Le mardi 06 octobre 2015 à 09:26 -0400, Kenneth Adam Miller a écrit : > Any body know about the issue of assigning a process a region of > physical memory to use for it's malloc and free? I'd like to just > have the process call through to a UIO driver with an ioctl, and then > once that's done it gets all it's memory from a specific region. > You mean CONFIG_UIO_DMEM_GENIRQ (drivers/uio/uio_dmem_genirq.c) See: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a0c3b5a24bd802b1ebbf99e0b01296647b8199b http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b533a83008c3fb4983c1213276790cacd39b518f https://www.kernel.org/doc/htmldocs/uio-howto/using-uio_dmem_genirq.html PS: please don't top post reply as it makes it difficult to parse the discussion. > On Tue, Oct 6, 2015 at 1:21 AM, Greg KH <greg@xxxxxxxxx> wrote: > > On Mon, Oct 05, 2015 at 07:07:51PM -0400, Kenneth Adam Miller > > wrote: > > > So, I'm reading about UIO devices and user processes for mapping > > memory into > > > userland, and basically I have just a couple questions: > > > > > > What happens when a userland processes has allocated some > > resource from a > > > driver that is facilitating UIO, but then subsequently crashes? > > I'd like to > > > know that the driver can (or how you would enable such) recover > > the resources > > > so that the next user process can acquire them, instead of them > > being lost. > > > > Have you tried this? All of your resources should be freed > > properly, if > > not, let the uio maintainers know. > > > > thanks, > > Regards. -- Yann Droneaud OPTEYA _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
