a. I would suggest you look at uevents. They are used in android for
various purposes. You can see them being used in vold to know when disks
are added.
You could also look in to the netlink API, which can give a duplex
channel between userland and kernel. There are various other options
(e
On 04/02/12 04:55, rong wrote:
It looks to me that something either needs to wake up the idle cpu when
an rcu callback is scheduled on it (I couldnt figure out how to do
that), or it should not be scheduled on a completely idle cpu as this
cpu is already in a quiescent state.
While there are oth
Hello,
Does anyone reading this list know much about the rcu subsystem?
I have been debugging a problem with unmounting disks. Occasionally when
unmounting an ext4 filesystem, the whole system would freeze.
I traced this to it waiting for completion on an rcu_barrier.
After lots of debugging,
, Aug 30, 2011 at 6:28 AM, Robert Beckett
mailto:robert.beck...@ziilabs.com>> wrote:
You would only get a race condition if the suspend code is
contending the same lock as the thread. Unlikely if there is no
locking.
The kernel does not stop kthreads when suspending.
You would only get a race condition if the suspend code is contending
the same lock as the thread. Unlikely if there is no locking.
The kernel does not stop kthreads when suspending.
Each kthread that runs a main loop should call try_to_freeze() in its
main loop. This will let it detect the sus
Hi,
I have been debugging why our device will often abort a suspend.
I tracked it down to the following sequence :
1. Alarm type 3 (ELAPSED_REALTIME) is scheduled
2. The alarm is triggered
3. Shortly after, the system is going down for a suspend
4. The wakelock driver aborts the suspend with -EA
int pid_n = pid_nr(task_pid(current));
On 22/02/11 08:37, Footballer wrote:
Hi fork,
I'm now porting the Android to a processor core. Once the zygote is
up, the processor trigger an illegal exception. It means that there is
a wrong instruction is executed by the processor. I checked the
program
if it is static data, that isnt going to change, then I would do that as
a firmware binary blob.
You can put the data in a file, and use the firmware_class functionality
to get it from userland in to the kernel.
e.g.
struct firmware * fw;
request_firmware(&fs, ", );
The data from the file is
Hi,
I assume that you are referring to a proprietary licensed module that is
not built in to the kernel.
If this is the case, you wont be able to use any of the
EXPORT_SYMBOL_GPL functions, so that rules out /sys.
I would use /proc to export the data to userland.
Regards
Bob
On 21/01/11 11
Hi,
In porting android to our A8 cortext based board, we have enabled TLS.
This works fine with bionic in general, however, it seems to cause
problems with gdbserver.
Looking at the gdbserver source, it tries to get an address for
td_thr_tls_get_addr, which is not implemented in bionics threa
If you look at how the wifi drivers get loaded, you can see that they
load them via
hardware/libhardware_legacy/wifi/wifi.c which is called from a jni that
the framework uses.
You can follow a similar route.
A simpler alternative that I use is to write a script to load the module
and set a pr
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