Messages in this thread | | | Date | Mon, 28 Mar 2011 12:44:57 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v2] x86: page: get_order() optimization |
| |
On 03/28/2011 12:33 PM, Maksym Planeta wrote: > > Here is disassembly of patched get_order() with "inline" from > "kernel/kexec.c": > > a6c: 48 8b 5d c8 mov -0x38(%rbp),%rbx > a70: e8 0b fd ff ff callq 780 <get_order.clone.7> > > 0000000000000780 <get_order.clone.7>: > 780: 55 push %rbp > 781: b8 01 00 00 00 mov $0x1,%eax > 786: 48 89 e5 mov %rsp,%rbp > 789: c9 leaveq > 78a: c3 retq > > My version of gcc is gcc (Debian 4.5.2-4) 4.5.2, probably I should > upgrade my gcc version for better inline expansions. >
With what options?
-hpa
| |