Rusty Russell wrote: > From: Paul TBBle Hampson <[EMAIL PROTECTED]> > > This creates a file in $HOME/.lguest/ to directly back the RAM and DMA memory > mappings created by map_zeroed_pages. >
I created a test program recently that measured the latency of a reads/writes to an mmap() file in /dev/shm and in a normal filesystem. Even after unlinking the underlying file, the write latency was much better with a mmap()'d file in /dev/shm. /dev/shm is not really for general use. I think we'll want to have our own tmpfs mount that we use to create VM images. I also prefer to use a unix socket for communication, unlink the file immediately after open, and then pass the fd via SCM_RIGHTS to the other process. Regards, Anthony Liguori _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
