On Tue, Mar 12, 2013 at 06:53:49PM +0530, Prabhu nath wrote:
> kmem_cache_alloc() is used to allocate a memory object from a respective
> cache.
> Can you elaborate on what is ur objective or can you get us how you have
> invoked this function.
>
> To my understanding kmem_cache_alloc() will just return a linear virtual
> address (void *) of a memory object.
>
yes, it returns to me a struct inode * , whose valuse is reasonable ,
the value of its member struct list_head i_dentry is {0x1,0x3 },their structures
is as below :
struct inode
{
struct hlist_node i_hash;
struct list_head i_list;
struct list_head i_dentry;
unsigned long i_ino;
....
}
struct list_head
{
struct list_head *next, *prev;
};
After locate memory from cache , the i_dentry's **next** member, whose valuse is 0x1 , will be used to
linked with another list_head , in this procedure there is a addressing instruction to 0x1,but this time
the low memory region has been zaped by setting pde at 0x0 to zero , so this addressing causes a
page_fault, then goto reboot .
how to resolve this ?
>
> --
> Regards,
> Prabhunath G
> Linux Trainer
> Bangalore
>
>
> On Thu, Mar 7, 2013 at 8:15 PM, ishare <june.tune.sea@xxxxxxxxx> wrote:
>
> >
> > In init procedure ,I use kmem_cache_alloc to apply for memory to locate
> > a inode struct.
> > it returns to me a inode whose i_dentry element cantain a struct
> > list_head pointing to address 0x3,
> > Is the address within low momery resonable or illegal?
> >
> > thanks!
> >
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> >
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