Date: Wed, 17 Jan 2007 21:58:04 +0100 From: Ivan Voras <ivoras@fer.hr> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: freebsd-current@freebsd.org, freebsd-arch@freebsd.org Subject: Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs Message-ID: <45AE8DDC.8030402@fer.hr> In-Reply-To: <200701172022.l0HKMYV8053837@apollo.backplane.com> References: <3bbf2fe10607250813w8ff9e34pc505bf290e71758@mail.gmail.com> <3bb f2fe10607281004o6727e976h19ee7e054876f914@mail.gmail.com> <3bbf2fe107011608 51r79b04464m2cbdbb7f644b22b6@mail.gmail.com> <20070116154258.568e1aaf@pleia des.nextvenue.com> <b1fa29170701161355lc021b90o35fa5f9acb5749d@mail.gmail.c om> <eoji7s$cit$2@sea.gmane.org> <b1fa29170701161425n7bcfe1e5m1b8c671caf375 8db@mail.gmail.com> <eojlnb$qje$1@sea.gmane.org> <3bbf2fe10701161525j6ad929 2y93502b8df0f67aa9@mail.gmail.com> <45AD6DFA.6030808@FreeBSD.org> <3bbf2fe1 0701161655p5e686b52n7340b3100ecfab93@mail.gmail.com> <200701172022.l0HKMYV8053837@apollo.backplane.com>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig5EF4019AFDFB80A298524055 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Matthew Dillon wrote: > * Saving the FP state. The kernel doesn't have to save or restore > anything if userland was not using the floating point unit. In > fact, the kernel doesn't even need to FNINIT! All the kernel nee= ds > to do is CLTS and FNCLEX to make the FP unit usable for media cop= y > instructions, then set CR0_TS when it is finished. Does the same hold true with kernel threads in FreeBSD (e.g. two threads using FPU)? --------------enig5EF4019AFDFB80A298524055--
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