On Mon, Jun 15, 2020 at 06:48:59PM -0700, Matthew Wilcox wrote: > On Mon, Jun 15, 2020 at 09:33:09PM -0400, Qian Cai wrote: > > Ever since a few days ago, linux-next on s390 has started to crash > > with compiling workloads or during boot below. > > > > This .config if ever matters, > > > > https://raw.githubusercontent.com/cailca/linux-mm/master/s390.config > > CONFIG_READ_ONLY_THP_FOR_FS=y > > This looks like a duplicate of > https://bugzilla.kernel.org/show_bug.cgi?id=206569 > > which Song has had no luck reproducing. > > I would suggest simply disabling the Kconfig option for now. Thanks for the information. Indeed, I can't reproduce it anymore after setting READ_ONLY_THP_FOR_FS=n. > > > Since our s390 guest has only 2 CPUs, it is probably going to take a > > long time to bisect. > > > > 01: [ 60.589979] page:000003d0830bd540 refcount:257 mapcount:0 mapping:0000000 > > 01: 0ac9dec15 index:0x155 head:000003d0830bc000 order:8 compound_mapcount:0 comp > > 01: ound_pincount:0 > > 01: [ 60.590361] mapping->aops:xfs_address_space_operations [xfs] dentry name: > > 01: "lvm" > > 01: [ 60.590369] flags: 0x2000000000000000() > > 01: [ 60.590380] raw: 2000000000000000 000003d0830bc001 000003d0830bd548 00000 > > 01: 00000000400 > > 01: [ 60.590387] raw: 0000000000000000 0000000000000000 ffffffff00000000 00000 > > 01: 00000000000 > > 01: [ 60.590394] head: 2000000000010015 000003d0830dd588 000000008fb34c20 0000 > > 01: 0000cc4f0568 > > 01: [ 60.590401] head: 0000000000000100 0000000000000000 ffffffff00000101 0000 > > 01: 00008f78a000 > > 01: [ 60.590407] page dumped because: VM_BUG_ON_PAGE(page_to_pgoff(page) != o > > 01: fset) > > 01: [ 60.590428] ------------[ cut here ]------------ > > 01: [ 60.590435] kernel BUG at mm/filemap.c:2516! > > 01: [ 60.590512] monitor event: 0040 ilc:2 [#1] SMP > > 01: [ 60.590518] Modules linked in: ip_tables x_tables xfs dm_mirror dm_region > > 01: _hash dm_log dm_mod > > 01: [ 60.590531] CPU: 1 PID: 665 Comm: lvmconfig Not tainted 5.8.0-rc1-next-20 > > 01: 200615 #1 > > 01: [ 60.590535] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) > > 01: [ 60.590539] Krnl PSW : 0704c00180000000 00000000bdf0bb46 (filemap_fault+0 > > 01: x191e/0x27c0) > > 01: [ 60.590550] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 > > 01: RI:0 EA:3 > > 01: [ 60.590555] Krnl GPRS: 0000000000000001 0000037c002adef5 000003d0830bd578 > > 01: 0000030000000000 > > 01: [ 60.591850] 0000030000000001 0000030000000000 000003e00156fdc8 > > 01: 000003e00156fdc0 > > 01: [ 60.591854] 00000000c8f0b800 0000000000000155 000003d0830bd548 > > 01: 000003d0830bd540 > > 01: [ 60.591859] 00000000bed41008 00000000bea6f900 00000000bdf0bb42 > > 01: 000003e00156f9d0 > > 01: [ 60.591872] Krnl Code: 00000000bdf0bb36: c030005b1e45 larl %r3, > > 01: 00000000bea6f7c0 > > 01: [ 60.591872] 00000000bdf0bb3c: c0e5000597ca brasl %r14 > > 01: ,00000000bdfbead0 > > 01: [ 60.591872] #00000000bdf0bb42: af000000 mc 0,0 > > 01: [ 60.591872] >00000000bdf0bb46: c020007d238d larl %r2, > > 01: 00000000beeb0260 > > 01: [ 60.591872] 00000000bdf0bb4c: c0e50028aebe brasl %r14 > > 01: ,00000000be4218c8 > > 01: [ 60.591872] 00000000bdf0bb52: eb1a0003000c srlg %r1, > > 01: %r10,3 > > 01: [ 60.591872] 00000000bdf0bb58: a52d0300 llihl %r2, > > 01: 768 > > 01: [ 60.591872] 00000000bdf0bb5c: b9080012 agr %r1, > > 01: %r2 > > 01: [ 60.591901] Call Trace: > > 01: [ 60.591905] [<00000000bdf0bb46>] filemap_fault+0x191e/0x27c0 > > 01: [ 60.591910] ([<00000000bdf0bb42>] filemap_fault+0x191a/0x27c0) > > 01: [ 60.591967] [<000003ff80240cfc>] xfs_filemap_fault+0x1ac/0x528 [xfs] > > __xfs_filemap_fault at /home/linux-mm/linux/fs/xfs/xfs_file.c:1214 > > (inlined by) xfs_filemap_fault at /home/linux-mm/linux/fs/xfs/xfs_file.c:1228 > > 01: [ 60.591973] [<00000000bdfc8428>] __do_fault+0xc0/0x470 > > 01: [ 60.591977] [<00000000bdfd75f2>] handle_mm_fault+0x1782/0x29b8 > > 01: [ 60.591983] [<00000000bdb50c60>] do_dat_exception+0x200/0x9c8 > > do_exception at arch/s390/mm/fault.c:481 > > (inlined by) do_dat_exception at arch/s390/mm/fault.c:583 > > 01: [ 60.591993] [<00000000be9f4b76>] pgm_check_handler+0x1d6/0x234 > > 01: [ 60.591997] INFO: lockdep is turned off. > > 01: [ 60.592000] Last Breaking-Event-Address: > > 01: [ 60.592004] [<00000000bdfbeafc>] dump_page+0x2c/0x40 > > 01: [ 60.606521] Kernel panic - not syncing: Fatal exception: panic_on_oops > > 00: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from > > CPU 00. > > 00: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from > > CPU 01. > > 01: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 BDB32B58
