Marc-Jano Knopp <[email protected]> wrote:
>
> Hi!
>
> A year ago, I wrote a small mlockall()-wrapper ("noswap") to make
> certain programs unswappable. It used to work perfectly, until I
> upgraded to kernel 2.6.x (2.6.13.1 in my case, but that shouldn't
> matter), which made the mlockall() execute without error, but also
> without any effect (the "L" in the STAT column of "ps axf" which
> indicates locked pages is missing).
>
Question is: what kernel version did you upgrade from?
Prior to 2.4.18 the kernel would allow MCL_FUTURE to propagate into child
processes. But that was disabled in 2.4.18 and later. I seem to recall
that we did this because inheriting MCL_FUTURE is standards-incorrect.
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