Hello. Why it is allowed to call down_write() after lock_kernel() ? lock_kernel() uses a spinlock and the process must not sleep until unlock_kernel(), therefore that process must not use down_write() that might sleep, isn't it ? Is lock_kernel() a special spinlock and the process can call semaphore operations and kmalloc(GFP_KERNEL) ? lock_kernel() at http://lxr.linux.no/source/fs/namespace.c?v=2.4.28#L855 do_mount() at http://lxr.linux.no/source/fs/namespace.c?v=2.4.28#L700 do_add_mount() at http://lxr.linux.no/source/fs/namespace.c?v=2.4.28#L613 down_write() at http://lxr.linux.no/source/fs/namespace.c?v=2.4.28#L631 Regards. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
