linux/kernel/fork.c, branch v2.6.21-rc7

[PATCH] initialise pi_lock if CONFIG_RT_MUTEXES=N

2007-03-17T02:25:06Z

Fixes a bogus lockdep warning which causes lockdep to disable itself. Acked-by: Ingo Molnar Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] hrtimers: namespace and enum cleanup

2007-02-16T16:13:58Z

- hrtimers did not use the hrtimer_restart enum and relied on the implict int representation. Fix the prototypes and the functions using the enums. - Use seperate name spaces for the enumerations - Convert hrtimer_restart macro to inline function - Add comments No functional changes. [akpm@osdl.org: fix input driver] Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Cc: john stultz Cc: Roman Zippel Cc: Dmitry Torokhov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] tty: update the tty layer to work with struct pid

2007-02-12T17:48:32Z

Of kernel subsystems that work with pids the tty layer is probably the largest consumer. But it has the nice virtue that the assiation with a session only lasts until the session leader exits. Which means that no reference counting is required. So using struct pid winds up being a simple optimization to avoid hash table lookups. In the long term the use of pid_nr also ensures that when we have multiple pid spaces mixed everything will work correctly. Signed-off-by: Eric W. Biederman Cc: Alan Cox Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] ifdef ->rchar, ->wchar, ->syscr, ->syscw from task_struct

2007-02-11T19:18:07Z

They are fat: 4x8 bytes in task_struct. They are uncoditionally updated in every fork, read, write and sendfile. They are used only if you have some "extended acct fields feature". And please, please, please, read(2) knows about bytes, not characters, why it is called "rchar"? Signed-off-by: Alexey Dobriyan Cc: Jay Lan Cc: Balbir Singh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] fork_idle() should be cpuinit, not devinit

2007-02-02T00:17:06Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

Revert "[PATCH] namespaces: fix exit race by splitting exit"

2007-01-30T21:35:18Z

This reverts commit 7a238fcba0629b6f2edbcd37458bae56fcf36be5 in preparation for a better and simpler fix proposed by Eric Biederman (and fixed up by Serge Hallyn) Acked-by: Serge E. Hallyn Signed-off-by: Linus Torvalds

[PATCH] namespaces: fix exit race by splitting exit

2007-01-30T16:26:44Z

Fix exit race by splitting the nsproxy putting into two pieces. First piece reduces the nsproxy refcount. If we dropped the last reference, then it puts the mnt_ns, and returns the nsproxy as a hint to the caller. Else it returns NULL. The second piece of exiting task namespaces sets tsk->nsproxy to NULL, and drops the references to other namespaces and frees the nsproxy only if an nsproxy was passed in. A little awkward and should probably be reworked, but hopefully it fixes the NFS oops. Signed-off-by: Serge E. Hallyn Cc: Herbert Poetzl Cc: Oleg Nesterov Cc: "Eric W. Biederman" Cc: Cedric Le Goater Cc: Daniel Hokka Zakrisson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Optimize D-cache alias handling on fork

2006-12-13T17:27:08Z

Virtually index, physically tagged cache architectures can get away without cache flushing when forking. This patch adds a new cache flushing function flush_cache_dup_mm(struct mm_struct *) which for the moment I've implemented to do the same thing on all architectures except on MIPS where it's a no-op. Signed-off-by: Ralf Baechle Signed-off-by: Linus Torvalds

[PATCH] fdtable: Remove the free_files field

2006-12-10T17:57:22Z

An fdtable can either be embedded inside a files_struct or standalone (after being expanded). When an fdtable is being discarded after all RCU references to it have expired, we must either free it directly, in the standalone case, or free the files_struct it is contained within, in the embedded case. Currently the free_files field controls this behavior, but we can get rid of it entirely, as all the necessary information is already recorded. We can distinguish embedded and standalone fdtables using max_fds, and if it is embedded we can divine the relevant files_struct using container_of(). Signed-off-by: Vadim Lobanov Cc: Christoph Hellwig Cc: Al Viro Cc: Dipankar Sarma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] fdtable: Make fdarray and fdsets equal in size

2006-12-10T17:57:22Z

Currently, each fdtable supports three dynamically-sized arrays of data: the fdarray and two fdsets. The code allows the number of fds supported by the fdarray (fdtable->max_fds) to differ from the number of fds supported by each of the fdsets (fdtable->max_fdset). In practice, it is wasteful for these two sizes to differ: whenever we hit a limit on the smaller-capacity structure, we will reallocate the entire fdtable and all the dynamic arrays within it, so any delta in the memory used by the larger-capacity structure will never be touched at all. Rather than hogging this excess, we shouldn't even allocate it in the first place, and keep the capacities of the fdarray and the fdsets equal. This patch removes fdtable->max_fdset. As an added bonus, most of the supporting code becomes simpler. Signed-off-by: Vadim Lobanov Cc: Christoph Hellwig Cc: Al Viro Cc: Dipankar Sarma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

linux/kernel/fork.c, branch v2.6.21-rc7

[PATCH] initialise pi_lock if CONFIG_RT_MUTEXES=N

[PATCH] hrtimers: namespace and enum cleanup

[PATCH] tty: update the tty layer to work with struct pid

[PATCH] ifdef ->rchar, ->wchar, ->syscr, ->syscw from task_struct

[PATCH] fork_idle() should be __cpuinit, not __devinit

Revert "[PATCH] namespaces: fix exit race by splitting exit"

[PATCH] namespaces: fix exit race by splitting exit

[PATCH] Optimize D-cache alias handling on fork

[PATCH] fdtable: Remove the free_files field

[PATCH] fdtable: Make fdarray and fdsets equal in size

[PATCH] fork_idle() should be cpuinit, not devinit