On 2019/5/10 上午11:19, kernel test robot wrote:
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: ddf30cf03fb53b9a0ad0f355a69dbedf416edde9 ("btrfs: extent-tree: Use
> btrfs_ref to refactor add_pinned_bytes()")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
Thanks for the info.
This explains why I have some unexpected ENOSPC error.
The cause is pretty aweful.
The offending patch relies completely btrfs_ref, but forgot that pinned
bytes can be minus, thus causing strange behavior.
I'll fix it soon.
Thanks for reporting again,
Qu
>
> in testcase: xfstests
> with following parameters:
>
> disk: 4HDD
> fs: btrfs
> test: generic-quick2
>
> test-description: xfstests is a regression test suite for xfs and other files
> ystems.
> test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
>
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>
>
> FSTYP -- btrfs
> PLATFORM -- Linux/x86_64 vm-snb-4G-727 5.1.0-rc7-00188-gddf30cf
> MKFS_OPTIONS -- /dev/vdb
> MOUNT_OPTIONS -- /dev/vdb /fs/scratch
>
> generic/088 2s
> generic/089 14s
> generic/090 1s
> generic/091 19s
> generic/092 3s
> generic/098 4s
> generic/100 18s
> generic/101 0s
> generic/102- output mismatch (see
> /lkp/benchmarks/xfstests/results//generic/102.out.bad)
> --- tests/generic/102.out2019-05-09 15:46:08.000000000 +0800
> +++ /lkp/benchmarks/xfstests/results//generic/102.out.bad2019-05-10
> 09:32:39.267250059 +0800
> @@ -1,21 +1,21 @@
> QA output created by 102
> wrote 838860800/838860800 bytes at offset 0
> XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -wrote 838860800/838860800 bytes at offset 0
> +wrote 109576192/838860800 bytes at offset 0
> XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> wrote 838860800/838860800 bytes at offset 0
> ...
> (Run 'diff -u /lkp/benchmarks/xfstests/tests/generic/102.out
> /lkp/benchmarks/xfstests/results//generic/102.out.bad' to see the entire
> diff)
> generic/103 1s
> generic/104 1s
> generic/105 0s
> generic/106 1s
> generic/107 1s
> generic/109 1s
> generic/120 16s
> generic/123 1s
> generic/124 4s
> generic/126 1s
> generic/129 6s
> generic/130 13s
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <rong.a.c...@intel.com>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.1.0-rc7-00188-gddf30cf .config
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage
>
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
> bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is
> attached in this email
>
>
>
>
> Thanks,
> Rong Chen
>
