Date: Sun, 17 Nov 2002 23:34:55 -0400 (AST) From: "Marc G. Fournier" <scrappy@hub.org> To: freebsd-stable@freebsd.org Subject: Re: -STABLE was stable for long time Message-ID: <20021117232943.C23359-100000@hub.org> In-Reply-To: <20021118031634.GA755@laurel.tmseck.homedns.org>
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On Mon, 18 Nov 2002, Thomas Seck wrote:
> Test programs that bevave like your users - spawning lots of processes
> and the like? I am not a developer - are there some "load simulating"
> suites available? If so, I could give them a try regularly on various
> i386 machines at work. If not, could we talk some of the core developers
> into developing a test suite?
The problem, again, is that once you get into the real life scenario, you
are dealing with 100+1 different programs that are not only putting a load
on the server, but are interacting with it ...
Basically, the 'test suite' is guys like myself that are willing to take
the risk and run -STABLE ... the mechanism that needs to be put into
place, though, is for getting those bugs addressed so that they don't
repeat ...
> I am talking with my system administrator hat on. My production servers
> did not run into troubles with -RELEASE so far. My -STABLE machines at
> home did not, too. Maybe I am just lucky... But I agree with you that
> having some dedicated testing boxes would be a "good thing"(tm).
10hrs after I downgraded to RELENG_4_7, the server crashed ... in the VM
subsystem, from what I can tell:
(kgdb) where
#0 0xc959b256 in ?? ()
#1 0xc013ec50 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:223
#2 0xc013f375 in panic (fmt=0xc02111f9 "%s") at /usr/src/sys/kern/kern_shutdown.c:595
#3 0xc01e4f15 in trap_fatal (frame=0xf46e4e18, eva=4048397648) at /usr/src/sys/i386/i386/trap.c:974
#4 0xc01e4b81 in trap_pfault (frame=0xf46e4e18, usermode=0, eva=4048397648) at /usr/src/sys/i386/i386/trap.c:867
#5 0xc01e46db in trap (frame={tf_fs = 24, tf_es = -194117616, tf_ds = -1071972336, tf_edi = 0, tf_esi = -158666368, tf_ebp = -194097564, tf_isp = -194097596, tf_ebx = -247896864,
tf_edx = -246569648, tf_ecx = 16777217, tf_eax = 0, tf_trapno = 12, tf_err = 2, tf_eip = -1071953732, tf_cs = 8, tf_eflags = 66118, tf_esp = -193136816, tf_ss = -160643136})
at /usr/src/sys/i386/i386/trap.c:466
#6 0xc01b48bc in vm_object_deallocate (object=0xf13964e0) at /usr/src/sys/vm/vm_object.c:386
#7 0xc01b1c03 in vm_map_entry_delete (map=0xf66cc7c0, entry=0xf47cf750) at /usr/src/sys/vm/vm_map.c:1829
#8 0xc01b1d85 in vm_map_delete (map=0xf66cc7c0, start=0, end=3217031168) at /usr/src/sys/vm/vm_map.c:1932
#9 0xc01b1e12 in vm_map_remove (map=0xf66cc7c0, start=0, end=3217031168) at /usr/src/sys/vm/vm_map.c:1957
#10 0xc0137248 in exit1 (p=0xf47be6c0, rv=0) at /usr/src/sys/kern/kern_exit.c:217
#11 0xc0137018 in exit1 (p=0xf47be6c0, rv=-878618816) at /usr/src/sys/kern/kern_exit.c:103
#12 0xc01e5251 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 0, tf_esi = -1, tf_ebp = -1077937844, tf_isp = -194097196, tf_ebx = 672716588, tf_edx = 672716000,
tf_ecx = -1077937460, tf_eax = 1, tf_trapno = 12, tf_err = 2, tf_eip = 672397204, tf_cs = 31, tf_eflags = 647, tf_esp = -1077937888, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1175
#13 0xc01d297b in Xint0x80_syscall ()
cannot read proc at 0
(kgdb)
20hrs later, that same server, with the same kernel, is still purring
along ... and it might be another 20 days before it crashes again ...
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