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Date:   Thu, 24 Nov 2022 15:45:55 +0800
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From:   kernel test robot <yujie.liu@intel.com>
Subject: Re: [linux-next:master] [asm] 5e5ff73c2e: Initramfs_unpacking_failed
To:     Sai Prakash Ranjan <quic_saipraka@quicinc.com>
CC:     <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux Memory Management List <linux-mm@kvack.org>,
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Sorry for this false alarm. We found the root cause was due to a problem
in our testing environment, and it has been fixed now.

On 11/23/2022 17:25, kernel test robot wrote:
> Hi Sai,
> 
> We encountered an "Initramfs unpacking failed" issue when doing boot
> test on this patch. The patch is for printing accurate debug info under
> compiler optimization, looks totally unrelated with initramfs, but this
> issue is 100% reproducible in our tests. We confirmed that our rootfs
> image, kernel config and other environments were consistent during the
> testing. Could you please help check if this is a real problem or a
> false alarm? Thanks.
> 
> 
> Greeting,
> 
> FYI, we noticed Initramfs_unpacking_failed due to commit (built with gcc-11):
> 
> commit: 5e5ff73c2e5863f93fc5fd78d178cd8f2af12464 ("asm-generic/io: Add _RET_IP_ to MMIO trace for more accurate debug info")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> 
> in testcase: boot
> 
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> 
> [ 3.518862][ T1] initcall pci_apply_final_quirks+0x0/0x32c returned 0 after 10472 usecs
> [ 3.520299][ T1] calling acpi_reserve_resources+0x0/0x273 @ 1
> [ 3.521395][ T1] initcall acpi_reserve_resources+0x0/0x273 returned 0 after 61 usecs
> [ 3.522853][ T1] calling populate_rootfs+0x0/0x3c @ 1
> [    3.524393][   T25] Trying to unpack rootfs image as initramfs...
> [   30.185500][   T25] Initramfs unpacking failed: uncompression error   <--
> [   30.931793][   T25] Freeing initrd memory: 607016K
> [ 30.932869][ T1] initcall populate_rootfs+0x0/0x3c returned 0 after 27409026 usecs
> [ 30.934238][ T1] calling pci_iommu_init+0x0/0x55 @ 1
> [   30.935230][    T1] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
> [   30.936475][    T1] software IO TLB: mapped [mem 0x0000000096f16000-0x000000009af16000] (64MB)
> 
> 
> If you fix the issue, kindly add following tag
> | Reported-by: kernel test robot <yujie.liu@intel.com>
> | Link: https://lore.kernel.org/oe-lkp/202211231652.f67208c7-yujie.liu@intel.com
> 
> 
> To reproduce:
> 
>          # build kernel
> 	cd linux
> 	cp config-6.1.0-rc3-00002-g5e5ff73c2e58.old .config
> 	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
> 	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
> 	cd <mod-install-dir>
> 	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
> 
> 
>          git clone https://github.com/intel/lkp-tests.git
>          cd lkp-tests
>          bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
> 
>          # if come across any failure that blocks the test,
>          # please remove ~/.lkp and /lkp dir to run from a clean state.
> 
>