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SubjectRe: [crash] Re: Latest brk patchset

* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Ingo Molnar wrote:
>> * Jeremy Fitzhardinge <jeremy@goop.org> wrote:
>>
>>
>>> H. Peter Anvin wrote:
>>>
>>>> Well, the semantics are different; the .bss section is zeroed while the
>>>> brk isn't, and the brk symbols don't necessarily point to the data
>>>> associated with those particular symbols, unlike (of course) the bss.
>>>>
>>>> It's not a big issue, obviously, it just seems cleaner to me that way.
>>>>
>>> OK, I just added a couple of changes to:
>>>
>>> * make the brk reservation symbols have the form ".brk.NAME" to make
>>> them inaccessible from C, and to make them look obviously
>>> different from normal symbols (more like sections, since it is
>>> their size that's more important than their address)
>>> * Put all the brk stuff in a .brk section
>>> * Mention alignment in the comment for the slop space
>>>
>>> J
>>>
>>> The following changes since commit 1e08816af0bc345995c3f26ce4eaba1171ffb531:
>>> Ingo Molnar (1):
>>> Merge branch 'linus'
>>>
>>> are available in the git repository at:
>>>
>>> git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git push/x86/brk
>>>
>>
>> the previous kit in tip:x86/setup-memory is causing crashes. One of
>> them is:
>>
>> init_memory_mapping: 0000000000000000-00000000377fe000
>> 0000000000 - 00377fe000 page 4k
>> Kernel panic - not syncing: Cannot find space
>> for the kernel page tables Pid: 0, comm: swapper Not tainted
>> 2.6.29-rc8-tip-02516-g83219b0-dirty #35476 Call Trace:
>>
>> [<c0128b7b>] panic+0x4b/0x100
>> [<c074a989>] init_memory_mapping+0x429/0x430
>> [<c0cde790>] setup_arch+0x430/0x890
>> [<c0148f4e>] ?
>> lockdep_init_map+0x2e/0x150
>> [<c036f392>] ? __spin_lock_init+0x32/0x60
>> [<c01298d0>] ? printk+0x20/0x30
>> [<c0cdc966>] start_kernel+0xc6/0x330
>> [<c0cdc321>]
>> i386_start_kernel+0x41/0x50
>>
>> full crashlog below, config attached.
>>
>
> What branch is this? I'm trying to build with your config
> with current tip/master w/ tip/x86/setup-memory merged into
> it, but "make ARCH=i386 oldconfig" is asking me about
> CONFIG_SMP, which makes me think the config file is
> incomplete.

just accept the defaults in 'make oldconfig' and you'll get the
right config.

Ingo


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