Hide Forgot
Description of problem: Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
！！ In rhel6, #define __pa(x) __phys_addr((unsigned long)(x)) unsigned long __phys_addr(unsigned long x) { if (x >= __START_KERNEL_map) { x -= __START_KERNEL_map; VIRTUAL_BUG_ON(x >= KERNEL_IMAGE_SIZE); x += phys_base; } else { VIRTUAL_BUG_ON(x < PAGE_OFFSET); x -= PAGE_OFFSET; VIRTUAL_BUG_ON(!phys_addr_valid(x)); } return x; } In rhel5, #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) and after scanning code, PAGE_OFFSET = 0xffff810000000000UL __START_KERNEL_map = 0xffffffff80000000UL So if use __pa on the address of static var or local var(with address above 0xffffffff80000000), then __pa will return wrong value. and in sparse memory mode, virt_to_page use __pa. virt_to_page will crash the kernel. Does this enough???
This bug/component is not included in scope for RHEL-5.11.0 which is the last RHEL5 minor release. This Bugzilla will soon be CLOSED as WONTFIX (at the end of RHEL5.11 development phase (Apr 22, 2014)). Please contact your account manager or support representative in case you need to escalate this bug.
Thank you for submitting this request for inclusion in Red Hat Enterprise Linux 5. We've carefully evaluated the request, but are unable to include it in RHEL5 stream. If the issue is critical for your business, please provide additional business justification through the appropriate support channels (https://access.redhat.com/site/support).