Just FYI:
I remember posting something a few days ago to make the serial console more
reliable for such situations. Some allocations in the serial port driver are
done at runtime using page_alloc, if somebody runs out of memory the serial
tty driver would not work properly.
I am not saying that
I realize that the Linux kernel supports user
level drivers (via ioperm, etc). However interrupts
at user level are not supported, does anyone think
it would be a good idea to add user level interrupt
support ? I have a framework for it, but it still
needs
a lot of work.
Depending on the
Shouldn't there be a sigclose() and other operations to make the API
orthogonal. sigopen() should be selective about the signals it allows
as argument. Try and make sigopen() thread specific, so that if one
thread does a sigopen(), it does not imply it will do all the signal
handling for all the
|
| Let me know, when somebody has a patch or needs help, I would like to
| help or take a look at it.
|
|Maybe we can both hack on this.
|
Sure, that should be interesting, did you have something in mind ? We can
start right away.
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You need to compile with the correct kernel headers using the include
path feature -I path to new headers
Balbir
On Tue, 3 Jul 2001, SATHISH.J wrote:
|Hi,
|
|I tried to use kdb on my 2.2.14-12 kernel. I was able to compile the file
|/usr/src/linux/arch/i386/kdb/modules/kdbm_vm.c and could
[])
loop = 1;
break;
default:
- printf(Unknown option %d\n, c);
+ usage();
exit(-1);
}
}
_
--
Warm Regards,
Balbir Singh
Linux Technology Center
,# read_char
224,# write_char
232,# read_syscalls
240,# write_syscalls
248,# read_bytes
256,# write_bytes
264,# cancelled_write_bytes
);
Signed-off-by: Balbir Singh [EMAIL PROTECTED]
---
include/linux/taskstats.h | 11
Andrew Morton wrote:
On Fri, 20 Apr 2007 22:13:41 +0530
Balbir Singh [EMAIL PROTECTED] wrote:
We broke the the alignment of members of taskstats to the 8 byte boundary
with the CSA patches. In the current kernel, the taskstats structure is
not suitable for use by 32 bit applications in a 64
Andrew Morton wrote:
On Sat, 21 Apr 2007 18:29:21 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
The patch adds an __attribute__((aligned(8))) to the
taskstats structure members so that 32 bit applications using taskstats
can work with a 64 bit kernel.
But there might be 32-bit applications out
problem I had with my RSS controller patches.
+
+ list_move(pc-list, pc_list);
+
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Linux Technology Center
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Pavel Emelianov wrote:
Balbir Singh wrote:
Pavel Emelianov wrote:
Implement try_to_free_pages_in_container() to free the
pages in container that has run out of memory.
The scan_control-isolate_pages() function isolates the
container pages only.
Pavel,
I've just started playing around
Hi, Pavel,
Please find my patch to add LRU behaviour to your latest RSS controller.
Balbir Singh
Linux Technology Center
IBM, ISTL
Add LRU behaviour to the RSS controller patches posted by Pavel Emelianov
http://lkml.org/lkml/2007/3/6/198
which was in turn similar to the RSS controller
like resizing a zone, finding the right size,
etc. I'll look
at Mel's patches to see what is supported.
Warm Regards,
Balbir Singh
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doesn't look so good for me, mainly becaus of the
additional per page data and per page processing
on 4GB memory, with 100 guests, 50% shared for each
guest, this basically means ~1mio pages, 500k shared
and 1500k x sizeof(page_container) entries, which
roughly boils down to ~25MB of wasted
On 3/12/07, Dave Hansen [EMAIL PROTECTED] wrote:
On Mon, 2007-03-12 at 19:16 +0300, Kirill Korotaev wrote:
now VE2 maps the same page. You can't determine whether this page is mapped
to this container or another one w/o page-container pointer.
Hi Kirill,
I thought we can always get from the
From: Pavel Emelianov [EMAIL PROTECTED]
To: Andrew Morton [EMAIL PROTECTED], Paul Menage [EMAIL PROTECTED],
Srivatsa Vaddagiri [EMAIL PROTECTED],
Balbir Singh [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED],
Linux Kernel Mailing List linux-kernel@vger.kernel.org
Date: Tue, 06 Mar
several advantages
1. The limits can be individually set and controlled.
2. The code is broken down into simpler chunks for review and merging.
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Linux Technology Center
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Nick Piggin wrote:
Balbir Singh wrote:
Nick Piggin wrote:
And strangely, this example does not go outside the parameters of
what you asked for AFAIKS. In the worst case of one container getting
_all_ the shared pages, they will still remain inside their maximum
rss limit.
