On Sun, Sep 12, 2010 at 11:26 +0600, Anton Maksimenkov wrote:
> Hello.
> I use my OBSD machine to test some server on another machine. They are
> connected by pathcord, 1Gbit network cards are used.
> Test program (uses kqueue) do many (I want thousands) connections to
> server. Write query, read answer.
> And it tries to keep that much connections by doing as much new
> connections as needed.
>
> When number of connections kept below 100 - all ok. But if I raise
> them (upto about 500-1000) the program start these connections, do
> some write/read (show about 10-20 successful reads) and the kernel
> hangs. 1-2 sec after start.
> Tweaks - kern.maxfiles=16384 and openfiles-cur/max=8192 for my user.
>
> Info from ddb (see dmesg below):
>
> ddb> show panic
> the kernel did not panic
>
> ddb> trace
> Debugger(0,3f8,0,0,1) at Debugger+0x4
> comintr(d1571000) at comintr+0x287
> Xrecurse_legacy4() at Xrecurse_legacy4+0xb3
> --- interrupt ---
> pool_do_get(d0a10b60,0,0,0,60) at pool_do_get+0x2c2
> pool_get(d0a10b60,0,80000000,0,0) at pool_get+0x54
> m_gethdr(1,1,80000000,369e99,0) at m_gethdr+0x39
> m_clget(0,1,d1526054,800,d03e1aeb) at m_clget+0x10a
> re_newbuf(d1526000,10,d999eb48,d02b30cc,d1526000) at re_newbuf+0x35
> re_rx_list_fill(d1526000,20,60,58,d1520010) at re_rx_list_fill+0x21
> re_rxeof(d1526000,d9799800,3e,10,10) at re_rxeof+0x37c
> re_intr(d1526000) at re_intr+0x12a
> Xrecurse_legacy11() at Xrecurse_legacy11+0xb7
> --- interrupt ---
> filt_soread(d9a5bdc0,0,0,d9a5bd98,d9a5bd98) at filt_soread+0x1
> selwakeup(d9a5bdbc,d9b08300,d9b08200,d9b08300,d9a5bd98) at selwakeup+0x22
> sowakeup(d9a5bd4c,d9a5bd98,14,d999ed24,1) at sowakeup+0x1d
> tcp_input(d9b08300,14,0,0,6) at tcp_input+0x26ac
> ipv4_input(d9b08300,0,d999ede8,d0202089,d03d0058) at ipv4_input+0x42a
> ipintr(d03d0058,d09e0010,10,d5d10010,d09e72c0) at ipintr+0x49
> Bad frame pointer: 0xd999ede8
>
there's a forgotten splx in the driver. that explains why system
appears to be hung. OK?
Index: re.c
===================================================================
RCS file: /home/cvs/src/sys/dev/ic/re.c,v
retrieving revision 1.128
diff -u -p -u -p -r1.128 re.c
--- re.c 27 Aug 2010 17:08:00 -0000 1.128
+++ re.c 5 Oct 2010 08:27:05 -0000
@@ -2042,8 +2042,10 @@ re_init(struct ifnet *ifp)
if (sc->sc_hwrev != RL_HWREV_8139CPLUS)
CSR_WRITE_2(sc, RL_MAXRXPKTLEN, 16383);
- if (sc->rl_testmode)
+ if (sc->rl_testmode) {
+ splx(s);
return (0);
+ }
mii_mediachg(&sc->sc_mii);
