Il 28/06/2013 15:05, Peter Maydell ha scritto: >>> >> An objection seemed to be that it is not really needed yet, but as >>> >> pointed out by Peter this isn't really the case. This patch brings us >>> >> (FreeBSD) in line with per-thread data semantics on Linux and is used >>> >> by qemu system emulation as well. >> > >> > It brings it in line with Linux, even though FreeBSD has the same need >> > for TLS as OpenBSD and Windows (i.e. none). In other words, we go from >> > two cases (need TLS and uses it, has no TLS and doesn't need it) to >> > three (we add "uses TLS with no need for it"). > I don't understand what you mean by "no need for it". We are > already multithreaded in system mode, so this is simply > making FreeBSD do the same thing as Linux.
cpu_single_env is protected by the BQL unless you're running on KVM. Paolo
