Re: downgrading woody kernel 2.4 -> 2.2
> > experiencing several crashes. I think it's because the 2.4 kernel (but
> > if not, just tell me please ;), so I decided to downgrade the kernel to
> > 2.2 (whis is available in woody).
> It's not possible for us to even comment on the likely cause of your problems.
Ok, to be more specific. The customer ran a script nightly from
cron, and the script is very resource intensive.
(commandline PHP script, with high Postgres usage).
After the script started, various problems happened, often the whole
I found entries like this in the logfiles:
: Code: ff 0b 0f 94 c0 84 c0 0f 84 88 00 00 00 8b 43 0c 50 e8 40 66
: <1>Unable to handle kernel paging request at virtual address 0000c080
: printing eip:
: *pde = 00000000
: Oops: 0002
: CPU: 0
: EIP: 0010:[exit_sighand+26/80] Not tainted
: EFLAGS: 00010002
: eax: 00000000 ebx: c932c000 ecx: c932c264 edx: 0000c080
: esi: c932c000 edi: 0000000b ebp: 00007960 esp: c932dc78
: ds: 0018 es: 0018 ss: 0018
: Process postmaster (pid: 13023, stackpage=c932d000)
: Stack: 00000000 c0116ef5 c932c000 00000002 00000002 c01113c8 c010704b
: 00000000 c0111717 c020bd1e c932dd54 00000002 c932c000 00000002
: 00008080 00000000 c016c6ce c932c000 c00bbac0 00000001 00030001
: Call Trace: [do_exit+349/460] [do_page_fault+0/1176] [die+79/80]
: [set_cursor+110/128] [vt_console_print+718/736]
: [do_exit+194/460] [do_page_fault+0/1176] [die+79/80]
: [page_cache_release+44/48] [free_page_and_swap_cache+49/52]
: [die+79/80] [do_page_fault+847/1176] [do_page_fault+0/1176]
: [generic_file_read+129/308] [error_code+52/60] [fget+17/40]
But the same happened with the other daemons too...
The system is a PIII@833 with 256Mb of ECC SDRAM.
I was using a self compiled 2.4.17, but the same happened with 2.4.9.
Well, I compiled a 2.2.20 kernel, and installed it with no problems.
It seems to be stable now, but it needs some more testing. (I started
the script, runs smoothly).
I don't know if you get something usable from the above log, if not,
please tell me what should I send.
> To be able to make any guess at the cause of your problems we need to know
> the exact kernel version, the details of your hardware, and some information
> on what your server does would be handy (but is not as important). Without
> such information it's not even worth guessing.
> FWIW All my most important machines run 2.4.x machines and are quite
> reliable. Currently the only reliability issue I have in any of my machines
> is directly related to a binary-only kernel module. Apart from that all my
> machines are capable of running for months at a time (apart from power
> failures, kernel upgrades, hardware changes, etc).
> Signatures >4 lines are rude. If you send email to me or to a mailing list
> that I am subscribed to which has >4 lines of legalistic junk at the end
> then you are specifically authorizing me to do whatever I wish with the
> message (the sig won't be read).
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