct task_struct *t)
+{
+void *xstate_buf
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
include/linux/mm.h |5 +
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index bff1f0d..05f0ed9 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -14,6 +14,8 @@
#include
Save and restores the common state (parameters) of ipc namespace.
Also add logic to iterate through the objects of sysvipc shared memory,
message queues and semaphores. The logic to save and restore the state
of these objects will be added in the next few patches.
Signed-off-by: Oren Laadan
Export functionality to retrieve specific pages from shared memory
given an inode in shmem-fs; this will be used in the next two patches
to provide support for c/r of shared memory.
mm/shmem.c:
- shmem_getpage() and 'enum sgp_type' moved to linux/mm.h
Signed-off-by: Oren Laadan
From: Dan Smith da...@us.ibm.com
Implement the s390 arch-specific checkpoint/restart helpers. This
is on top of Oren Laadan's c/r code.
With these, I am able to checkpoint and restart simple programs as per
Oren's patch intro. While on x86 I never had to freeze a single task
to checkpoint it,
) to allow chunks of vaddrs, pages
instead of one long list of each
- Fix use of follow_page() to avoid faulting in non-present pages
Changelog[v4]:
- Use standard list_... for ckpt_pgarr
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
arch/x86/include/asm/checkpoint_hdr.h |8 +
arch/x86
operation as a
whole, and later a task in particular, to defer some action until
later (but not arbitrarily later) _in the restore_ operation.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/Kconfig |5 ++
include/linux/deferqueue.h | 58 +++
kernel
into the same format
on 32- and 64-bit architectures, the checkpoint format is simply the
dump of this array as is.
TODO: this patch does not handle semaphore-undo -- this data should be
saved per-task while iterating through the tasks.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
include
-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/memory.c | 28 -
checkpoint/sys.c | 10 ++
include/linux/checkpoint.h |3 +
include/linux/checkpoint_hdr.h | 19 +++-
include/linux/checkpoint_types.h |1 +
include/linux/shm.h
From: Dan Smith da...@us.ibm.com
Signed-off-by: Dan Smith da...@us.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c| 20 ++--
checkpoint/objhash.c | 28 +++
checkpoint/process.c | 101
call to copy buffers from one
pipe to another. This obvious and trivial use case for splice() was
not supported until now.
It reuses the functions link_ipipe_prep() and link_opipe_prep() from
the tee() system call implementation.
--
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
fs
information record
- Update Documentation to reflect new location of namespace info
- Support checkpoint and restart of nested UTS namespaces
Signed-off-by: Dan Smith da...@us.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c|2 -
checkpoint
for the task to execute the signal
handler (by faking a signal). The handler, in turn, already has the
code to handle these restart request gracefully.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
arch/x86/include/asm/checkpoint_hdr.h |1 -
arch/x86/mm/checkpoint.c | 10
.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c|8
checkpoint/objhash.c | 82 ++--
include/linux/checkpoint.h |1 +
3 files changed, 88 insertions(+), 3 deletions(-)
diff --git a/checkpoint/checkpoint.c b
of
ipc objects, but does not restore them during restart.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
include/linux/checkpoint.h |7 +++-
include/linux/checkpoint_hdr.h | 29 ++
ipc/Makefile |1 +
ipc/checkpoint.c | 81
During restart, we need to allocate ipc objects that with the same
identifiers as recorded during checkpoint. Modify the allocation
code allow an in-kernel caller to request a specific ipc identifier.
The system call interface remains unchanged.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
]:
- Release tasklist_lock in error path in ckpt_tree_count_tasks()
- Use separate index for 'tasks_arr' and 'hh' in ckpt_write_pids()
Changelog[v12]:
- Replace obsolete ckpt_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/checkpoint.c | 237
'struct ckpt_ctx'
Changelog[v12]:
- Replace obsolete ckpt_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/restart.c | 242 --
checkpoint/sys.c | 27 -
include/linux/checkpoint.h |3
These two are used in the next patch when calling vfs_read/write()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
fs/read_write.c| 10 --
include/linux/fs.h | 10 ++
2 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
arch/x86/include/asm/checkpoint_hdr.h | 110 +
arch/x86/mm/Makefile |2 +
arch/x86/mm/checkpoint.c | 431 +
checkpoint/checkpoint.c |7 +-
checkpoint
grabbing a reference and object lifetime
Changelog[v4]:
- Fix calculation of hash table size
Changelog[v3]:
- Use standard hlist_... for hash table
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/Makefile |1 +
checkpoint/objhash.c | 397
before they are referenced
unless they are compound)
Changelog[v8]:
- Split into multiple files in Documentation/checkpoint/...
