>From the understang Linix Kernel book, it states that lock_kernel() and unlock_kernel() works on a spin lock called kernel_flag, which is mainly used to protect a wide vieriety of data structures including VFS/file handling, data structures related to networking, IPC structures, and several less important kernel data structrues. It states that not all the kernel data structures are protected by specific spin locks. With 2.2 it introduced many single ( smaller ) spin locks to have more concurrency. Aboo > -----Original Message----- > From: kernelnewbies-bounce@xxxxxxxxxxxx > [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Paul Akkermans > Sent: Tuesday, December 14, 2004 2:00 AM > To: Alexander Nyberg > Cc: kernel newbie > Subject: Re: kernel_lock() > > So kernel_lock() locks code properties? > ----- Original Message ----- > From: "Alexander Nyberg" <alexn@xxxxxxxxx> > To: "Paul Akkermans" <paulakkermans@xxxxxxxxxx> > Cc: "kernel newbie" <kernelnewbies@xxxxxxxxxxxx> > Sent: Monday, December 13, 2004 3:46 PM > Subject: Re: kernel_lock() > > > > On Mon, 2004-12-13 at 14:58 +0100, Paul Akkermans wrote: > >> Can anybody tell me what a kernel_lock() does precisely? > Does it lock > >> all the resources or lock the entire kernel? > >> > > > > Alan Cox explains: > > http://www.ussg.iu.edu/hypermail/linux/kernel/0409.1/2255.html > > > > If you're on lwn the kernel section has even more about it. > > > > > > > > -- > > Kernelnewbies: Help each other learn about the Linux kernel. > > Archive: http://mail.nl.linux.org/kernelnewbies/ > > FAQ: http://kernelnewbies.org/faq/ > > > > > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
