On Mon, Apr 22, 2013 at 10:22 AM, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote: > Read Al's email again: https://lkml.org/lkml/2013/3/20/458 > > I don't know much about VFS locking, but the ashmem locking seems > pretty bogus to me. Why can't multiple threads read() at the same > time? ashmem originally did not support read or write operations, just mmap, which is all 99% of users want. The original concurrency model with per-mapping ashmem_mutex's works fine there. It is only with the later addition of read and write that locking becomes a cluster. If there isn't an obvious way to refactor the locking, I'd suggest removing read and write. Robert _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
