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Date:   Mon, 18 Sep 2017 20:26:05 +0530
From:   Abdul Haleem <>
To:     linuxppc-dev <>
Cc:     linux-xfs <>,
        Christoph Hellwig <>, Jens Axboe <>,
        linux-next <>,
        linux-kernel <>,
        chandan <>
Subject: [linux-next][XFS][trinity] WARNING: CPU: 32 PID: 31369 at


A warning is triggered from:

file fs/iomap.c in function iomap_dio_rw

    if (ret)
        goto out_free_dio;

    ret = invalidate_inode_pages2_range(mapping,
            start >> PAGE_SHIFT, end >> PAGE_SHIFT);
>>  WARN_ON_ONCE(ret);
    ret = 0;


Machine Type: Power 7 PowerVM LPAR
Kernel : 4.13.0-next-20170915
gcc: 4.8.5
Test: trinity fuzzer

------------[ cut here ]------------
WARNING: CPU: 32 PID: 31369 at fs/iomap.c:993 .iomap_dio_rw+0x470/0x480
Modules linked in: dlci(E) 8021q(E) garp(E) mrp(E) af_key(E)
ieee802154_socket(E) ieee802154(E) rpcrdma(E) ib_isert(E)
iscsi_target_mod(E) ib_iser(E) libiscsi(E) ib_srpt(E) target_core_mod(E)
ib_srp(E) hidp(E) ib_ipoib(E) cmtp(E) kernelcapi(E) rdma_ucm(E)
ib_ucm(E) bnep(E) ib_uverbs(E) rfcomm(E) bluetooth(E) ib_umad(E)
rdma_cm(E) ecdh_generic(E) rfkill(E) ib_cm(E) iw_cm(E) pptp(E) gre(E)
l2tp_ppp(E) l2tp_netlink(E) l2tp_core(E) ip6_udp_tunnel(E) udp_tunnel(E)
pppoe(E) pppox(E) ppp_generic(E) slhc(E) crypto_user(E) ib_core(E)
nfnetlink(E) scsi_transport_iscsi(E) atm(E) sctp(E) dccp_ipv4(E)
netlink_diag(E) dccp_diag(E) ip6table_filter(E) af_packet_diag(E)
unix_diag(E) tcp_diag(E) udp_diag(E) ebtable_filter(E) bridge(E) sg(E)
ibmveth(E) rpadlpar_io(E) loop(E) xt_CHECKSUM(E) iptable_mangle(E)
 ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E)
nf_nat_ipv4(E) nf_nat(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E)
xt_conntrack(E) nf_conntrack(E) ipt_REJECT(E) nf_reject_ipv4(E) tun(E)
stp(E) llc(E) rpaphp(E) kvm_pr(E) kvm(E) ebtables(E) ip6_tables(E)
dccp(E) inet_diag(E) iptable_filter(E) nfsd(E) auth_rpcgss(E) nfs_acl(E)
lockd(E) grace(E) sunrpc(E) binfmt_misc(E) ip_tables(E) ext4(E)
mbcache(E) jbd2(E) sd_mod(E) ibmvscsi(E) scsi_transport_srp(E) [last
unloaded: netlink_diag]
CPU: 32 PID: 31369 Comm: trinity-c133 Tainted: G            E
4.13.0-next-20170915-autotest #1
task: c0000009f4149d80 task.stack: c000000546920000
NIP:  c0000000003aac40 LR: c0000000003aa9e8 CTR: 0000000000000000
REGS: c000000546923630 TRAP: 0700   Tainted: G            E
MSR:  800000000282b032 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI>  CR: 28004428
XER: 20000000  
CFAR: c0000000003aa9f0 SOFTE: 1 
GPR00: c0000000003aa9e8 c0000005469238b0 c000000001453b00
GPR04: 0000000000000000 0000000000000000 0000000000000000
GPR08: 0000000000000000 00000000ffffffff 0000000000000000
GPR12: 0000000028004422 c00000000e945000 0000000000000000
GPR16: 0000000010030bc8 0000000000000000 0000000000000000
GPR20: 0000000000000000 0000000000000000 c0000013ebcc16a0
GPR24: c00000099ec0c2d0 c000000000a49168 c00000099ec0c158
GPR28: c000000546923d40 0000000000000014 0000000000000000
NIP [c0000000003aac40] .iomap_dio_rw+0x470/0x480
LR [c0000000003aa9e8] .iomap_dio_rw+0x218/0x480
Call Trace:
[c0000005469238b0] [c0000000003aa9e8] .iomap_dio_rw+0x218/0x480
[c0000005469239d0] [c0000000004639c8] .xfs_file_dio_aio_read+0x88/0x160
[c000000546923a70] [c000000000463f44] .xfs_file_read_iter+0x104/0x120
[c000000546923b00] [c0000000003248f0] .do_iter_readv_writev+0x190/0x1c0
[c000000546923bb0] [c000000000325d90] .do_iter_read+0xf0/0x280
[c000000546923c50] [c00000000032858c] .vfs_readv+0x6c/0xa0
[c000000546923d90] [c0000000003287b8] .do_preadv+0xd8/0x120
[c000000546923e30] [c00000000000b184] system_call+0x58/0x6c
Instruction dump:
7c0af000 40c20010 7c60492d 40c2fff0 7c0004ac 4bfffe90 60000000 60000000 
3be0fdef 4bfffc0c 3be0fff4 4bfffc04 <0fe00000> 4bfffdb0 00000000
---[ end trace bd674540a2bf235b ]---


Abdul Haleem
IBM Linux Technology Centre

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