On Sat, 29 Apr 2006 04:00:49 -0400, Chuck Ebbert <[email protected]> wrote:
>On Fri, 28 Apr 2006 14:54:40 +0200, Mikael Pettersson wrote:
>
>> Running an FP exception using user-space application
>> (the runtime system for the Erlang programming language
>> in my case) on an Athlon64 with a 32-bit 2.6.17-rc3 kernel
>> quickly results in a complete system hang: mouse is dead,
>> keyboard is dead, the network doesn't reply to pings.
>> Had to reboot via the power switch to get the machine back.
>>
>> This happended twice in a row. With 2.6.17-rc2 things
>> work fine like they always have before.
>
>This should fix it... please test.
>
>Signed-off-by: Chuck Ebbert <[email protected]>
>
>--- 2.6.17-rc3-d4.orig/include/asm-i386/i387.h
>+++ 2.6.17-rc3-d4/include/asm-i386/i387.h
>@@ -58,13 +58,13 @@ static inline void __save_init_fpu( stru
> alternative_input(
> "fnsave %[fx] ;fwait;" GENERIC_NOP8 GENERIC_NOP4,
> "fxsave %[fx]\n"
>- "bt $7,%[fsw] ; jc 1f ; fnclex\n1:",
>+ "bt $7,%[fsw] ; jnc 1f ; fnclex\n1:",
> X86_FEATURE_FXSR,
> [fx] "m" (tsk->thread.i387.fxsave),
> [fsw] "m" (tsk->thread.i387.fxsave.swd) : "memory");
> /* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception
> is pending. Clear the x87 state here by setting it to fixed
>- values. __per_cpu_offset[0] is a random variable that should be in L1 */
>+ values. safe_address is a random variable that should be in L1 */
> alternative_input(
> GENERIC_NOP8 GENERIC_NOP2,
> "emms\n\t" /* clear stack tags */
This fixed the problem. Thanks.
Acked-by: Mikael Pettersson <[email protected]>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
