Messages in this thread Patch in this message | | | Subject | Re: 2.6.6-rc[23] boot failure on x86_64 | From | Chris Mason <> | Date | Thu, 29 Apr 2004 13:45:14 -0400 |
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On Thu, 2004-04-29 at 13:12, Jonathan Corbet wrote: > 2.6.5 runs happily on my Athlon64 system, but the last two 2.6.6-rc > releases (I never tried -rc1) fail. It gets as far as starting init, then > goes into a long, unstoppable series of oopsen; I can't come up with a way > to make it halt so that I can actually read what's going on. > > One time it did stop with a series of three-line messages on screen: > > Unable to handle kernel paging request @ fffffffb82777c88 RIP: > [<ffffffff80462a88>] PML4 103027 PGD 0 > Oops: 0000 [909589208]
Could you try reversing this one:
-chris
Name: Fix cpumask iterator over empty cpu set Status: Trivial
Can't use _ffs() without first checking for zero, and if bits beyond NR_CPUS set it'll give bogus results. Use find_first_bit
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .26180-linux-2.6.6-rc2-bk5/include/asm-generic/cpumask_arith.h .26180-linux-2.6.6-rc2-bk5.updated/include/asm-generic/cpumask_arith.h --- .26180-linux-2.6.6-rc2-bk5/include/asm-generic/cpumask_arith.h 2004-01-10 13:59:33.000000000 +1100 +++ .26180-linux-2.6.6-rc2-bk5.updated/include/asm-generic/cpumask_arith.h 2004-04-28 09:50:23.000000000 +1000 @@ -43,7 +43,7 @@ #define cpus_promote(map) ({ map; }) #define cpumask_of_cpu(cpu) ({ ((cpumask_t)1) << (cpu); }) -#define first_cpu(map) __ffs(map) +#define first_cpu(map) find_first_bit(&(map), NR_CPUS) #define next_cpu(cpu, map) find_next_bit(&(map), NR_CPUS, cpu + 1) #endif /* __ASM_GENERIC_CPUMASK_ARITH_H */
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