* FW: Page Allocation Failure, Why?? Bug in kernel??
@ 2006-06-01 9:37 Abu M. Muttalib
2006-06-01 10:03 ` Andrew Morton
0 siblings, 1 reply; 2+ messages in thread
From: Abu M. Muttalib @ 2006-06-01 9:37 UTC (permalink / raw)
To: linux-kernel
[-- Attachment #1: Type: text/plain, Size: 1751 bytes --]
Hi,
I tried to run an application, try-sound.c. In the course of the run of the
application I repeatedly got page allocation failure, despite the fact that
enough pages are free. Why this is so, is it a bug in mm subsystem of Linux
kernel 2.6.13?
The Page allocation failure is as follows:
insmod: page allocation failure. order:5, mode:0xd0
Mem-info:
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1 used:5
cpu 0 cold: low 0, high 2, batch 1 used:1
Normal per-cpu: empty
HighMem per-cpu: empty
Free pages: 944kB (0kB HighMem)
Active:1611 inactive:279 dirty:0 writeback:0 unstable:0 free:236 slab:483
mapped:1378 pagetables:43
DMA free:944kB min:512kB low:640kB high:768kB active:6444kB inactive:1116kB
present:16384kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB
pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB
present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 106*4kB 11*8kB 5*16kB 3*32kB 2*64kB 1*128kB 0*256kB 0*512kB 0*1024kB =
944kB
Normal: empty
HighMem: empty
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap = 0kB
Total swap = 0kB
Free swap: 0kB
4096 pages of RAM
450 free pages
593 reserved pages
483 slab pages
291 pages shared
0 pages swap cached
Before this failure the /proc/buddyinfo is as follows:
Node 0, zone DMA 43 5 5 3 2 2 0
0 0
After the failure the /proc/buddyinfo is as follows:
Node 0, zone DMA 77 13 5 3 2 2 0
0 0
Any pointer to help understand this behavior will be highly appreciated.
~Abu.
[-- Attachment #2: try-sound.c --]
[-- Type: application/octet-stream, Size: 7611 bytes --]
#include <stdio.h>
#include <malloc.h>
#include <fcntl.h>
// YoKu 20-10-04 for PMU
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
// YoKu
#define PAGES 900
#define SIGPAGE 4096
#define REFERESH 0
// LCD VDIG_1
#define LCD 2
// LCD_BACKLIGHT CURR1
#define LCD_BACKLIGHT 3
#define I2C_DEV "/dev/i2c-0" // I2C Device File
#define PMU_CHARGER "/dev/PMU_CHARGER"
#define WAVE_PIPE "/tmp/WAVE_PIPE"
#define PMU_ADDR 0x41 // PMU Write Address
#define POWER_CONTROL 9
#define ON 1
#define OFF 0
#define LCD_ON_MASK 0x04 // 0000 0100 POWER_CONTROL
#define LCD_BACKLIGHT_ON_MASK 0x04 // 0000 0100 CURR_CONTROL
#define CURR_CONTROL 40
#define CURR_MODE 41
int fdI2C;
unsigned char gbyLCDBackOn = 1;
fn_SwitchDev(unsigned char byDev, unsigned char byOp)
{
__s16 byPresent_val;
if ( byDev == LCD )
{
if( (byPresent_val = i2c_smbus_read_byte_data(fdI2C , POWER_CONTROL)) < 0)
{
perror("\nfn_SwitchDev: I2C POWER_CONTROL Read Fail") ;
}
else
{
if ( byOp == ON )
{
byPresent_val |= LCD_ON_MASK;
#ifdef MAIN_DEBUG
printf("\nPMU: Switching LCD ON");
#endif
}
else
{
byPresent_val &= ~LCD_ON_MASK;
#ifdef MAIN_DEBUG
printf("\nPMU: Switching LCD OFF");
#endif
}
if(i2c_smbus_write_byte_data( fdI2C, POWER_CONTROL, byPresent_val ) < 0)
{
perror("\nfn_SwitchDev: I2C POWER_CONTROL write Fail") ;
}
}
}
else if ( byDev == LCD_BACKLIGHT )
{
if( (byPresent_val = i2c_smbus_read_byte_data( fdI2C , CURR_CONTROL )) < 0)
{
perror("\nfn_SwitchDev: I2C CURR_CONTROL Read Fail") ;
}
else
{
//pthread_mutex_lock(&_mutgbyLCDBackOn);
if ( byOp == ON )
{
byPresent_val |= LCD_BACKLIGHT_ON_MASK;
#ifdef MAIN_DEBUG
printf("\nPMU: Switching LCD BACKLIGHT ON");
#endif
if(i2c_smbus_write_byte_data( fdI2C, CURR_CONTROL, byPresent_val ) < 0)
perror("\nfn_SwitchDev: I2C CURR_CONTROL write Fail") ;
else
gbyLCDBackOn = 1;
}
else
{
byPresent_val &= ~LCD_BACKLIGHT_ON_MASK;
#ifdef MAIN_DEBUG
printf("\nPMU: Switching LCD BACKLIGHT OFF");
#endif
if(i2c_smbus_write_byte_data( fdI2C, CURR_CONTROL, byPresent_val ) < 0)
perror("\nfn_SwitchDev: I2C CURR_CONTROL write Fail") ;
else
gbyLCDBackOn = 0;
}
//pthread_mutex_unlock(&_mutgbyLCDBackOn);
}
}
}
int main()
{
int i=-1;
