linux/kernel/exit.c, branch v2.6.14-rc1

[PATCH] files: files struct with RCU

2005-09-09T20:57:55Z

Patch to eliminate struct files_struct.file_lock spinlock on the reader side and use rcu refcounting rcuref_xxx api for the f_count refcounter. The updates to the fdtable are done by allocating a new fdtable structure and setting files->fdt to point to the new structure. The fdtable structure is protected by RCU thereby allowing lock-free lookup. For fd arrays/sets that are vmalloced, we use keventd to free them since RCU callbacks can't sleep. A global list of fdtable to be freed is not scalable, so we use a per-cpu list. If keventd is already handling the current cpu's work, we use a timer to defer queueing of that work. Since the last publication, this patch has been re-written to avoid using explicit memory barriers and use rcu_assign_pointer(), rcu_dereference() premitives instead. This required that the fd information is kept in a separate structure (fdtable) and updated atomically. Signed-off-by: Dipankar Sarma Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] files: break up files struct

2005-09-09T20:57:55Z

In order for the RCU to work, the file table array, sets and their sizes must be updated atomically. Instead of ensuring this through too many memory barriers, we put the arrays and their sizes in a separate structure. This patch takes the first step of putting the file table elements in a separate structure fdtable that is embedded withing files_struct. It also changes all the users to refer to the file table using files_fdtable() macro. Subsequent applciation of RCU becomes easier after this. Signed-off-by: Dipankar Sarma Signed-Off-By: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] revert "timer exit cleanup"

2005-08-04T23:57:49Z

Revert this June 17 patch: it broke persistence of timers across execve(). Cc: Roland McGrath Cc: george anzinger Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Update cfq io scheduler to time sliced design

2005-06-27T21:33:29Z

This updates the CFQ io scheduler to the new time sliced design (cfq v3). It provides full process fairness, while giving excellent aggregate system throughput even for many competing processes. It supports io priorities, either inherited from the cpu nice value or set directly with the ioprio_get/set syscalls. The latter closely mimic set/getpriority. This import is based on my latest from -mm. Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds

[PATCH] Optimize sys_times for a single thread process

2005-06-23T16:45:30Z

Avoid taking the tasklist_lock in sys_times if the process is single threaded. In a NUMA system taking the tasklist_lock may cause a bouncing cacheline if multiple independent processes continually call sys_times to measure their performance. Signed-off-by: Christoph Lameter Signed-off-by: Shai Fultheim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] avoid resursive oopses

2005-06-23T16:45:20Z

Prevent recursive faults in do_exit() by leaving the task alone and wait for reboot. This may allow a more graceful shutdown and possibly save the original oops. Signed-off-by: Alexander Nyberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] timer exit cleanup

2005-06-17T17:03:50Z

Do all timer zapping in exit_itimers. Signed-off-by: Ingo Molnar Signed-off-by: Linus Torvalds

[patch] MCA recovery module undefined symbol fix

2005-05-03T20:58:17Z

The patch "MCA recovery improvements" added do_exit to mca_drv.c. That's fine when the mca recovery code is built in the kernel (CONFIG_IA64_MCA_RECOVERY=y) but breaks building the mca recovery code as a module (CONFIG_IA64_MCA_RECOVERY=m). Most users are currently building this as a module, as loading and unloading the module provides a very convenient way to turn on/off error recovery. This patch exports do_exit, so mca_drv.c can build as a module. Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck

[PATCH] make lots of things static

2005-05-01T15:59:29Z

Another large rollup of various patches from Adrian which make things static where they were needlessly exported. Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] DocBook: changes and extensions to the kernel documentation

2005-05-01T15:59:25Z

I have recompiled Linux kernel 2.6.11.5 documentation for me and our university students again. The documentation could be extended for more sources which are equipped by structured comments for recent 2.6 kernels. I have tried to proceed with that task. I have done that more times from 2.6.0 time and it gets boring to do same changes again and again. Linux kernel compiles after changes for i386 and ARM targets. I have added references to some more files into kernel-api book, I have added some section names as well. So please, check that changes do not break something and that categories are not too much skewed. I have changed kernel-doc to accept "fastcall" and "asmlinkage" words reserved by kernel convention. Most of the other changes are modifications in the comments to make kernel-doc happy, accept some parameters description and do not bail out on errors. Changed to @pid in the description, moved some #ifdef before comments to correct function to comments bindings, etc. You can see result of the modified documentation build at http://cmp.felk.cvut.cz/~pisa/linux/lkdb-2.6.11.tar.gz Some more sources are ready to be included into kernel-doc generated documentation. Sources has been added into kernel-api for now. Some more section names added and probably some more chaos introduced as result of quick cleanup work. Signed-off-by: Pavel Pisa Signed-off-by: Martin Waitz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds