On 8/19/21 6:54 PM, Lloyd wrote:
Hi,
I am trying to print the address of consecutive locations in a memory allocated using kmalloc. It prints non contiguous addresses! I tried with kmalloc_array, and normal array on stack, I got the same result. May I know the reason? The code fragment for array and result are given below.
uint8_t MyArray[100]={'0'}; printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[0]); printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[1]); printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[2]);
[ 8684.613909] Address is-> 00000000b3330991 [ 8684.613914] Address is-> 000000000519068c [ 8684.613915] Address is-> 00000000e448ca76
Quoted from Documentation/core-api/printk-formats.rst:
A raw pointer value may be printed with %p which will hash the address before printing. The kernel also supports extended specifiers for printing pointers of different types. So the address printed neither logical nor physical address.
Thanks a lot, Lloyd
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