On 21/02/11 12:40 -0800, Sukadev Bhattiprolu wrote:
Louis Rilling [louis.rill...@kerlabs.com] wrote:
| But in 2.6.32 i.e RHEL5, tsk-signal is set to NULL in __exit_signal().
| So, I am trying to rule out the following scenario:
|
|Child (may not be a ghost) Parent
Currently the blkio.throttle controller only support synchronous IO requests.
This means that we always look at the current task to identify the owner of
each IO request.
However dirty pages in the page cache can be wrote to disk asynchronously by
the per-bdi flusher kernel threads or by any
Move blk-cgroup.h in include/linux for generic usage.
Signed-off-by: Andrea Righi ari...@develer.com
---
block/blk-cgroup.c |2 +-
block/blk-cgroup.h | 335 ---
block/blk-throttle.c |2 +-
block/cfq.h|2 +-
Introduce a helper function to retrieve a blkio cgroup from a task.
Signed-off-by: Andrea Righi ari...@develer.com
---
block/blk-cgroup.c |7 +++
include/linux/blk-cgroup.h |4
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/block/blk-cgroup.c
Add the tracking of buffered (writeback) and anonymous pages.
Dirty pages in the page cache can be processed asynchronously by the
per-bdi flusher kernel threads or by any other thread in the system,
according to the writeback policy.
For this reason the real writes to the underlying block
On Tue, Feb 22, 2011 at 06:12:51PM +0100, Andrea Righi wrote:
Currently the blkio.throttle controller only support synchronous IO requests.
This means that we always look at the current task to identify the owner of
each IO request.
However dirty pages in the page cache can be wrote to disk
If we are doing a self-checkpoint, we will not be frozen and the
get_freezer_task() will return NULL. If we have children, then
may_checkpoint_task() will attempt to make sure that they are in the
same cgroup as the freezer task, which will attempt to lock a NULL
task pointer (and thus go boom).
On Tue, Feb 22, 2011 at 10:42:41AM -0800, Chad Talbott wrote:
On Tue, Feb 22, 2011 at 9:12 AM, Andrea Righi ari...@develer.com wrote:
Add the tracking of buffered (writeback) and anonymous pages.
...
---
block/blk-throttle.c | 87
+++-
On Tue, 22 Feb 2011 18:12:54 +0100
Andrea Righi ari...@develer.com wrote:
The page_cgroup infrastructure, currently available only for the memory
cgroup controller, can be used to store the owner of each page and
opportunely track the writeback IO. This information is encoded in
the upper
On Tue, Feb 22, 2011 at 10:42:41AM -0800, Chad Talbott wrote:
On Tue, Feb 22, 2011 at 9:12 AM, Andrea Righi ari...@develer.com wrote:
Add the tracking of buffered (writeback) and anonymous pages.
...
---
block/blk-throttle.c | 87
+++-
On Tue, Feb 22, 2011 at 06:12:54PM +0100, Andrea Righi wrote:
The page_cgroup infrastructure, currently available only for the memory
cgroup controller, can be used to store the owner of each page and
opportunely track the writeback IO. This information is encoded in
the upper 16-bits of the
On Tue, Feb 22, 2011 at 06:12:55PM +0100, Andrea Righi wrote:
Add the tracking of buffered (writeback) and anonymous pages.
Dirty pages in the page cache can be processed asynchronously by the
per-bdi flusher kernel threads or by any other thread in the system,
according to the writeback
On Tue, Feb 22, 2011 at 01:01:45PM -0700, Jonathan Corbet wrote:
On Tue, 22 Feb 2011 18:12:54 +0100
Andrea Righi ari...@develer.com wrote:
The page_cgroup infrastructure, currently available only for the memory
cgroup controller, can be used to store the owner of each page and
On Tue, Feb 22, 2011 at 02:34:03PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 06:12:51PM +0100, Andrea Righi wrote:
Currently the blkio.throttle controller only support synchronous IO
requests.
This means that we always look at the current task to identify the owner
of
each IO
On Tue, Feb 22, 2011 at 01:01:45PM -0700, Jonathan Corbet wrote:
On Tue, 22 Feb 2011 18:12:54 +0100
Andrea Righi ari...@develer.com wrote:
The page_cgroup infrastructure, currently available only for the memory
cgroup controller, can be used to store the owner of each page and
On Tue, Feb 22, 2011 at 03:49:28PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 10:42:41AM -0800, Chad Talbott wrote:
On Tue, Feb 22, 2011 at 9:12 AM, Andrea Righi ari...@develer.com wrote:
Add the tracking of buffered (writeback) and anonymous pages.
...
---
On Tue, Feb 22, 2011 at 04:22:53PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 06:12:54PM +0100, Andrea Righi wrote:
The page_cgroup infrastructure, currently available only for the memory
cgroup controller, can be used to store the owner of each page and
opportunely track the
On Tue, Feb 22, 2011 at 04:00:30PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 06:12:55PM +0100, Andrea Righi wrote:
Add the tracking of buffered (writeback) and anonymous pages.
Dirty pages in the page cache can be processed asynchronously by the
per-bdi flusher kernel threads or
On Wed, 23 Feb 2011 00:01:47 +0100
Andrea Righi ari...@develer.com wrote:
My immediate observation is that you're not really tracking the owner
here - you're tracking an opaque 16-bit token known only to the block
controller in a field which - if changed by anybody other than the block
On Tue, Feb 22, 2011 at 04:27:29PM -0700, Jonathan Corbet wrote:
On Wed, 23 Feb 2011 00:01:47 +0100
Andrea Righi ari...@develer.com wrote:
My immediate observation is that you're not really tracking the owner
here - you're tracking an opaque 16-bit token known only to the block
On Wed, Feb 23, 2011 at 12:05:34AM +0100, Andrea Righi wrote:
On Tue, Feb 22, 2011 at 04:00:30PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 06:12:55PM +0100, Andrea Righi wrote:
Add the tracking of buffered (writeback) and anonymous pages.
Dirty pages in the page cache can be
On Tue, Feb 22, 2011 at 06:06:30PM -0500, Vivek Goyal wrote:
On Wed, Feb 23, 2011 at 12:01:47AM +0100, Andrea Righi wrote:
On Tue, Feb 22, 2011 at 01:01:45PM -0700, Jonathan Corbet wrote:
On Tue, 22 Feb 2011 18:12:54 +0100
Andrea Righi ari...@develer.com wrote:
The page_cgroup
On Tue, Feb 22, 2011 at 11:41:41PM +0100, Andrea Righi wrote:
On Tue, Feb 22, 2011 at 02:34:03PM -0500, Vivek Goyal wrote:
On Tue, Feb 22, 2011 at 06:12:51PM +0100, Andrea Righi wrote:
Currently the blkio.throttle controller only support synchronous IO
requests.
This means that we
On Wed, 23 Feb 2011 00:37:18 +0100
Andrea Righi ari...@develer.com wrote:
On Tue, Feb 22, 2011 at 06:06:30PM -0500, Vivek Goyal wrote:
On Wed, Feb 23, 2011 at 12:01:47AM +0100, Andrea Righi wrote:
On Tue, Feb 22, 2011 at 01:01:45PM -0700, Jonathan Corbet wrote:
On Tue, 22 Feb 2011
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