| To: | john cooper <john.cooper@timesys.com> |
|---|---|
| Subject: | Re: PREEMPT |
| From: | sjhill@realitydiluted.com |
| Date: | Thu, 6 Oct 2005 13:45:55 -0500 (CDT) |
| Cc: | Ralf Baechle <ralf@linux-mips.org>, Greg Weeks <greg.weeks@timesys.com>, linux-mips@linux-mips.org |
| In-reply-to: | <43457563.60505@timesys.com> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| Sender: | linux-mips-bounce@linux-mips.org |
> The code base I'm dealing with is a 2.6.13 derivative > with PREEMPT_RT support. Looks like the problem was > due to PREEMPT_RT confusing fpu_emulator_cop1Handler() > resulting in a SIGBUS nailing the associated task. > > I have it sort of working for soft FPU but expect it > requires some attention to safely access a HW FPU where > emulation assistance is needed. > Um, did no one have a look at Atsushi Nemoto's patch earlier today that addressed pre-emption and CPU1, or am I missing something? -Steve |
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