The question come again.

The question come again.

[liyu@WAN]

Hi, everyone on LKML:
   
    I am reading slab implement code (2.6.11.11).

    The function kmalloc() is one of the frequently used funtions in 
kernel , of course,
it is one of my focuses.

    But I found it may call __you_cannot_kmalloc_that_much(). but I can 
not get where is
defined. I tried to search in LXR , Source navigator, and run grep in 
include, mm directory,
but nothing to return.

    What's secret in here? Waitting for any answer.

    Thanks.



                                                             liyu
                                                                  NOW~


                                                            

Re: The question come again.

[Valdis.Kletnieks]

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On Sun, 10 Jul 2005 11:28:20 +0800, "liyu@WAN" said:

>     But I found it may call __you_cannot_kmalloc_that_much(). but I can 
> not get where is
> defined.

Note that you can only reach it if you have a *compile-time constant* of
over 32M or so in size.  If it's smaller, it will catch the appropriate
if/then from kmalloc_sizes.h (and all the others removed by the optimizer).

And since there *isn't* a definition, you'll get a complaint when you
try to link vmlinux - and the complaint will tell you where it's referenced.



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