- Extend documentation, fix typos and comments from feedback
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
Signed-off
} to checkpoint header
- Pad header structures to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
Makefile |2 +-
checkpoint/Makefile |6 +-
checkpoint/checkpoint.c | 261 +++
checkpoint
On Thu, 28 May 2009, Alexey Dobriyan wrote:
On Wed, May 27, 2009 at 01:32:45PM -0400, Oren Laadan wrote:
Now we can do external checkpoint, i.e. act on another task.
+static int may_checkpoint_task(struct ckpt_ctx *ctx, struct task_struct *t)
+{
+ if (t-state == TASK_DEAD
From: Dave Hansen d...@linux.vnet.ibm.com
Let's not steal too much space in the 'General Setup' menu.
Take a cue from the cgroups code and create a submenu.
This can go upstream now.
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
Acked-by: Oren Laadan or...@cs.columbia.edu
---
init/Kconfig
-by: Oren Laadan or...@cs.columbia.edu
---
arch/powerpc/include/asm/elf.h |1 +
arch/powerpc/kernel/vdso.c | 13 -
arch/s390/include/asm/elf.h|2 +-
arch/s390/kernel/vdso.c| 13 -
arch/sh/include/asm/elf.h |1 +
arch/sh/kernel
tasks are already zombified (as opposed to perhap only
becoming a zombie).
Changelog[v17]:
- Validate t-exit_signal for both threads and leader
- Skip zombies in most of may_checkpoint_task()
- Save/restore t-pdeath_signal
- Validate -exit_signal and -pdeath_signal
Signed-off-by: Oren Laadan
From: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com
The new parameter will be used in a follow-on patch when clone_with_pids()
is implemented.
Signed-off-by: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com
Acked-by: Serge Hallyn se...@us.ibm.com
Reviewed-by: Oren Laadan or...@cs.columbia.edu
() macro to help copying register arrays,
etc
. Move the macro definitions inside the CR #ifdef
Feb 25:
. Changed WARN_ON() to BUILD_BUG_ON()
Signed-off-by: Dan Smith da...@us.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
1:
https://lists.linux
than have callers assume -ENOMEM, have alloc_pidmap() return
the actual error.
Signed-off-by: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com
Acked-by: Serge Hallyn se...@us.ibm.com
Reviewed-by: Oren Laadan or...@cs.columbia.edu
---
kernel/fork.c |5 +++--
kernel/pid.c |9 ++---
2
From: Dave Hansen d...@linux.vnet.ibm.com
This marks ext[234] as being checkpointable. There will be many
more to do this to, but this is a start.
Signed-off-by: Dave Hansen d...@linux.vnet.ibm.com
---
fs/ext2/dir.c |1 +
fs/ext2/file.c |2 ++
fs/ext3/dir.c |1 +
fs/ext3/file.c |
-by: Oren Laadan or...@cs.columbia.edu
---
arch/x86/include/asm/checkpoint_hdr.h |8 +
arch/x86/mm/checkpoint.c | 31 ++
checkpoint/Makefile |3 +-
checkpoint/checkpoint.c |3 +
checkpoint/memory.c | 688
of namespace info
- Support checkpoint and restart of nested UTS namespaces
Signed-off-by: Dan Smith da...@us.ibm.com
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/Makefile |1 +
checkpoint/checkpoint.c |5 +-
checkpoint/namespace.c | 100
'struct ckpt_ctx'
Changelog[v12]:
- Replace obsolete ckpt_debug() with pr_debug()
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/restart.c | 461 --
checkpoint/sys.c | 33 ++-
include/linux/checkpoint.h | 39
]:
- Use standard hlist_... for hash table
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/Makefile |1 +
checkpoint/objhash.c | 419 ++
checkpoint/restart.c | 50 +-
checkpoint/sys.c
.
