Adrian Bunk writes:
that's not a check whether the system supports SMP.
Looking at the source code of MySQL, it seems MySQL does some dirty
tricks for using the inlines from asm/atomic.h in userspace.
It's _really_ wrong to do this.
#JG
So the really, really stupid, idiotic, yet quick and effective hack to
get MySQL to build under a later 2.6 kernel is as follows. In
mysql-4.1.12/include/my_global.h, right after the three #ifndef
CONFIG_SMP lines, add these lines...
#ifndef CONFIG_NR_CPUS
#define CONFIG_NR_CPUS
#endif /* CONFIG_NR_CPUS */
This way, MySQL can continue depending on the SMP atomic macros in
asm-i386 from the Linux kernel, without going into kernel space. I
strongly doubt this is truly multithreaded (or SMP) safe, but that's how
MySQL has been running since 4.0 at least. Someone in the know should
fix this, and end this silliness.
John Gilbert
Thanks for ignoring the sig.
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