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Subject: Re: [PATCH V3 07/15] arch/kunmap_atomic: Consolidate duplicate code
To:     Ira Weiny <ira.weiny@intel.com>
Cc:     linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Christoph Hellwig <hch@lst.de>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Helge Deller <deller@gmx.de>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        "David S. Miller" <davem@davemloft.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Chris Zankel <chris@zankel.net>,
        Max Filippov <jcmvbkbc@gmail.com>,
        Dan Williams <dan.j.williams@intel.com>,
        linux-snps-arc@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
        linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org,
        linux-xtensa@linux-xtensa.org, dri-devel@lists.freedesktop.org,
        Christian Koenig <christian.koenig@amd.com>,
        Al Viro <viro@zeniv.linux.org.uk>
References: <20200507150004.1423069-1-ira.weiny@intel.com>
 <20200507150004.1423069-8-ira.weiny@intel.com>
 <20200516223306.GA161252@roeck-us.net>
 <20200518034938.GA3023182@iweiny-DESK2.sc.intel.com>
 <20200518042932.GA59205@roeck-us.net>
 <20200519000352.GF3025231@iweiny-DESK2.sc.intel.com>
From:   Guenter Roeck <linux@roeck-us.net>
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Message-ID: <47757f51-15f2-3abe-9035-abdb3ba5816e@roeck-us.net>
Date:   Mon, 18 May 2020 19:50:36 -0700
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Hi Ira,

On 5/18/20 5:03 PM, Ira Weiny wrote:
> On Sun, May 17, 2020 at 09:29:32PM -0700, Guenter Roeck wrote:
>> On Sun, May 17, 2020 at 08:49:39PM -0700, Ira Weiny wrote:
>>> On Sat, May 16, 2020 at 03:33:06PM -0700, Guenter Roeck wrote:
>>>> On Thu, May 07, 2020 at 07:59:55AM -0700, ira.weiny@intel.com wrote:
>>>>> From: Ira Weiny <ira.weiny@intel.com>
>>>>>
>>>>> Every single architecture (including !CONFIG_HIGHMEM) calls...
>>>>>
>>>>> 	pagefault_enable();
>>>>> 	preempt_enable();
>>>>>
>>>>> ... before returning from __kunmap_atomic().  Lift this code into the
>>>>> kunmap_atomic() macro.
>>>>>
>>>>> While we are at it rename __kunmap_atomic() to kunmap_atomic_high() to
>>>>> be consistent.
>>>>>
>>>>> Reviewed-by: Christoph Hellwig <hch@lst.de>
>>>>> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
>>>>
>>>> This patch results in:
>>>>
>>>> Starting init: /bin/sh exists but couldn't execute it (error -14)
>>>>
>>>> when trying to boot microblazeel:petalogix-ml605 in qemu.
>>>
>>> Thanks for the report.  I'm not readily seeing the issue.
>>>
>>> Do you have a kernel config?  Specifically is CONFIG_HIGHMEM set?
>>>
>> See below. Yes, CONFIG_HIGHMEM is set.
>>
>> The scripts used to build and boot the image are at:
>>
>> https://github.com/groeck/linux-build-test/tree/master/rootfs/microblazeel
> 
> Despite finding the obvious error earlier today I've still been trying to get
> this to work.
> 
> I had to make some slight modifications to use the 0-day cross compile build
> and my local qemu build.  But those were pretty minor modifications.  I'm
> running on x86_64 host.
> 
> With those slight mods to the scripts I get the following error even without my
> patch set on 5.7-rc4.  I have 1 cpu pegged at 100% while it is running...  Is
> there anything I can do to get more debug output?  Perhaps I just need to let
> it run longer?
> 

I don't think so. Try running it with "-d" parameter (run-qemu-microblazeel.sh
-d petalogix-s3adsp1800); that gives you the qemu command line. Once it says
"running", abort the script and execute qemu directly. Oh, and please update
the repository; turns out I didn't push for a while and made a number of
changes.

My compiler was compiled with buildroot (a long time ago). I don't recall if
it needed something special in the configuration, unfortunately.

