From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-trivial@nongnu.org, Michael Tokarev <mjt@tls.msk.ru>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-trivial] [PATCH] tls.h: Enable TLS on FreeBSD
Date: Fri, 28 Jun 2013 16:47:03 +0200 [thread overview]
Message-ID: <51CDA1E7.9000100@redhat.com> (raw)
In-Reply-To: <CAFEAcA-M9RnRv8TZjcY8C1KgRj+2k8JT1QKrtHhfo6BafNQQWQ@mail.gmail.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-trivial@nongnu.org, Ed Maste <emaste@freebsd.org>,
Michael Tokarev <mjt@tls.msk.ru>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [Qemu-trivial] [PATCH] tls.h: Enable TLS on FreeBSD
Date: Fri, 28 Jun 2013 16:47:03 +0200 [thread overview]
Message-ID: <51CDA1E7.9000100@redhat.com> (raw)
In-Reply-To: <CAFEAcA-M9RnRv8TZjcY8C1KgRj+2k8JT1QKrtHhfo6BafNQQWQ@mail.gmail.com>
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
next prev parent reply other threads:[~2013-06-28 14:47 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-24 19:21 [Qemu-trivial] [PATCH] tls.h: Enable TLS on FreeBSD Ed Maste
2013-06-24 19:21 ` [Qemu-devel] " Ed Maste
2013-06-24 21:15 ` [Qemu-trivial] " Paolo Bonzini
2013-06-24 21:15 ` [Qemu-devel] " Paolo Bonzini
2013-06-24 21:30 ` [Qemu-trivial] " Peter Maydell
2013-06-24 21:30 ` Peter Maydell
2013-06-25 6:18 ` [Qemu-trivial] " Paolo Bonzini
2013-06-25 6:18 ` [Qemu-devel] " Paolo Bonzini
2013-06-25 10:56 ` [Qemu-trivial] " Peter Maydell
2013-06-25 10:56 ` Peter Maydell
2013-06-25 10:58 ` [Qemu-trivial] " Paolo Bonzini
2013-06-25 10:58 ` Paolo Bonzini
2013-06-28 10:34 ` [Qemu-trivial] " Michael Tokarev
2013-06-28 10:34 ` [Qemu-devel] " Michael Tokarev
2013-06-28 12:54 ` [Qemu-trivial] [Qemu-devel] " Ed Maste
2013-06-28 12:54 ` [Qemu-devel] [Qemu-trivial] " Ed Maste
2013-06-28 13:03 ` [Qemu-trivial] [Qemu-devel] " Paolo Bonzini
2013-06-28 13:03 ` [Qemu-devel] [Qemu-trivial] " Paolo Bonzini
2013-06-28 13:05 ` [Qemu-trivial] [Qemu-devel] " Peter Maydell
2013-06-28 13:05 ` [Qemu-devel] [Qemu-trivial] " Peter Maydell
2013-06-28 14:08 ` [Qemu-trivial] [Qemu-devel] " Ed Maste
2013-06-28 14:08 ` [Qemu-devel] [Qemu-trivial] " Ed Maste
2013-06-28 14:47 ` Paolo Bonzini [this message]
2013-06-28 14:47 ` Paolo Bonzini
2013-06-28 14:55 ` Peter Maydell
2013-06-28 14:55 ` [Qemu-devel] " Peter Maydell
2013-06-28 15:11 ` Paolo Bonzini
2013-06-28 15:11 ` [Qemu-devel] " Paolo Bonzini
2013-06-28 15:35 ` Ed Maste
2013-06-28 15:35 ` [Qemu-devel] " Ed Maste
2013-06-28 15:37 ` Paolo Bonzini
2013-06-28 15:37 ` [Qemu-devel] " Paolo Bonzini
2013-07-01 8:03 ` Stefan Hajnoczi
2013-07-01 8:03 ` [Qemu-devel] " Stefan Hajnoczi
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