When that does
.
It needs some cleaning up. I hope to get to it after the OLS
paper submission deadline.
Thanks,
Thanks for bringing the issue to my notice,
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the containers list...
does everyone still have *different* plans, or is any sort of consensus
being reached?
hope we'll have it soon :)
Good luck ;)
I think we have made some forward progress on the consensus.
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Linux Technology Center
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Andrew Morton wrote:
On Wed, 14 Mar 2007 17:48:32 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
Randy.Dunlap wrote:
Hi,
Documentation/accounting/delay-accounting.txt says that the
getdelays program has a -c cmd argument, but that option
does not seem to exist in Documentation/account/getdelays.c
(callback_mutex);
multiuser_container does not apply
Is anybody else seeing this problem?
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Comments criticism are welcome.
Series
--
memctlr-setup.patch
memctlr-acct.patch
memctlr-reclaim-on-limit.patch
memctlr-doc.patch
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+1,22 @@
+/* memctlr.h - Memory Controller for containers
+ *
+ * Copyright (C) Balbir Singh, IBM Corp. 2006-2007
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free
)));
page_add_anon_rmap(page, vma, addr);
+ memctlr_update_rss(vma-vm_mm, 1, MEMCTLR_DONT_CHECK_LIMIT);
swap_free(entry);
/*
* Move the page to the active list so it is not
_
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changed to run anywhere: as the first one comes back,
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Please read
control. It is planned to add
+the following components
+
+1. Page Cache control
+2. mlock'ed memory control
+3. kernel memory allocation control (memory allocated on behalf of a task)
_
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Andrew Morton wrote:
On Mon, 19 Feb 2007 12:20:19 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
This patch applies on top of Paul Menage's container patches (V7) posted at
http://lkml.org/lkml/2007/2/12/88
It implements a controller within the containers framework for limiting
memory
Andrew Morton wrote:
On Mon, 19 Feb 2007 12:20:26 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
This patch sets up the basic controller infrastructure on top of the
containers infrastructure. Two files are provided for monitoring
and control memctlr_usage and memctlr_limit.
The patches use
, that's a problem, but I think it's a problem that can be solved
in steps. First step, add reclaim. Second step, optimize reclaim.
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More
Andrew Morton wrote:
On Mon, 19 Feb 2007 12:20:34 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
This patch adds the basic accounting hooks to account for pages allocated
into the RSS of a process. Accounting is maintained at two levels, in
the mm_struct of each task and in the memory controller
useful for the page cache controller
2. Check if the page belongs to a particular container before
the list_del(page-lru), so that those pages can be skipped.
3. Use a double LRU list by overloading the lru list_head of
struct page.
Paul
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Balbir Singh
Magnus Damm wrote:
On 2/19/07, Andrew Morton [EMAIL PROTECTED] wrote:
On Mon, 19 Feb 2007 12:20:19 +0530 Balbir Singh [EMAIL PROTECTED]
wrote:
This patch applies on top of Paul Menage's container patches (V7)
posted at
http://lkml.org/lkml/2007/2/12/88
It implements a controller
Andrew Morton wrote:
On Mon, 19 Feb 2007 12:20:42 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
This patch reclaims pages from a container when the container limit is hit.
The executable is oom'ed only when the container it is running in, is overlimit
and we could not reclaim any pages belonging
KAMEZAWA Hiroyuki wrote:
On Mon, 19 Feb 2007 12:20:42 +0530
Balbir Singh [EMAIL PROTECTED] wrote:
+int memctlr_mm_overlimit(struct mm_struct *mm, void *sc_cont)
+{
+ struct container *cont;
+ struct memctlr *mem;
+ long usage, limit;
+ int ret = 1
Andrew Morton wrote:
On Mon, 19 Feb 2007 16:07:44 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
+void memctlr_mm_free(struct mm_struct *mm)
+{
+ kfree(mm-counter);
+}
+
+static inline void memctlr_mm_assign_container_direct(struct mm_struct *mm
methods.
It should be easy to add container_remove_file() instead of marking
an error.
Paul
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Andrew Morton wrote:
On Mon, 19 Feb 2007 16:20:53 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
+ * so, is the container over it's limit. Returns 1 if the container is above
+ * its limit.
