Messages in this thread | | | Date | Fri, 23 Jan 2015 18:44:58 -0800 | From | Guenter Roeck <> | Subject | Re: mmotm 2015-01-22-15-04: qemu failures due to 'mm: account pmd page tables to the process' |
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On 01/23/2015 01:55 PM, Andrew Morton wrote: > On Fri, 23 Jan 2015 07:07:56 -0800 Guenter Roeck <linux@roeck-us.net> wrote: > >>>> >>>> qemu:microblaze generates warnings to the console. >>>> >>>> WARNING: CPU: 0 PID: 32 at mm/mmap.c:2858 exit_mmap+0x184/0x1a4() >>>> >>>> with various call stacks. See >>>> http://server.roeck-us.net:8010/builders/qemu-microblaze-mmotm/builds/15/steps/qemubuildcommand/logs/stdio >>>> for details. >>> >>> Could you try patch below? Completely untested. >>> >>> >From b584bb8d493794f67484c0b57c161d61c02599bc Mon Sep 17 00:00:00 2001 >>> From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> >>> Date: Fri, 23 Jan 2015 13:08:26 +0200 >>> Subject: [PATCH] microblaze: define __PAGETABLE_PMD_FOLDED >>> >>> Microblaze uses custom implementation of PMD folding, but doesn't define >>> __PAGETABLE_PMD_FOLDED, which generic code expects to see. Let's fix it. >>> >>> Defining __PAGETABLE_PMD_FOLDED will drop out unused __pmd_alloc(). >>> It also fixes problems with recently-introduced pmd accounting. >>> >>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> >>> Reported-by: Guenter Roeck <linux@roeck-us.net> >> >> Tested working. >> >> Tested-by: Guenter Roeck <linux@roeck-us.net> >> >> Any idea how to fix the sh problem ? > > Can you tell us more about it? All I'm seeing is "qemu:sh fails to > shut down", which isn't very clear. >
qemu command line:
/opt/buildbot/bin/qemu-system-sh4 -M r2d -kernel ./arch/sh/boot/zImage \ -drive file=rootfs.ext2,if=ide \ -append "root=/dev/sda console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user -nographic -monitor null
-- Poweroff log in mainline (v3.19-rc5-119-gb942c65):
/ # poweroff The system is going down NOW! Sent SIGTERM to all processes Sent SIGKILL to all processes Requesting system poweroff sd 0:0:0:0: [sda] Synchronizing SCSI cache sd 0:0:0:0: [sda] Stopping disk reboot: Power down
-- Poweroff log in mmotm (v3.19-rc5-417-gc64429b):
/ # poweroff
[ nothing else happens until I kill the qemu session ]
The "halt" command does not work either.
-- The message "The system is going down NOW" is from the init process. If I use "kill -12 1" instead of "halt" or "poweroff", the system does shut down as expected. "poweroff -f" also works.
Trying to debug this further, I noticed that the "ps" command hangs as well, so the problem is not limited to poweroff or halt.
I'll be happy to debug this further, I just have no idea where to start.
Thanks, Guenter
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