Messages in this thread |  | | Date | Tue, 08 May 2001 00:52:32 +0200 | From | Jesper Juhl <> | Subject | Re: [PATCH] x86 page fault handler not interrupt safe |
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Linus Torvalds wrote:
> > In particular, does anybody have a buggy Pentium to test with the F0 0F > lock-up bug? It _should_ be caught with the error-code test (it's a > protection fault, not a non-present fault and thus the F0 0F case never > enters the vmalloc path), but it's been several years since the thing.. > > If anybody has such a beast, please try this kernel patch _and_ running > the F0 0F bug-producing program (search for it on the 'net - it must be > out there somewhere) to verify that the code still correctly handles that > case. >
I have a Thinkpad with a buggy pentium (see cat /proc/cpuinfo below) and I tried running the F00F test program available from http://lwn.net/2001/0329/a/ltp-f00f.php3 first on a 2.2.17 kernel that I've been running for ages without problems I got this output:
Testing for proper f00f instruction handling. SIGILL received from f00f instruction. Good.
Then I tried 2.4.4 with your patch applied and got the same output (and no lockup), so according to that test program your patch does not break the F00F handling code. :-)
If you want me to test other patches, just let me know and I'll be happy to do so!
$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 5 model : 8 model name : Mobile Pentium MMX stepping : 1 cpu MHz : 232.111 fdiv_bug : no hlt_bug : no sep_bug : no f00f_bug : yes coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr mce cx8 mmx bogomips : 463.67
Best regards, Jesper Juhl - juhl@eisenstein.dk
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