+ */
+int memctlr_mm_overlimit(struct mm_struct *mm, void *sc_cont)
+{
+ struct container *cont
Andrew Morton wrote:
On Mon, 19 Feb 2007 16:39:33 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
Andrew Morton wrote:
On Mon, 19 Feb 2007 16:07:44 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
+void memctlr_mm_free(struct mm_struct *mm)
+{
+ kfree(mm-counter);
+}
+
+static inline void
Magnus Damm wrote:
On 2/19/07, Balbir Singh [EMAIL PROTECTED] wrote:
Magnus Damm wrote:
On 2/19/07, Andrew Morton [EMAIL PROTECTED] wrote:
On Mon, 19 Feb 2007 12:20:19 +0530 Balbir Singh [EMAIL PROTECTED]
wrote:
This patch applies on top of Paul Menage's container patches (V7)
posted
of:
./getdelays: invalid option -- h
Unknown option 63
(or just remove that message)
3. -v does not use an optarg, so remove ':' in getopt string after 'v';
Thanks, these look good. I'll add them to my local copy.
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Linux Technology Center
to listen to the maintainers when they talk of design ;)
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Linux Technology Center
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,
Balbir Singh
Linux Technology Center
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Please read the FAQ at http://www.tux.org
to the reclaim logic, we hope
to integrate a page cache controller soon. We are also testing the
patches. Hopefully soon enough, they'll be in a good state and we can
request you to merge the containers and the rss limit (plus page cache)
controller soon.
--
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Balbir Singh
Andrew Morton wrote:
On Mon, 26 Mar 2007 08:06:07 +0530 Balbir Singh [EMAIL PROTECTED] wrote:
Andrew Morton wrote:
Don't we break the global LRU with this scheme?
Sure, but that's deliberate!
(And we don't have a global LRU - the LRUs are per-zone).
Yes, true. But if we use zones
the same general mechanism for
data communication to user space.
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Linux Technology Center
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Paul Menage wrote:
On 2/19/07, Balbir Singh [EMAIL PROTECTED] wrote:
More worrisome is the potential for use-after-free. What prevents the
pointer at mm-container from referring to freed memory after we're dropped
the lock?
The container cannot be freed unless all tasks holding references
Vaidyanathan Srinivasan wrote:
Balbir Singh wrote:
Paul Menage wrote:
On 2/19/07, Balbir Singh [EMAIL PROTECTED] wrote:
More worrisome is the potential for use-after-free. What prevents the
pointer at mm-container from referring to freed memory after we're dropped
the lock?
The container
Regards,
Balbir Singh
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Please read the FAQ at http://www.tux.org/lkml/
, 2006-2007
+ *
+ * Author: Balbir Singh [EMAIL PROTECTED]
+ *
+ */
+
+#ifndef _LINUX_MEMCONTROL_H
+#define _LINUX_MEMCONTROL_H
+
+#ifdef CONFIG_CONTAINER_MEMCONTROL
+#ifndef kB
+#define kB 1024/* One Kilo Byte */
+#endif
+
+#else /* CONFIG_CONTAINER_MEMCONTROL */
+
+#endif
to the active list so it is not
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lists and reinitialise the emptied list.
* @list: the new list to add.
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RSS control. It is planned to add
+the following components
+
+1. Page Cache control
+2. mlock'ed memory control
+3. kernel memory allocation control (memory allocated on behalf of a task)
_
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Hi,
My script could not parse the (#2) and posted the patches as subject
followed by ( instead
I apologize,
Balbir Singh
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, 2006-2007
+ *
+ * Author: Balbir Singh [EMAIL PROTECTED]
+ *
+ */
+
+#ifndef _LINUX_MEMCONTROL_H
+#define _LINUX_MEMCONTROL_H
+
+#ifdef CONFIG_CONTAINER_MEMCONTROL
+#ifndef kB
+#define kB 1024/* One Kilo Byte */
+#endif
+
+#else /* CONFIG_CONTAINER_MEMCONTROL */
+
+#endif
RSS control. It is planned to add
+the following components
+
+1. Page Cache control
+2. mlock'ed memory control
+3. kernel memory allocation control (memory allocated on behalf of a task)
_
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* @list: the new list to add.
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criticism are welcome.
Series
--
memcontrol-setup.patch
memcontrol-acct.patch
memcontrol-reclaim-on-limit.patch
memcontrol-doc.patch
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to the active list so it is not
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is very easy (with minimal changes to the core mm),
supplemented with an efficient per-container reclaimer, it should be
easy to implement a good per-container RSS controller.
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.
