kernel-packages team mailing list archive

[Ming Lei <1469218@xxxxxxxxxxxxxxxxxx>]

For #5's log, the fault happened in the following code snippet of
kernel/sched/cputime.c:

                for_each_thread(tsk, t) {
ffffffc0000d3dc0:       f9445760        ldr     x0, [x27,#2216]
ffffffc0000d3dc4:       f8410c03        ldr     x3, [x0,#16]!
ffffffc0000d3dc8:       f90037a3        str     x3, [x29,#104]
ffffffc0000d3dcc:       f94037b4        ldr     x20, [x29,#104]
ffffffc0000d3dd0:       eb00029f        cmp     x20, x0
ffffffc0000d3dd4:       d10ee294        sub     x20, x20, #0x3b8
ffffffc0000d3dd8:       54000081        b.ne    ffffffc0000d3de8 <thread_group_cputime+0x90>
ffffffc0000d3ddc:       14000015        b       ffffffc0000d3e30 <thread_group_cputime+0xd8>
ffffffc0000d3de0:       f9400261        ldr     x1, [x19]
ffffffc0000d3de4:       f9400662        ldr     x2, [x19,#8]
                                cputime_t *utime, cputime_t *stime)
{
        if (utime)
                *utime = t->utime;
        if (stime)
                *stime = t->stime;
ffffffc0000d3de8:       f941f684        ldr     x4, [x20,#1000]      #fault instruction

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https://bugs.launchpad.net/bugs/1469218

Title:
  HP ProLiant m400 Server sda timeout causes file system hang

Status in linux package in Ubuntu:
  Triaged

Bug description:
  While running stress-ng on a ProLiant m400 Server I managed to cause
  the disk controller to timeout which causes a file system hang. I am
  wondering if the timeout was causes because I completely overloaded
  the system causing it to be slow on ata handling times.

  I ran:

  stress-ng --all 64 -t 600 -v

  and the machine slowly clogged up with stress processes, and finally
  hit the hang.  Had to reboot the system.

  Attached is a kernel log.

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