>From 4d52438c9640e64203c2434a74e2abfe3a4168ec Mon Sep 17 00:00:00 2001
From: Manish Sharma
Date: Thu, 4 Apr 2013 10:32:08 +0530
Subject: [PATCH] zram percpu implementation
This patch will create a percpu structures compression algo.
1. Takes extra memory for workspace buffers.
I haven't seen any
that (we are not sending any signal
to the task so it will remain in the wait_queue)
2. we call a wake_up () call.
otherwise there is no point in putting the task in run queue which has
nothing to do.
Thanks,
Mani
On Tue, Apr 17, 2012 at 6:16 PM, Philipp Ittershagen <
p.ittersha...@googlemail
d by the scheduler.
If YES, then why it is needed to schedule task in TASK_INTERRUPTIBLE state ?
What is the significance of the task->switch_count in the scheduler ?
surely it got updated for the TASK_INTERRUPTIBLE task.
[kernel/hung_task.c]check_hung_task()
Thanks
Mani
On Tue, Apr 17, 2012 at
Hi All,
How kernel scheduler treats task's TASK_UNINTERRUPTIBLE &
TASK_INTERREPTIBLE states ?
Actually in my case i have created a kernel thread and it is waiting on an
event as per below :-
wait_event(queue, flag);
in the above condition it gives me hung task timeout dump as it puts the
task i
Hi,
I also didnt get any good doc on the mmc sub system
whereas there are few things that might help
A slide which explains driver stack:-
http://www.slideshare.net/champ_yen/linux-sdmmc-driver-stack
Check JEDEC specs (open standard for MMC /eMMC)
http://www.jedec.org/sites/default/files/docs/JES
if you wanna open a block device specificallyy
you can look into fs/block_dev.c
struct block_device *open_bdev_exclusive(const char *path, fmode_t mode,
void *holder)
Also i think if you are interested in reading the first sector
then you can probably check the block/genhd.c file
get the disk (i.
Hi all,
Is there any way to find out the type of the connected USB disk (Hard
disk/SDD)?
AFAIK there is a significant performance difference in Harddisk/SDD devices.
Previously i though that the rotational flag in the sysfs will distinguish
them but it is same for both the types
#cat /sys/block
g the same hard disk with same disk block size ?
On Sat, Aug 6, 2011 at 9:51 PM, mani wrote:
> Dear Ashish,
>
> The ls uses st_size while du uses st_blocks.
> try using the ls -ls it will give you both the o/p's .
>
> Thanks
> Manish
>
> On Fri, Aug 5, 2011 at 7:
Dear Ashish,
The ls uses st_size while du uses st_blocks.
try using the ls -ls it will give you both the o/p's .
Thanks
Manish
On Fri, Aug 5, 2011 at 7:45 AM, Ashish Sangwan wrote:
> I write 1 program to create sparse file which contains alternate empty
> blocks and data blocks. For example blo
Dear All,
Any suggestions on the below point ?
Thanks in advance..
On Mon, May 30, 2011 at 10:53 AM, mani wrote:
> Dear Eduardo,
>
>I am using squashfs filesystem. So i am more concern with the read
> speed.
> whereas below
adverse effect anywhere
?
Thanks.
On Fri, May 27, 2011 at 8:37 PM, Eduardo Silva wrote:
> On Fri, May 27, 2011 at 8:29 AM, mani wrote:
> >
> > Dear All,
> >
> > I am working on linux kernel 2.6.32.9 tegra NVIDIA board.
> >
> > I am getting ~8MBps
);
}
changed ELEVATOR_INSERT_SORT to ELEVATOR_INSERT_BACK
it improves my NAND speed to 10MBps.
I am using "noop" I/O scheduler.
Will this change have any adverse effect in kernel ? or any other side
effect as far as i am using only Nand no Hard disk.
T
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