[PATCH] fadvise(2) system call

[Ed Schouten]

* John Baldwin <jhb at freebsd.org>, 20111031 22:17:
> They don't.  They use fadvise() which is part of Linux's API much as 
> madvise(2) is part of ours.  (See the other fork in this thread.)

Huh? Wait. It seems fadvise() is only a name used by the Linux kernel.
It's not exported by glibc as a symbol. At least not on my laptop
(Ubuntu 11.10).

> (ed at mekker) ~ $ man fadvise
> No manual entry for fadvise
> (ed at mekker) ~ $ fgrep -r fadvise /usr/include | grep -v posix_fadvise
> /usr/include/x86_64-linux-gnu/bits/syscall.h:#define SYS_fadvise64 __NR_fadvise64
> /usr/include/x86_64-linux-gnu/bits/syscall.h:#define SYS_fadvise64_64 __NR_fadvise64_64
> /usr/include/x86_64-linux-gnu/asm/unistd_64.h:#define __NR_fadvise64				221
> /usr/include/x86_64-linux-gnu/asm/unistd_64.h:__SYSCALL(__NR_fadvise64, sys_fadvise64)
> /usr/include/x86_64-linux-gnu/asm/unistd_32.h:#define __NR_fadvise64		250
> /usr/include/x86_64-linux-gnu/asm/unistd_32.h:#define __NR_fadvise64_64	272
> /usr/include/asm-generic/unistd.h:/* mm/fadvise.c */
> /usr/include/asm-generic/unistd.h:#define __NR3264_fadvise64 223
> /usr/include/asm-generic/unistd.h:__SC_COMP(__NR3264_fadvise64, sys_fadvise64_64, compat_sys_fadvise64_64)
> /usr/include/asm-generic/unistd.h:#define __NR_fadvise64 1053
> /usr/include/asm-generic/unistd.h:__SYSCALL(__NR_fadvise64, sys_fadvise64)
> /usr/include/asm-generic/unistd.h:#define __NR_fadvise64 __NR3264_fadvise64
> /usr/include/asm-generic/unistd.h:#define __NR_fadvise64_64 __NR3264_fadvise64
> (ed at mekker) ~ $ nm -D /lib/x86_64-linux-gnu/libc.so.6 | grep fadvise
> 00000000000d59e0 T posix_fadvise
> 00000000000d59e0 T posix_fadvise64

-- 
 Ed Schouten <ed at 80386.nl>
 WWW: http://80386.nl/
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