kernel.git/arch/ia64/kernel/ivt.S, branch linux-3.11.y

cputime: Generic on-demand virtual cputime accounting

2013-01-27T18:23:27Z

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

Disintegrate asm/system.h for IA64

2012-03-28T17:30:02Z

Disintegrate asm/system.h for IA64. Signed-off-by: David Howells Acked-by: Tony Luck cc: linux-ia64@vger.kernel.org

Merge branch 'for-35' of git://repo.or.cz/linux-kbuild

2010-06-01T15:55:52Z

* 'for-35' of git://repo.or.cz/linux-kbuild: (81 commits) kbuild: Revert part of e8d400a to resolve a conflict kbuild: Fix checking of scm-identifier variable gconfig: add support to show hidden options that have prompts menuconfig: add support to show hidden options which have prompts gconfig: remove show_debug option gconfig: remove dbg_print_ptype() and dbg_print_stype() kconfig: fix zconfdump() kconfig: some small fixes add random binaries to .gitignore kbuild: Include gen_initramfs_list.sh and the file list in the .d file kconfig: recalc symbol value before showing search results .gitignore: ignore *.lzo files headerdep: perlcritic warning scripts/Makefile.lib: Align the output of LZO kbuild: Generate modules.builtin in make modules_install Revert "kbuild: specify absolute paths for cscope" kbuild: Do not unnecessarily regenerate modules.builtin headers_install: use local file handles headers_check: fix perl warnings export_report: fix perl warnings ...

Rename .text.ivt to .text..ivt.

2010-03-03T10:26:00Z

Signed-off-by: Denys Vlasenko Signed-off-by: Michal Marek

[IA64] Remove COMPAT_IA32 support

2010-02-08T18:42:17Z

This has been broken since May 2008 when Al Viro killed altroot support. Since nobody has complained, it would appear that there are no users of this code (A plausible theory since the main OSVs that support ia64 prefer to use the IA32-EL software emulation). Signed-off-by: Tony Luck

ia64/pv_ops: paravirtualize mov = ar.itc.

2009-03-26T17:50:22Z

paravirtualize mov reg = ar.itc. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck

ia64/pv_ops: fix paravirtualization of ivt.S with CONFIG_SMP=n

2008-10-17T16:50:09Z

When CONFIG_SMP=n, three instruction in ivt.S were missed to paravirtualize. paravirtualize them. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck

[IA64] pv_ops: fix ivt.S paravirtualization

2008-08-04T17:52:12Z

Recent kernels are not booting on some HP systems (though it does boot on others). James and Willy reported the problem. James did the bisection to find the commit that caused the problem: 498c5170472ff0c03a29d22dbd33225a0be038f4. [IA64] pvops: paravirtualize ivt.S Two instructions were wrongly paravirtualized such that _FROM_ macro had been used where _TO_ was intended Cc: James Bottomley Cc: "Wilcox, Matthew R" Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck

[IA64] pv_ops: move some functions in ivt.S to avoid lack of space.

2008-05-28T16:41:58Z

move interrupt, page_fault, non_syscall, dispatch_unaligned_handler and dispatch_to_fault_handler to avoid lack of instructin space. The change set 4dcc29e1574d88f4465ba865ed82800032f76418 bloated SAVE_MIN_WITH_COVER, SAVE_MIN_WITH_COVER_R19 so that it bloated the functions which uses those macros. In the native case, only dispatch_illegal_op_fault had to be moved. When paravirtualized case the all functions which use the macros need to be moved to avoid the lack of space. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck

[IA64] pvops: paravirtualize ivt.S

2008-05-27T22:03:29Z

paravirtualize ivt.S which implements fault handler in hand written assembly code. They includes sensitive or performance critical privileged instructions. So they need paravirtualization. Cc: Keith Owens Cc: tgingold@free.fr Cc: Akio Takebe Signed-off-by: Yaozu (Eddie) Dong Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck