On 4/21/07, Hugh Dickins <[email protected]> wrote:
But the Linux MADV_DONTNEED does throw away
data from a PROT_WRITE,MAP_PRIVATE mapping (or brk or stack) - those
changes are discarded, and a subsequent access will revert to zeroes
or the underlying mapped file. Been like that since before 2.4.0.
I didn't say it changed. I just say that there is a hole in the
current implementation as it does not allow to implement
POSIX_MADV_DONTNEED with anything but a no-op. The
POSIX_MADV_DONTNEED behavior is useful and something IMO should be
added to allow implementing it.
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