Changelog[v17]:
- Restore objects in the right namespace
- Properly initialize ctx-deferqueue
- Fix compilation with CONFIG_CHECKPOINT=n
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint/memory.c | 28 -
checkpoint/sys.c | 13 ++
include/linux
From: Serge E. Hallyn se...@us.ibm.com
Hook up the clone_with_pids system call for s390x. clone_with_pids()
takes an additional argument over clone(), which we pass in through
register 7. Stub code for using the syscall looks like:
struct target_pid_set {
int num_pids;
pid_t
,
resulting in a program owned by hallyn.
Changelog:
Jun 15: Fix user_ns handling when !CONFIG_USER_N
Set creator_ref=0 for root_ns (discard @flags)
Don't overwrite global user-ns if CONFIG_USER_NS
Jun 10: Merge with ckpt-v16-dev (Oren Laadan
From: Matt Helsley matth...@us.ibm.com
Update stale comments regarding locking order and add a little more detail
so it's easier to follow the locking between the cgroup freezer and the
power management freezer code.
Signed-off-by: Matt Helsley matth...@us.ibm.com
Cc: Oren Laadan
.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
Acked-by: Serge Hallyn se...@us.ibm.com
---
fs/select.c |2 +-
include/linux/futex.h| 11 +++
include/linux/poll.h |3 +++
include/linux/posix-timers.h |6 ++
kernel/compat.c
/fork.c)
Signed-off-by: Sukadev Bhattiprolu suka...@linux.vnet.ibm.com
Acked-by: Serge Hallyn se...@us.ibm.com
Reviewed-by: Oren Laadan or...@cs.columbia.edu
---
include/linux/sched.h |3 +++
include/linux/types.h |5 +
kernel/fork.c | 16 ++--
3 files changed, 22
From: Dan Smith da...@us.ibm.com
Implement the s390 arch-specific checkpoint/restart helpers. This
is on top of Oren Laadan's c/r code.
With these, I am able to checkpoint and restart simple programs as per
Oren's patch intro. While on x86 I never had to freeze a single task
to checkpoint it,
During restart, we need to allocate ipc objects that with the same
identifiers as recorded during checkpoint. Modify the allocation
code allow an in-kernel caller to request a specific ipc identifier.
The system call interface remains unchanged.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
splice_pipe_to_pipe() directly.
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
fs/splice.c| 61 ---
include/linux/splice.h |9 +++
2 files changed, 50 insertions(+), 20 deletions(-)
diff --git a/fs/splice.c b/fs/splice.c
index 73766d2
, while the leak-detection
pre-step took place.
Changelog[v17]:
- Leak detection is performed in two-steps
- Detect reverse-leaks (objects disappearing unexpectedly)
- Skip reverse-leak detection if ops-ref_users isn't defined
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
checkpoint
structure alignment
Changelog[v2]:
- Pad header structures to 64 bits to ensure compatibility
- Follow Dave Hansen's refactoring of the original post
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
arch/x86/include/asm/Kbuild |1 +
arch/x86/include/asm/checkpoint_hdr.h | 122
Application checkpoint/restart (c/r) is the ability to save the state
of a running application so that it can later resume its execution
from the time at which it was checkpointed, on the same or a different
machine.
This version introduces 'clone_with_pids()' syscall to preset pid(s)
for a child
it's not really needed)
Changelog[v5]:
- Rename headers files s/ckpt/checkpoint/
Changelog[v2]:
- Added utsname-{release,version,machine} to checkpoint header
- Pad header structures to 64 bits to ensure compatibility
Signed-off-by: Oren Laadan or...@cs.columbia.edu
---
Makefile
Cyrill Gorcunov wrote:
[Oren Laadan - Wed, Jul 22, 2009 at 06:00:14AM -0400]
...
| +static struct sem *restore_sem_array(struct ckpt_ctx *ctx, int nsems)
| +{
| + struct sem *sma;
| + int i, ret;
| +
| + sma = kmalloc(nsems * sizeof(*sma), GFP_KERNEL);
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