From mboxrd@z Thu Jan 1 00:00:00 1970 From: Louay Gammo Date: Fri, 14 May 2004 22:23:06 +0000 Subject: Re: Fw: epoll oops on 2.6.x Message-Id: <40A546CA.6020109@cs.uwaterloo.ca> MIME-Version: 1 Content-Type: multipart/mixed; boundary="------------020907080901020307090404" List-Id: References: <40A3EAF6.1000902@cs.uwaterloo.ca> In-Reply-To: <40A3EAF6.1000902@cs.uwaterloo.ca> To: linux-ia64@vger.kernel.org This is a multi-part message in MIME format. --------------020907080901020307090404 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Davide Libenzi wrote: >> including some of these oopses as attachements. I am not sure what >>the 'normal' bug reporting mechanism is >>for IA-64 kernels. >> >> > >I'm getting this from Randy, since I was not subscribed to linux-ia64. Now >I am. I took a quick look at it and so far the clue is completely missing. >Only one of the oops actually happen inside epoll, even if the other ones >comes typically from __wake_up_common() (others from vfs_read(), that is >quite unrelated), that let me think that it might be epoll related (epoll >has a wait queue item dropped in). Can you try a few experiments? > >1) Disable pre-emption (if enabled) >2) Load the server thru loopback >3) #define DEBUG_EPOLL 10 > > I did #1 and #2 and ran my original experiment. I did not get a panic but I got 0 replies from the server. So I undid the #2 and I got a kernel panic (included below). So I am going to try to overload the server on loopback interface (I think this is what you are saying) and I will let you know of the results. I am enclosing the kernel config just in case that might clue anyone to a configuration problem. Thanks, Louay Gammo tissimo:~# Unable to handle kernel paging request at virtual address 000000000001003e userver[1284]: Oops 8804682956800 [1] Pid: 1284, CPU 0, comm: userver psr : 0000101008022018 ifs : 8000000000000003 ip : [] Not tainted ip is at prepare_to_wait_exclusive+0x80/0xe0 unat: 0000000000000000 pfs : 0000000000000288 rsc : 0000000000000003 rnat: 0000000000000000 bsps: 0000000000000000 pr : 0000000000158659 ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c0270033f csd : 0000000000000000 ssd : 0000000000000000 b0 : a000000100530360 b6 : a000000100002d70 b7 : a000000100581980 f6 : 000000000000000000000 f7 : 000000000000000000000 f8 : 000000000000000000000 f9 : 000000000000000000000 f10 : 000000000000000000000 f11 : 000000000000000000000 r1 : a000000100990000 r2 : e0000040f5f5fd58 r3 : 0000000000000001 r8 : 0000000000000000 r9 : 000000000001003e r10 : e0000040f5f5fd88 r11 : a000000100722900 r12 : e0000040f5f5fd30 r13 : e0000040f5f58000 r14 : e000004043d26160 r15 : e0000040f5f5fd58 r16 : e0000040f5f58000 r17 : e000004043880d48 r18 : 0000001008026018 r19 : 0000000000000000 r20 : 000000003fffff00 r21 : e0000040f5f5fd58 r22 : ffffffffffff0020 r23 : a0000001008e9ab0 r24 : e0000040f5f5fd78 r25 : a0000001008ea198 r26 : e0000040f5f5fd70 r27 : e000004042206088 r28 : e000004042206090 r29 : e0000040422060a8 r30 : e0000040422060b0 r31 : e0000040422060b8 Call Trace: [] show_stack+0x80/0xa0 sp=e0000040f5f5f900 bsp=e0000040f5f59378 [] die+0x130/0x1a0 sp=e0000040f5f5fad0 bsp=e0000040f5f59340 [] ia64_do_page_fault+0x350/0x920 sp=e0000040f5f5fad0 bsp=e0000040f5f592d8 [] ia64_leave_kernel+0x0/0x260 sp=e0000040f5f5fb60 bsp=e0000040f5f592d8 [] prepare_to_wait_exclusive+0x80/0xe0 sp=e0000040f5f5fd30 bsp=e0000040f5f592c0 [] __lock_sock+0x100/0x1a0 sp=e0000040f5f5fd30 bsp=e0000040f5f59298 [] lock_sock+0x50/0xa0 sp=e0000040f5f5fd90 bsp=e0000040f5f59278 [] inet_accept+0xb0/0x1e0 sp=e0000040f5f5fd90 bsp=e0000040f5f59248 [] sys_accept+0x170/0x300 sp=e0000040f5f5fda0 bsp=e0000040f5f591a0 [] ia64_ret_from_syscall+0x0/0x20 sp=e0000040f5f5fe30 bsp=e0000040f5f591a0 <0>Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing >(Your machine does not look too much in shape looking at INIT messages >though) > > > >- Davide > >- >To unsubscribe from this list: send the line "unsubscribe linux-ia64" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html > > --------------020907080901020307090404 Content-Type: application/x-gzip; name="config.gz" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="config.gz" H4sIANXmpEACA408W3PbNrPv/RWcrw8nmWlr62JZ+mbyAAGghIo3E6Ak54WjWLStE1n0kai2 /vdnAepCkADdmaYJdxfAYrHYGwD9+suvDjoW+duq2DytttsP5yXbZftVka2dt9XPzHnKd8+b l/8663z3P4WTrTfFL7/+Av/96uB8nQFNcdxvig9nm/2VbZ38vdjkuwPgcRi4bJLSZURj5tNA IO/bh2xVwrFHUZDi0I+YR53NwdnlhXPIiisFFyggyAsDDX1CjuNwRgPoUPtOwyDlfgRgxeBE zWQr2x3fryzxBYquLfkjn7MIV7riJI3iEFPOU4Sx0Eix8K7fXgjUiZvyKXPFt87gDJ+GIvKS yZWQzcp/NCFqpKpcqD+mhFBimPMMeR5/9Pm1FzcRdHn9pFHoVdhjIcdTStIgDKMmFPEmjFBE 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