user/sven/linux-bitkeeper.git/ipc/sem.c, branch master

Audit IPC object owner/permission changes.

2005-03-01T09:15:37Z

Add linked list of auxiliary data to audit_context Add callbacks in IPC_SET functions to record requested changes. Signed-off-by: David Woodhouse

[PATCH] fix missing wakeup in ipc/sem

2005-01-04T13:34:13Z

My patch that removed the spin_lock calls from the tail of sys_semtimedop introduced a bug: Before my patch was merged, every operation that altered an array called update_queue. That call woke up threads that were waiting until a semaphore value becomes 0. I've accidentially removed that call. The attached patch fixes that by modifying update_queue: the function now loops internally and wakes up all threads. The patch also removes update_queue calls from the error path of sys_semtimedop: failed operations do not modify the array, no need to rescan the list of waiting threads. Signed-Off-By: Manfred Spraul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] RCU: eliminating explicit memory barriers from SysV IPC

2004-10-28T01:28:37Z

This patch uses the rcu_assign_pointer() API to eliminate a number of explicit memory barriers from the SysV IPC code that uses RCU. It also restructures the ipc_ids structure so that the array size is stored in the same memory block as the array itself (see the new struct ipc_id_ary). This prevents the race that the earlier code was subject to, where a reader could see a mismatch between the size and the actual array. With the size stored with the array, the possibility of mismatch is eliminated -- with out the need for careful ordering and explicit memory barriers. This has been tested successfully on i386 and ppc64. Signed-off-by: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] add missing linux/syscalls.h includes

2004-10-18T15:54:02Z

I found that the prototypes for sys_waitid and sys_fcntl in don't match the implementation. In order to keep all prototypes in sync in the future, now include the header from each file implementing any syscall. Signed-off-by: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] ipc: enforce SEMVMX limit for undo

2004-08-23T05:41:02Z

Independent from the other patches: undo operations should not result in out of range semaphore values. The test for newval > SEMVMX is missing. The attached patch adds the test and a comment. Signed-Off-By: Manfred Spraul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] ipc: remove sem_revalidate

2004-08-23T05:40:49Z

The attached patch removes sem_revalidate and replaces it with ipc_rcu_getref() calls followed by ipc_lock_by_ptr(). Signed-Off-By: Manfred Spraul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] ipc: Add refcount to ipc_rcu_alloc

2004-08-23T05:40:37Z

The lifetime of the ipc objects (sem array, msg queue, shm mapping) is controlled by kern_ipc_perms->lock - a spinlock. There is no simple way to reacquire this spinlock after it was dropped to schedule()/kmalloc/copy_{to,from}_user/whatever. The attached patch adds a reference count as a preparation to get rid of sem_revalidate(). Signed-Off-By: Manfred Spraul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] sparse: NULL vs 0 - the rest of it

2004-06-30T08:52:08Z

[PATCH] sparse: ipc __user annotation

2004-05-29T04:12:47Z

[PATCH] ipc locking fix

2004-03-27T05:00:07Z

From: badari I ran into an ipc hang while trying to shutdown a database. The problem is due to missing sem_unlock() in find_undo().