At an aside... This may be useful. Or not.
Al Viro had an interesting idea about kernel<->userspace data passing
interfaces. He had suggested creating a task-specific filesystem
derived from ramfs. Through the normal VFS/VM codepaths, the user can
easily create [subject to resource/priv checks] a buffer that is locked
into the pagecache. Using mmap, read, write, whatever they prefer.
Derive from tmpfs, and the buffers are swappable.
Then it would be a simple matter to associate a file stored in
"keventfs" with a ring buffer guaranteed to be pagecache-friendly.
Heck, that might make zero-copy easier in some cases, too. And using a
filesystem would mean that you could do all this without adding
syscalls, by using special (poll-able!) files in the filesystem for
control and notification purposes.
Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]