[PATCH] fix infinite loop eating all the memory

[Colin Leroy]

Hi,

As noticed by Con Kolivas:
http://article.gmane.org/gmane.linux.kernel.ck/4045

`tail -f /dev/zero` eats all the available memory and swap until tail
gets killed by the OOM killer (on linux, at least).

The attached patch fixes it; it may not be perfect, but I think this
issue is worth fixing, so it can be a start.

Thanks,
-- 
Colin

tail_oom.patch
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