On Wed, Oct 6, 2010 at 6:37 PM, MK <stardust...@gmail.com> wrote: > Hi list, > > I want to "move pages" from one userspace process to another userspace > process. The reason to do this is to avoid the overhead of copying. I > could ofcourse use shared memory but unfortunately, the data I have is > being generated by a third party vendor and I have no control over > where it gets generated. All I get is a few pages of data that I now > want to "gift" to the other process.
You just need to update the destination process's page table entries to point to the page & delete the existing page table mappings from the source process. Thats all you need to do to achieve this. Venkatram Tummala > > I looked at vmsplice and splice but neither seem to fit the bill. > vmsplice can be used only to move into a pipe but not out. splice is > apparently currently broken, and even then, the moving is only > advisory , it can end up copying if it wants to. > > I am wondering how I can go about writing something like this? Is > this idea just fundamentally impossible in linux or can I somehow > implement it? > > Thanks a lot, > MK > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecar...@nl.linux.org > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecar...@nl.linux.org Please read the FAQ at http://kernelnewbies.org/FAQ
