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Date:      Wed, 13 Feb 2008 00:30:36 -0800
From:      Xin LI <delphij@delphij.net>
To:        FreeBSD Current <freebsd-current@freebsd.org>
Subject:   [backtrace] RELENG_7_0 on NFS
Message-ID:  <47B2AAAC.1030906@delphij.net>

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Hi,

I hit this while copying a large (~500MB) file from Linux (client) to
FreeBSD (server), which is easily reproducable.  Mount options are:
rsize=262144,wsize=262144,tcp.

*sb at /usr/src/sys/kern/uipc_sockbuf.c:939:

$7 = {sb_sel = {si_thrlist = {tqe_next = 0x0, tqe_prev = 0x0}, si_thread
= 0x0, si_note = {kl_list = {slh_first = 0x0},
      kl_lock = 0xffffffff80453a00 <knlist_mtx_lock>, kl_unlock =
0xffffffff804533d0 <knlist_mtx_unlock>, kl_locked = 0xffffffff804533b0
<knlist_mtx_locked>,
      kl_lockarg = 0xffffff000e7649f0}, si_flags = 0}, sb_mtx =
{lock_object = {lo_name = 0xffffffff807f15f5 "so_snd", lo_type =
0xffffffff807f15f5 "so_snd",
      lo_flags = 16973824, lo_witness_data = {lod_list = {stqe_next =
0x0}, lod_witness = 0x0}}, mtx_lock = 18446742974254660080, mtx_recurse
= 0}, sb_sx = {
    lock_object = {lo_name = 0xffffffff807f15fc "so_snd_sx", lo_type =
0xffffffff807f15fc "so_snd_sx", lo_flags = 37421056, lo_witness_data =
{lod_list = {
          stqe_next = 0x0}, lod_witness = 0x0}}, sx_lock =
18446742974254660080, sx_recurse = 0}, sb_state = 0, sb_mb =
0xffffff000eded600,
  sb_mbtail = 0xffffff000e6e5300, sb_lastrecord = 0xffffff000eded600,
sb_sndptr = 0xffffff000e6e5300, sb_sndptroff = 1004, sb_cc = 1504,
sb_hiwat = 233016,
  sb_mbcnt = 2560, sb_mbmax = 262144, sb_ctl = 0, sb_lowat = 2048,
sb_timeo = 0, sb_flags = 2048}


Cheers,
- --
Xin LI <delphij@delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!
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