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Please read the FAQ
Linus Torvalds wrote:
On Fri, 2 Mar 2007, Balbir Singh wrote:
My personal opinion is that while I'm not a huge fan of virtualization,
these kinds of things really _can_ be handled more cleanly at that layer,
and not in the kernel at all. Afaik, it's what IBM already does, and has
been doing
|1
linux-2.6.20-vatsa/kernel/Makefile |1
---
The diffstat does not look quite right.
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Con Kolivas wrote:
Add a list_splice_tail variant of list_splice.
Patch-by: Peter Zijlstra [EMAIL PROTECTED]
Signed-off-by: Con Kolivas [EMAIL PROTECTED]
Acked-by: Balbir Singh [EMAIL PROTECTED]
I had the same exact patch in my memcontrol at
http://lkml.org/lkml/2007/2/24/68 (see the last
?
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Please read
,
+};
+
+void __init container_rss_init_early(void)
+{
+ container_register_subsys(rss_subsys);
+ init_mm.rss_container = rss_from_cont(
+ task_container(init_task, rss_subsys));
+ css_get_current(init_mm.rss_container-css);
+}
--
Warm Regards,
Balbir
to compile without patch 5 applied.
Patch 1 failed to apply with a reject in kernel/Makefile
I applied it on top of 2.6.20 with all of Paul Menage's
patches (all 7).
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. Without page cache control, we could
end up with too many pages moving over to the swap cache and still
occupying memory, while the original intension was to avoid this
scenario.
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was not being eliminated
(__you_cannot_kmalloc_that_much), even though no one called that
function. I suspect builtin_constant_p() and dead code elimination as
the root causes of this error.
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Linux Technology Center
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On Jan 9, 2008 12:52 PM, Rishikesh K. Rajak [EMAIL PROTECTED] wrote:
Hi All,
You can find the code coverage data for container code which has been
merged with mainline linux-2.6.23 and respective testcases are merged with
ltp for the feature called SYSVIPC NAMESPACE UTS NAMESPACE .
I
On Jan 9, 2008 2:45 PM, Subrata Modak [EMAIL PROTECTED] wrote:
On Wed, 2008-01-09 at 14:38 +0530, Balbir Singh wrote:
On Jan 9, 2008 12:52 PM, Rishikesh K. Rajak [EMAIL PROTECTED] wrote:
Hi All,
You can find the code coverage data for container code which has been
merged
on the node's zone LRU need not be active
in the memory cgroup.
ANON - FILE attribute can be changed dinamically (after added to LRU) ?
If no, using page_file_cache(pc-page) will be easy.
Thanks,
-Kame
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* KAMEZAWA Hiroyuki [EMAIL PROTECTED] [2008-01-10 11:36:18]:
On Thu, 10 Jan 2008 07:51:33 +0530
Balbir Singh [EMAIL PROTECTED] wrote:
#define PAGE_CGROUP_FLAG_CACHE (0x1) /* charged as cache */
#define PAGE_CGROUP_FLAG_ACTIVE (0x2) /* page is active in this
cgroup
(NR_INACTIVE_FILE);
-}
-
/*
* Try to free `nr_pages' of memory, system-wide, and return the number of
* freed pages.
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the body
or a child
Killed process 6593 (pagetest)
I am using a powerpc box with 64K size pages. I'll try and investigate further,
just a heads up on the failure I am seeing.
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On Jan 11, 2008 4:15 AM, Andrea Righi [EMAIL PROTECTED] wrote:
Allow to limit the bandwidth of I/O-intensive processes, like backup
tools running in background, large files copy, checksums on huge files,
etc.
This kind of processes can noticeably impact the system responsiveness
for some
* Rik van Riel [EMAIL PROTECTED] [2008-01-08 15:59:57]:
The following patch is required to compile the code with
CONFIG_NORECLAIM enabled and CONFIG_NORECLAIM_MLOCK disabled.
Signed-off-by: Balbir Singh [EMAIL PROTECTED]
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index c8ccf8f
with
seeks or data, it might be what CFQ does, but I've never even read the
code.
So far the definition of I/O bandwidth has been w.r.t time. Not all IO
devices have sectors; I'd prefer bytes over a period of time.
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Linux Technology Center
Tn_FSB_EN_CNF_MASK (0x4000UL)
The patch looks good overall!
