[Xenomai-help] Scheduling while atomic

Tue, 17 Jan 2006 06:17:33 -0800

Gilles, Jan,
 
 
The offending program is quite complex (several .c files and a considerable .h file tree) and involves 2 computers. However, I think I can narrow down the problem to concurrent access (from 2 Xenomai threads in 2nd domain) to the same Linux file descriptor for a TCP/IP connection.
 
In order to rule this out, I have put RT_MUTEXes around the send() and recv() calls.However, I still received 'scheduling while atomic'. Further investigation, however, has shown that the mutexes seem to fail: rt_mutex_enquire() returns 0 or even -1 after acquisition of the lock. With this program, I didn't (yet) receive the 'scheduling...' error, but by increasing the task repetition rate, it should be a matter of (a long) time (both tasks arriving at a blocking write).
 
I have compiled a program that represents the structure of the original program. Could you have a look and see if I'm not making a mistake here ?
 
For proper following up, I've also attached the dmesg log asked for earlier by Jan.
 

/* TEST_MUTEX.C */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <math.h>

#include <native/task.h>
#include <native/mutex.h>
#include <native/sem.h>

int fd, err;
RT_MUTEX m;
RT_SEM s;

#define CHECK(arg) check(arg, __LINE__)

int check(int r, int n)
{
    if (r != 0)
        fprintf(stderr, "L%d: %s.\n", n, strerror(-r));
    return(r);
}

void output(char c) {
    static int cnt = 0;
    int n;
    char buf[2];
    RT_MUTEX_INFO mutexinfo;
   
    buf[0] = c;
   
    if (cnt == 80) {
        buf[1] = '\n';
        n = 2;
        cnt = 0;
    }
    else {
        n = 1;
        cnt++;
    }
   
    CHECK(rt_mutex_inquire(&m, &mutexinfo));
    if (mutexinfo.lockcnt <= 0) {
        RT_TASK_INFO taskinfo;
        CHECK(rt_task_inquire(NULL, &taskinfo));
        fprintf(stderr, "ALERT: No lock! (lockcnt=%d) Offending task: %s\n",
                mutexinfo.lockcnt, taskinfo.name );
    }
   
    if (write(fd, buf, n) != n) {
        fprintf(stderr, "File write error.\n");
        CHECK(rt_sem_v(&s));
    }
}

void task0(void *arg)
{
    while (1) {
        CHECK(rt_task_sleep((float)rand()*1.0e7/(float)RAND_MAX));
        CHECK(rt_mutex_lock(&m, TM_INFINITE));
        output('0');
        CHECK(rt_mutex_unlock(&m));
    }
}

void task1(void *arg)
{
    while (1) {
        CHECK(rt_task_sleep((float)rand()*1.0e7/(float)RAND_MAX));
        CHECK(rt_mutex_lock(&m, TM_INFINITE));
        output('1');
        CHECK(rt_mutex_unlock(&m));
    }
}

void sighandler(int arg)
{
    CHECK(rt_sem_v(&s));
}

int main(int argc, char *argv[])
{
    RT_TASK t, t0, t1;
   
    if ((fd = open("dump.txt", O_CREAT | O_RDWR)) < 0)
        fprintf(stderr, "File open error.\n");
    else {
        CHECK(rt_timer_start(TM_ONESHOT));
       
        CHECK(rt_mutex_create(&m, "mutex"));
        CHECK(rt_sem_create(&s, "sem", 0, S_PRIO));

        signal(SIGINT, sighandler);
       
        CHECK(rt_task_create(&t0, "task0", 0, 30, T_FPU));
        CHECK(rt_task_start(&t0, task0, NULL));
        CHECK(rt_task_create(&t1, "task1", 0, 29, T_FPU));
        CHECK(rt_task_start(&t1, task1, NULL));
        CHECK(rt_task_shadow(&t, "main", 1, T_FPU));

        CHECK(rt_sem_p(&s, TM_INFINITE));
        signal(SIGINT, SIG_IGN);
       
        CHECK(rt_task_delete(&t1));
        CHECK(rt_task_delete(&t0));
       
        CHECK(rt_sem_delete(&s));
        CHECK(rt_mutex_delete(&m));
       
        rt_timer_stop();
       
        close(fd);
    }
    return 0;
}

Compiled with GCC 4.0.2:

gcc mtest.c -o mtest $(xeno-config --xeno-cflags) $(xeno-config ---xeno-ldflags)

 

Run on kernel 2.6.15, Adeos 1.1-03, Xenomai SVN rev. 462

 

dmesg output (usually not that long - the truncated first line is actually there - it is not the top of the dmesg log):

 
pe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
scheduling while atomic: ext_upload/0x00000002/12490
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0148ade>] ipipe_trace_end+0x35/0x37
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
note: ext_upload[12490] exited with preempt_count 2
scheduling while atomic: ext_upload/0x00000002/12661
 [<c03b4c64>] schedule+0x4b4/0x790
 [<c011a0ca>] __wake_up_sync+0x67/0xb8
 [<c0155455>] xnshadow_harden+0xc6/0xdd
 [<c0156c5b>] losyscall_event+0x8c/0x1c0
 [<c0147473>] __ipipe_dispatch_event+0x90/0x173
 [<c011697a>] __ipipe_syscall_root+0x36/0x110
 [<c0103434>] system_call+0x20/0x41
note: ext_upload[12661] exited with preempt_count 2
 

 

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