On Wed, Aug 17, 2011 at 6:55 AM, Paolo Bonzini <pbonz...@redhat.com> wrote: > On 08/16/2011 09:36 PM, Brad wrote: >> >>> Win32 emulated TLS is slow and is not available on all versions of GCC. >>> Actually, Win32 does have support for decent TLS, only GCC does not map >>> __thread to it. The good news is, it's perfectly possible to declare >>> TLS variables with simple C code! >>> >>> This patch adds wrappers to qemu-thread that will use __thread on POSIX >>> systems, and the .tls segment on Windows. >> >> The actual use of TLS within QEMU on POSIX systems will be optional >> though, right? > > Actually, TLS is already mandatory for both POSIX and Win32 systems.
Not true, we have avoided TLS. > This patch tries to improve the situation on Windows, both by allowing older > GCC versions, and by making TLS faster. On ELF systems, TLS has been > supported by GCC for perhaps 10 years, there's no reason to care. GCC may support it but it can't use it on a platform if the other parts are missing (libc etc.).
