Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 18 Apr 2005 22:07:12 +0200 | From | Bernhard Fischer <> | Subject | Re: [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation |
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On Mon, Apr 18, 2005 at 09:40:40PM +0200, Arjan van de Ven wrote: >On Mon, 2005-04-18 at 11:25 -0500, Timur Tabi wrote: >> Arjan van de Ven wrote: >> >> > this is a myth; linux is free to move the page about in physical memory >> > even if it's mlock()ed!! darn, yes, this is true. I know people who introduced #define VM_RESERVED 0x00080000 /* Don't unmap it from swap_out */ to vm_flags just because of this. I'll just hold my breath and won't delve further. >> >> Then Linux has a very odd definition of the word "locked". >> >> > And even then, the user can munlock the memory from another thread etc >> > etc. Not a good idea. >> >> Well, that's okay, because then the app is doing something stupid, so we don't worry about >> that. > >you should since that physical page can be reused, say by a root >process, and you'd be majorly screwed - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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