Guenter

> Thanks,
> Ira
> 
> 16:46:54 > ../linux-build-test/rootfs/microblazeel/run-qemu-microblazeel.sh 
> Build reference: v5.7-rc4-2-g7c2411d7fb6a
> 
> Building microblaze:petalogix-s3adsp1800:qemu_microblazeel_defconfig ...
> running ................ failed (silent)
> ------------
> qemu log:
> qemu-system-microblazeel: terminating on signal 15 from pid 3277686 (/bin/bash)
> ------------
> Building microblaze:petalogix-ml605:qemu_microblazeel_ml605_defconfig ...
> running ................ failed (silent)
> ------------
> qemu log:
> qemu-system-microblazeel: terminating on signal 15 from pid 3277686 (/bin/bash)
> ------------
> 
> <env changes>
> 16:47:23 > git di
> diff --git a/rootfs/microblazeel/run-qemu-microblazeel.sh b/rootfs/microblazeel/run-qemu-microblazeel.sh
> index 68d4de39ab50..0d6a4f85308f 100755
> --- a/rootfs/microblazeel/run-qemu-microblazeel.sh
> +++ b/rootfs/microblazeel/run-qemu-microblazeel.sh
> @@ -3,7 +3,8 @@
>  dir=$(cd $(dirname $0); pwd)
>  . ${dir}/../scripts/common.sh
>  
> -QEMU=${QEMU:-${QEMU_BIN}/qemu-system-microblazeel}
> +#QEMU=${QEMU:-${QEMU_BIN}/qemu-system-microblazeel}
> +QEMU=/home/iweiny/dev/qemu/microblazeel-softmmu/qemu-system-microblazeel
>  PREFIX=microblazeel-linux-
>  ARCH=microblaze
>  PATH_MICROBLAZE=/opt/kernel/microblazeel/gcc-4.9.1/usr/bin
> diff --git a/rootfs/scripts/common.sh b/rootfs/scripts/common.sh
> index 8fa6a9be2b2f..c4550a27beaa 100644
> --- a/rootfs/scripts/common.sh
> +++ b/rootfs/scripts/common.sh
> @@ -1,5 +1,9 @@
>  #!/bin/bash
>  
> +# Set up make.cross
> +export COMPILER_INSTALL_PATH=$HOME/0day
> +export GCC_VERSION=6.5.0
> +
>  # Set the following variable to true to skip DC395/AM53C97 build tests
>  __skip_dc395=0
>  
> @@ -569,7 +573,7 @@ doclean()
>         then
>                 git clean -x -d -f -q
>         else
> -               make ARCH=${ARCH} mrproper >/dev/null 2>&1
> +               make.cross ARCH=${ARCH} mrproper >/dev/null 2>&1
>         fi
>  }
>  
> @@ -669,7 +673,7 @@ __setup_config()
>         cp ${__progdir}/${defconfig} arch/${arch}/configs
>      fi
>  
> -    if ! make ARCH=${ARCH} CROSS_COMPILE=${PREFIX} ${defconfig} >/dev/null 2>&1 </dev/null; then
> +    if ! make.cross ARCH=${ARCH} ${defconfig} >/dev/null 2>&1 </dev/null; then
>         return 2
>      fi
>  
> @@ -687,7 +691,7 @@ __setup_config()
>         if [[ "${rel}" = "v3.16" ]]; then
>             target="oldconfig"
>         fi
> -       if ! make ARCH=${ARCH} CROSS_COMPILE=${PREFIX} ${target} >/dev/null 2>&1 </dev/null; then
> +       if ! make.cross ARCH=${ARCH} ${target} >/dev/null 2>&1 </dev/null; then
>             return 1
>         fi
>      fi
> @@ -1038,7 +1042,7 @@ dosetup()
>      rootfs="$(setup_rootfs ${dynamic} ${rootfs})"
>      __common_fixups "${fixups}" "${rootfs}"
>  
> -    make -j${maxload} ARCH=${ARCH} CROSS_COMPILE=${PREFIX} ${EXTRAS} </dev/null >/dev/null 2>${logfile}
> +    make.cross -j${maxload} ARCH=${ARCH} ${EXTRAS} </dev/null >/dev/null 2>${logfile}
>      rv=$?
>      if [ ${rv} -ne 0 ]
>      then
> 
> </env changes>
>