On Tue 03-03-20 14:15:24, Naresh Kamboju wrote: > [Sorry for the spam] > > Linux-next 5.6.0-rc3-next-20200302 running on arm64 juno-r2 device while > running LTP syscalls chown tests. > > Suspecting commits are (did not do git bisect), > b1473d5f3d0 fs/buffer.c: dump more info for __getblk_gfp() stall problem > b10a7ae6565 fs/buffer.c: add debug print for __getblk_gfp() stall problem These are almost certainly unrelated. If I'm looking right, the warning is coming from memalloc_use_memcg() called from alloc_page_buffers() complaining that memcg to charge is already set. But I don't see how that would be possible (at least with today's linux-next). Can you reproduce the problem with today's linux-next? Honza > > steps to reproduce: > ------------------- > - Boot kernel Linux-next 5.6.0-rc3-next-20200302 on arm64 device > - cd /opt/ltp > - ./runltp -s chown -I 10 -d /scratch -p -q > > * /scratch is a mounted hard drive for LTP test files. > > chown03_16 2 TCONF : > /usr/src/debug/ltp/20190930-r0/git/testcases/kernel/syscalls/chown/../utils/compat_16.h:168: > Remaining cases not appropriate for configuration > mke2fs 1.43.8 (1-Jan-2018) > [ 97.998689] ------------[ cut here ]------------ > [ 98.003346] WARNING: CPU: 2 PID: 340 at > include/linux/sched/mm.h:323 alloc_page_buffers+0x210/0x288 > [ 98.012409] Modules linked in: rfkill tda998x cec drm_kms_helper > drm crct10dif_ce fuse > [ 98.020369] CPU: 2 PID: 340 Comm: kworker/u12:6 Not tainted > 5.6.0-rc3-next-20200302 #1 > [ 98.028302] Hardware name: ARM Juno development board (r2) (DT) > [ 98.034242] Workqueue: loop0 loop_workfn > [ 98.038176] pstate: 60000005 (nZCv daif -PAN -UAO) > [ 98.042980] pc : alloc_page_buffers+0x210/0x288 > [ 98.047522] lr : alloc_page_buffers+0x50/0x288 > [ 98.051972] sp : ffff000904a76c00 > [ 98.055291] x29: ffff000904a76c00 x28: ffff000900126000 > [ 98.060617] x27: ffff0008e0ad0888 x26: ffffffe001ff3908 > [ 98.065941] x25: 0000000000408c40 x24: ffffffe001ff3900 > [ 98.071265] x23: 0000000000000401 x22: ffff0008e0ad0780 > [ 98.076589] x21: 0000000000001000 x20: 0000000000000000 > [ 98.081913] x19: ffff0009022fd980 x18: 0000000000000000 > [ 98.087236] x17: 0000000000000000 x16: 0000000000000000 > [ 98.092559] x15: 0000000000000000 x14: ffffa00010468954 > [ 98.097883] x13: ffffa00010259490 x12: ffff9ffc003fe727 > [ 98.103207] x11: 1ffffffc003fe726 x10: ffff9ffc003fe726 > [ 98.108531] x9 : dfffa00000000000 x8 : 0000000000000001 > [ 98.113855] x7 : ffffffe001ff3937 x6 : ffffffe001ff3934 > [ 98.119179] x5 : 00006003ffc018da x4 : 000000000000002d > [ 98.124503] x3 : dfffa00000000000 x2 : 0000000000000007 > [ 98.129826] x1 : ffff0009022fe300 x0 : ffff000900126000 > [ 98.135150] Call trace: > [ 98.137605] alloc_page_buffers+0x210/0x288 > [ 98.141799] __getblk_gfp+0x1d4/0x400 > [ 98.145475] ext4_read_block_bitmap_nowait+0x148/0xbc8 > [ 98.150628] ext4_mb_init_cache+0x25c/0x9b0 > [ 98.154821] ext4_mb_init_group+0x270/0x390 > [ 98.159014] ext4_mb_good_group+0x264/0x270 > [ 98.163208] ext4_mb_regular_allocator+0x480/0x798 > [ 98.168011] ext4_mb_new_blocks+0x958/0x10f8 > [ 98.172294] ext4_ext_map_blocks+0xec8/0x1618 > [ 98.176660] ext4_map_blocks+0x1b8/0x8a0 > [ 98.180592] ext4_writepages+0x830/0xf10 > [ 98.184523] do_writepages+0xb4/0x198 > [ 98.188195] __filemap_fdatawrite_range+0x170/0x1c8 > [ 98.193086] filemap_write_and_wait_range+0x40/0xb0 > [ 98.197974] ext4_punch_hole+0x4a4/0x660 > [ 98.201907] ext4_fallocate+0x294/0x1190 > [ 98.205839] loop_process_work+0x690/0x1100 > [ 98.210032] loop_workfn+0x2c/0x110 > [ 98.213529] process_one_work+0x3e0/0x648 > [ 98.217546] worker_thread+0x70/0x670 > [ 98.221217] kthread+0x1b8/0x1c0 > [ 98.224452] ret_from_fork+0x10/0x18 > [ 98.228033] ---[ end trace 75d39f61d945043e ]--- > chown04 0 TINFO : Using test device LTP_DEV='/dev/loop0' > chown04 0 TINFO : Formatting /dev/loop0 with ext2 opts='' extra opts='' > chown04 1 TPASS : chown failed: TEST_ERRNO=EPERM(1): Operation > not permitted > chown04 2 TPASS : chown failed: TEST_ERRNO=EACCES(13): Permission denied > chown04 3 TPASS : chown failed: TEST_ERRNO=EFAULT(14): Bad address > chown04 4 TPASS : chown failed: TEST_ERRNO=ENAMETOOLONG(36): > File name too long > chown04 5 TPASS : chown failed: TEST_ERRNO=ENOENT(2): No such > file or directory > chown04 6 TPASS : chown failed: TEST_ERRNO=ENOTDIR(20): Not a directory > chown04 7 TPASS : chown failed: TEST_ERRNO=ELOOP(40): Too many > levels of symbolic links > chown04 8 TPASS : chown failed: TEST_ERRNO=EROFS(30): Read-only > file system > mke2fs 1.43.8 (1-Jan-2018) > chown04_16 0 TINFO : Using test device LTP_DEV='/dev/loop0' > chown04_16 0 TINFO : Formatting /dev/loop0 with ext2 opts='' extra opts='' > chown04_16 1 TCONF : > /usr/src/debug/ltp/20190930-r0/git/testcases/kernel/syscalls/chown/../utils/compat_16.h:168: > 16-bit version of chown() is not supported on your platform > chown04_16 2 TCONF : > /usr/src/debug/ltp/20190930-r0/git/testcases/kernel/syscalls/chown/../utils/compat_16.h:168: > Remaining cases not appropriate for configuration > > Ref: > https://lkft.validation.linaro.org/scheduler/job/1262252#L2152 > https://lkft.validation.linaro.org/scheduler/job/1262374#L1313 > https://lkft.validation.linaro.org/scheduler/job/1262121#L2153 > https://lkft.validation.linaro.org/scheduler/job/1262105#L2116 > > -- > Linaro LKFT > https://lkft.linaro.org -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