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More
* Andrea Righi [EMAIL PROTECTED] [2008-01-12 19:01:14]:
Peter Zijlstra wrote:
On Sat, 2008-01-12 at 16:27 +0530, Balbir Singh wrote:
* Peter Zijlstra [EMAIL PROTECTED] [2008-01-12 10:46:37]:
On Fri, 2008-01-11 at 23:57 -0500, [EMAIL PROTECTED] wrote:
On Fri, 11 Jan 2008 17:32:49 +0100
,
Balbir Singh
Linux Technology Center
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Please read the FAQ at http://www.tux.org/lkml/
On 9/13/07, Pavel Emelyanov [EMAIL PROTECTED] wrote:
J. Bruce Fields wrote:
On Tue, Sep 11, 2007 at 04:38:13PM +0400, Pavel Emelyanov wrote:
This is a known feature that such re-locking is not atomic,
but in the racy case the file should stay locked (although by
some other process), but
it's only the bus drivers
and device drivers that do that now.
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amount by calling swapoff.
}
/*
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Please read the FAQ
heard AIM7 come up often, but never been
able to push it much. I should retry.
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Hugh Dickins wrote:
On Tue, 18 Sep 2007, Balbir Singh wrote:
Hugh Dickins wrote:
More fundamentally, it looks like any container brought over its limit in
unuse_pte will abort swapoff: that doesn't doesn't seem contained to me.
Maybe unuse_pte should just let containers go over their limits
Hugh Dickins wrote:
On Tue, 18 Sep 2007, Balbir Singh wrote:
Hugh Dickins wrote:
What would make sense is (what I meant when I said swap counted
along with RSS) not to count pages out and back in as they are
go out to swap and back in, just keep count of instantiated pages
I am not sure how
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Balbir Singh
Linux Technology Center
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Christoph Lameter wrote:
On Wed, 19 Sep 2007, Balbir Singh wrote:
The fix looks correct, radix_tree_preload() does the same thing in
add_to_page_cache(). Thanks for identifying the fix
Hmmm Radix tree preload can only take a limited set of flags?
Yes, the whole code is very
Christoph Lameter wrote:
On Wed, 19 Sep 2007, Balbir Singh wrote:
Yes, the whole code is very interesting. From add_to_page_cache()
we call radix_tree_preload with __GFP_HIGHMEM cleared, but
from __add_to_swap_cache(), we don't make any changes to the
gfp_mask. radix_tree_preload() calls
and test
queue (which has gotten rather long of late). I'll test it further and
get back.
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Balbir Singh
Linux Technology Center
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, I see, removing the memcpy is definitely wrong. Thanks for catching
it. I did not get a chance to review the patch, it's on my review queue,
but since you've reviewed it, I am very glad that you have and
identified potential issues.
Big Thanks!
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Balbir Singh
Linux Technology
for monitoring. cpu_acct fills this gap. I think in the
long run, we should move the helper functions into cpu_acct.c
and the interface logic into kernel/sched.c (cpu controller).
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Balbir Singh
Linux Technology Center
IBM, ISTL
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On Nov 13, 2007 12:38 PM, Al Boldi [EMAIL PROTECTED] wrote:
kloczek wrote:
Some data showed by top command looks like completly trashed.
Fragment from top output:
Mem: 2075784k total, 2053352k used,22432k free,19260k buffers
Swap: 2096472k total, 136k used, 2096336k
Paul Menage wrote:
On Nov 12, 2007 11:00 PM, Balbir Singh [EMAIL PROTECTED] wrote:
Right now, one of the limitations of the CPU controller is that
the moment you create another control group, the bandwidth gets
divided by the default number of shares. We can't create groups
just
in
free_hot_cold_page()
Hugh
Thanks for the detailed review and fixes.
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Balbir Singh
Linux Technology Center
IBM, ISTL
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Based on the recommendation and observations of Hugh Dickins,
page_cgroup_assign_cgroup() is not required. This patch replaces it with
a VM_BUG_ON, so that we can catch them in free_hot_cold_page()
Signed-off-by: Balbir Singh [EMAIL PROTECTED]
---
mm/page_alloc.c |2 +-
1 file changed, 1
Hugh Dickins noticed that we were using rcu_dereference() without
rcu_read_lock() in the cache charging routine. The patch below fixes
this problem
Signed-off-by: Balbir Singh [EMAIL PROTECTED]
---
mm/memcontrol.c | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff -puN
corrected and do not have any objections.
I was going to say the same thing, page_get_page_cgroup() does not hold
any references. May be _get_ in the name is confusing.
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Warm Regards,
Balbir Singh
Linux Technology Center
IBM, ISTL
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