Jeremy Fitzhardinge wrote: > Add the "nosegneg" fake capabilty to the vsyscall page notes. This is > used by the runtime linker to select a glibc version which then > disables negative-offset accesses to the thread-local segment via > %gs. These accesses require emulation in Xen (because segments are > truncated to protect the hypervisor address space) and avoiding them > provides a measurable performance boost. > > Signed-off-by: Ian Pratt <[EMAIL PROTECTED]> > Signed-off-by: Christian Limpach <[EMAIL PROTECTED]> > Signed-off-by: Chris Wright <[EMAIL PROTECTED]> >
Acked-by: Zachary Amsden <[EMAIL PROTECTED]> We would like to see this by dynamic, but that is much more difficult to achieve, and seeing your recent linker issues, I don't think this should gate merging this code. The performance loss for us I believe to be negligible, and the fix is quite a bit more complicated than something achievable in the .21 timeframe. Zach _______________________________________________ Virtualization mailing list [email protected] https://lists.osdl.org/mailman/listinfo/virtualization
