With this stack trace in three tasks, does it mean the socket is in error state? kernel: filetest2 D 0000040000066290 9360 13340 11623 13341 13339 (NOTLB) kernel: Call Trace: kernel: [C0000000CED2F2C0] [C00000000033AEC0] .tcp_sendmsg+0xd34/0xdd4 (unreliable) kernel: [C0000000CED2F490] [C00000000000F794] .__switch_to+0x130/0x154 kernel: [C0000000CED2F520] [C000000000389D48] .schedule+0xd44/0xebc kernel: [C0000000CED2F640] [C000000000388E4C] .__down+0x6c/0xf0 kernel: [C0000000CED2F700] [D00000000068E6F0] .SendReceive2+0x148/0x8b0 [cifs] kernel: [C0000000CED2F850] [D0000000006719DC] .CIFSSMBWrite2+0x25c/0x394 [cifs] kernel: [C0000000CED2F940] [D00000000068624C] .cifs_writepages+0x534/0x810 [cifs] kernel: [C0000000CED2FB00] [C0000000000A59E0] .do_writepages+0x68/0xac kernel: [C0000000CED2FB80] [C00000000009E58C] .__filemap_fdatawrite_range+0x88/0xb8 kernel: [C0000000CED2FC70] [D000000000683A24] .cifs_flush+0x34/0x98 [cifs] kernel: [C0000000CED2FD00] [C0000000000CE348] .filp_close+0x7c/0xd4 kernel: [C0000000CED2FD90] [C0000000000D0034] .sys_close+0xc4/0xfc kernel: [C0000000CED2FE30] [C00000000000871C] syscall_exit+0x0/0x40 0000000000001a98 <.tcp_sendmsg>: 1a98: 7c 08 02 a6 mflr r0 1a9c: fb 81 ff e0 std r28,-32(r1) 1aa0: fb c1 ff f0 std r30,-16(r1) 1aa4: fb e1 ff f8 std r31,-8(r1) 27ac: 7e e4 bb 78 mr r4,r23 27b0: 7f 83 e3 78 mr r3,r28 27b4: 48 00 00 01 bl 27b4 <.tcp_sendmsg+0xd1c> 27b4: R_PPC64_REL24 .sk_stream_error 27b8: 60 00 00 00 nop 27bc: 7c 60 1b 78 mr r0,r3 27c0: 7f 83 e3 78 mr r3,r28 27c4: 7c 13 03 78 mr r19,r0 27c8: 48 00 00 01 bl 27c8 <.tcp_sendmsg+0xd30> 27c8: R_PPC64_REL24 .release_sock 27cc: 60 00 00 00 nop 27d0: 38 21 01 10 addi r1,r1,272 27d4: 7e 63 9b 78 mr r3,r19 27d8: e8 01 00 10 ld r0,16(r1) 27dc: e9 c1 ff 70 ld r14,-144(r1) 27e0: e9 e1 ff 78 ld r15,-136(r1) 27e4: ea 01 ff 80 ld r16,-128(r1) 27e8: ea 21 ff 88 ld r17,-120(r1) 27ec: ea 41 ff 90 ld r18,-112(r1) 27f0: ea 61 ff 98 ld r19,-104(r1) 27f4: ea 81 ff a0 ld r20,-96(r1) 27f8: 7c 08 03 a6 mtlr r0 27fc: ea a1 ff a8 ld r21,-88(r1) int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t size) { struct iovec *iov; struct tcp_sock *tp = tcp_sk(sk); struct sk_buff *skb; int iovlen, flags; int mss_now, size_goal; int err, copied; long timeo; ....................... ....................... ....................... out_err: err = sk_stream_error(sk, flags, err); TCP_CHECK_TIMER(sk); release_sock(sk); return err; } I do not subscirbe to this mailing list, so please include this address in the reply. Regards, Shirish -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html