> On Oct 20, 2017, at 5:20 PM, Ingo Molnar <mingo@xxxxxxxxxx> wrote: > > > * Thomas Garnier <thgarnie@xxxxxxxxxx> wrote: > >>>> */ >>>> - cmpq $.Lentry_SYSCALL_64_after_fastpath_call, (%rsp) >>>> + leaq .Lentry_SYSCALL_64_after_fastpath_call(%rip), %r11 >>>> + cmpq %r11, (%rsp) >>>> jne 1f > >>> This patch seems to add extra overhead to the syscall fast-path even when PIE is >>> disabled, right? >> >> It does add extra instructions when one is not possible, I preferred >> that over ifdefing but I can change it. > > So my problem is, this pattern repeats in many other places as well, but sprinking > various pieces of assembly code with #ifdefs would be very bad as well. > > I have no good idea how to solve this. > How about: .macro JMP_TO_LABEL ... > Thanks, > > Ingo _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
