I wrote:
> Rather than dig into the guts of glibc to find that out, though, I think
> we should just s/fallocate/posix_fallocate/g on this patch. The argument
> for using the former seemed pretty thin to begin with.
Pushed with that change; we'll soon see what the buildfarm thinks.
I suspect that the provisions for EINTR and ENOSYS errors may now be
dead code, since the Linux man page for posix_fallocate mentions
neither. They're not much code though, and POSIX itself *does*
list EINTR, so I'm hesitant to muck with that.
regards, tom lane