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Hello, Following my discussion with Andi. Here is a patch that introduces two new TIF flags to simplify the context switch code in __switch_to(). The idea is to minimize the number of cache lines accessed in the common case, i.e., when neither the debug registers nor the I/O bitmap are used. This patch covers the x86-64 modifications. A patch for i386 follows. Changelog: - add TIF_DEBUG to track when debug registers are active - add TIF_IO_BITMAP to track when I/O bitmap is used - modify __switch_to() to use the new TIF flags <signed-off-by>: eranian@hpl.hp.com Signed-off-by: Andi Kleen <ak@suse.de> |
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| .. | ||
| audit.c | ||
| fpu32.c | ||
| ia32_aout.c | ||
| ia32_binfmt.c | ||
| ia32_signal.c | ||
| ia32entry.S | ||
| ipc32.c | ||
| Makefile | ||
| mmap32.c | ||
| ptrace32.c | ||
| sys_ia32.c | ||
| syscall32_syscall.S | ||
| syscall32.c | ||
| tls32.c | ||
| vsyscall-sigreturn.S | ||
| vsyscall-syscall.S | ||
| vsyscall-sysenter.S | ||
| vsyscall.lds | ||