static unsigned int cntr = 0 ;
char *poarray,*p2=NULL;
system("cat /proc/meminfo");
for (i=0;i<PAGES;i++)
{
poarray=(char*)malloc(SIGPAGE);
memset(poarray, '\0', SIGPAGE);
if(poarray==NULL)
{
printf("\nError in allocating\n");
exit(1);
}
}
if( (fdI2C = open(I2C_DEV,O_RDWR)) < 0 ) // Open I2C Device
{
perror("\nMAIN: Cannot open I2C device\n") ;
}
else
{
// Write 'PMU Write addr' to I2C Device
if (ioctl(fdI2C,I2C_SLAVE,PMU_ADDR) < 0)
{
perror("\nMAIN: I2C PMU_ADDR Write Fail");
}
printf("\nMAIN: I2C PMU_ADDR Write Success.fdI2c = %d" ,fdI2C );
}
fn_SwitchDev(LCD, 1);
fn_SwitchDev(LCD_BACKLIGHT, 1);
while(1)
{
cntr ++ ;
fn_SwitchDev(LCD_BACKLIGHT, 0);
printf("\nREMOVING MODULES Ittr=%d \n" , cntr);
sleep(REFERESH);
system("cat /proc/meminfo");
system("cat /proc/buddyinfo");
sleep(REFERESH);
system("rmmod snd-pcm-oss");
sleep(REFERESH);
system("cat /proc/meminfo");
system("cat /proc/buddyinfo");
sleep(REFERESH);
system("rmmod snd-mixer-oss");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-pxa2xx-ac97");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-pxa2xx-pcm");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-ac97-codec");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-pcm");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-page-alloc");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd-timer");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod snd");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("rmmod soundcore");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
sleep(2);
fn_SwitchDev(LCD_BACKLIGHT, 1);
p2=(char*)malloc(100);
if(p2 == NULL)
{
printf("OOM PROBLEM");
}
system("lsmod");
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
// system("echo 150 >/proc/sys/pm/suspend");
system("cat /proc/meminfo");
printf("\nInserting Modules\n");
system("/sbin/insmod /lib/modules/2.6.13/alsa/soundcore.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-timer.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-page-alloc.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-pcm.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-ac97-codec.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-pxa2xx-pcm.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-pxa2xx-ac97.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-mixer-oss.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
sleep(REFERESH);
system("/sbin/insmod /lib/modules/2.6.13/alsa/snd-pcm-oss.ko");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("rmmod linuxdrv");
sleep(REFERESH);
system("cat /proc/buddyinfo");
system("cat /proc/meminfo");
system("/sbin/insmod /root/linuxdrv.ko");
system("cat /proc/meminfo");
system("lsmod");
system("cat /proc/buddyinfo");
sleep(REFERESH);
free(p2);
p2 = NULL;
}
}
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: FW: Page Allocation Failure, Why?? Bug in kernel??
2006-06-01 9:37 FW: Page Allocation Failure, Why?? Bug in kernel?? Abu M. Muttalib
@ 2006-06-01 10:03 ` Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2006-06-01 10:03 UTC (permalink / raw)
To: Abu M. Muttalib; +Cc: linux-kernel
On Thu, 1 Jun 2006 15:07:09 +0530
"Abu M. Muttalib" <abum@aftek.com> wrote:
> I tried to run an application, try-sound.c. In the course of the run of the
> application I repeatedly got page allocation failure, despite the fact that
> enough pages are free. Why this is so, is it a bug in mm subsystem of Linux
> kernel 2.6.13?
>
> The Page allocation failure is as follows:
>
> insmod: page allocation failure. order:5, mode:0xd0
We don't have a snowball's chance of allocating 32 physically-contiguous
pages.
What sound driver?
Did it actually work OK, or was there userspace-visible failure?
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2006-06-01 9:59 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-06-01 9:37 FW: Page Allocation Failure, Why?? Bug in kernel?? Abu M. Muttalib
2006-06-01 10:03 ` Andrew Morton
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®