linux.git/arch/ia64/kernel/entry.S, branch v3.11

cputime: Generic on-demand virtual cputime accounting

2013-01-27T18:23:27+00:00

If we want to stop the tick further idle, we need to be
able to account the cputime without using the tick.

Virtual based cputime accounting solves that problem by
hooking into kernel/user boundaries.

However implementing CONFIG_VIRT_CPU_ACCOUNTING require
low level hooks and involves more overhead. But we already
have a generic context tracking subsystem that is required
for RCU needs by archs which plan to shut down the tick
outside idle.

This patch implements a generic virtual based cputime
accounting that relies on these generic kernel/user hooks.

There are some upsides of doing this:

- This requires no arch code to implement CONFIG_VIRT_CPU_ACCOUNTING
if context tracking is already built (already necessary for RCU in full
tickless mode).

- We can rely on the generic context tracking subsystem to dynamically
(de)activate the hooks, so that we can switch anytime between virtual
and tick based accounting. This way we don't have the overhead
of the virtual accounting when the tick is running periodically.

And one downside:

- There is probably more overhead than a native virtual based cputime
accounting. But this relies on hooks that are already set anyway.

Signed-off-by: Frederic Weisbecker 
Cc: Andrew Morton 
Cc: Ingo Molnar 
Cc: Li Zhong 
Cc: Namhyung Kim 
Cc: Paul E. McKenney 
Cc: Paul Gortmaker 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: Thomas Gleixner

Wire up finit_module syscall

2013-01-03T18:57:23+00:00

Linux was granted a new system call to load modules by file descriptor
in commit 34e1169d996a ("module: add syscall to load module from fd").

Wire it up for ia64 (ready for the Chrome port :-)

Signed-off-by: Tony Luck 
Signed-off-by: Linus Torvalds

flagday: kill pt_regs argument of do_fork()

2012-11-29T05:01:08+00:00

Signed-off-by: Al Viro

ia64: switch to generic sys_execve()

2012-10-19T18:28:40+00:00

Acked-by: Tony Luck 
Tested-by: Tony Luck 
Signed-off-by: Al Viro

ia64: switch to generic kernel_thread()/kernel_execve()

2012-10-19T18:28:09+00:00

Acked-by: Tony Luck 
Tested-by: Tony Luck 
Signed-off-by: Al Viro

ia64: clone() had been unused since 2004

2012-10-14T23:33:53+00:00

Used to be used by kernel_thread(); dead code for 8 years...
Note that it's not sys_clone/sys_clone2 - those are used just
fine.

Signed-off-by: Al Viro

ia64: Add accept4() syscall

2012-01-09T20:55:10+00:00

While debugging udev > 170 failure on Debian Wheezy
(http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=648325), it appears
that the issue was in fact due to missing accept4() in ia64.

This patch simply adds accept4() to ia64.

Signed-off-by: Émeric Maschino 
Signed-off-by: Tony Luck

[IA64] Wire up cross memory attach syscalls

2011-11-02T21:00:26+00:00

Add sys_process_vm_readv and sys_process_vm_writev to ia64
syscall table. Passes tests at http://ozlabs.org/~cyeoh/cma/cma-test-20110718.tgz

Signed-off-by: Tony Luck

All Arch: remove linkage for sys_nfsservctl system call

2011-08-26T22:09:58+00:00

The nfsservctl system call is now gone, so we should remove all
linkage for it.

Signed-off-by: NeilBrown 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Linus Torvalds

[IA64] wire up sendmmsg() syscall for Itanium

2011-05-31T17:09:24+00:00

Add entries in unistd.h and entry.S to make this new syscall visible.

Signed-off-by: Tony Luck