In article <3BF04289.8FC8B7B7@zip.com.au>,
Andrew Morton <akpm@zip.com.au> wrote:
>
>It's tar. It cheats. It somehow detects that the
>output is /dev/null, and so it doesn't read the input files.
Probably the kernel.
If you do a mmap()+write(), the write() to /dev/null won't even read the
mmap contents, which in turn will cause the pages to never be brought
in.
Anything which uses mmap+write will show this.
Linus
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This archive was generated by hypermail 2b29 : Thu Nov 15 2001 - 21:00:30 EST