lwn.git/arch/x86_64/kernel/vmlinux.lds.S, branch docs-next

x86_64: move kernel

2007-10-11T09:17:24+00:00

Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

x86_64: prepare shared kernel/vmlinux.lds.S

2007-10-11T09:14:21+00:00

Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

x86_64: Squash initial_code modpost warnings

2007-07-22T18:03:38+00:00

Get rid of warnings like WARNING: vmlinux.o(.bootstrap.text+0x1a8): Section mismatch: reference to .init.text:x86_64_start_kernel (between 'initial_code' and 'init_rsp') - Move initialization code into .text.head like i386 because modpost knows about this already - Mark initial_code .initdata Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds

x86_64: remove __smp_alt* sections

2007-07-22T01:37:14+00:00

Leftovers from the removal of the more general (but abandoned) SMP alternatives. Signed-off-by: Jan Beulich Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds

x86: PM_TRACE support

2007-07-22T01:37:10+00:00

Signed-off-by: Nigel Cunningham Cc: Randy Dunlap Cc: "Rafael J. Wysocki" Cc: Pavel Machek Acked-by: Linus Torvalds Signed-off-by: Andrew Morton Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds

x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu

2007-07-22T01:37:08+00:00

This implements new vDSO for x86-64. The concept is similar to the existing vDSOs on i386 and PPC. x86-64 has had static vsyscalls before, but these are not flexible enough anymore. A vDSO is a ELF shared library supplied by the kernel that is mapped into user address space. The vDSO mapping is randomized for each process for security reasons. Doing this was needed for clock_gettime, because clock_gettime always needs a syscall fallback and having one at a fixed address would have made buffer overflow exploits too easy to write. The vdso can be disabled with vdso=0 It currently includes a new gettimeofday implemention and optimized clock_gettime(). The gettimeofday implementation is slightly faster than the one in the old vsyscall. clock_gettime is significantly faster than the syscall for CLOCK_MONOTONIC and CLOCK_REALTIME. The new calls are generally faster than the old vsyscall. Advantages over the old x86-64 vsyscalls: - Extensible - Randomized - Cleaner - Easier to virtualize (the old static address range previously causes overhead e.g. for Xen because it has to create special page tables for it) Weak points: - glibc support still to be written The VM interface is partly based on Ingo Molnar's i386 version. Includes compile fix from Joachim Deguara Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds

x86_64: Put allocated ELF notes in read-only data segment

2007-07-19T17:04:47+00:00

This changes the x86_64 linker script to use the asm-generic NOTES macro so that ELF note sections with SHF_ALLOC set are linked into the kernel image along with other read-only data. The PT_NOTE also points to their location. This paves the way for putting useful build-time information into ELF notes that can be found easily later in a kernel memory dump. Signed-off-by: Roland McGrath Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

define new percpu interface for shared data

2007-07-19T17:04:44+00:00

per cpu data section contains two types of data. One set which is exclusively accessed by the local cpu and the other set which is per cpu, but also shared by remote cpus. In the current kernel, these two sets are not clearely separated out. This can potentially cause the same data cacheline shared between the two sets of data, which will result in unnecessary bouncing of the cacheline between cpus. One way to fix the problem is to cacheline align the remotely accessed per cpu data, both at the beginning and at the end. Because of the padding at both ends, this will likely cause some memory wastage and also the interface to achieve this is not clean. This patch: Moves the remotely accessed per cpu data (which is currently marked as ____cacheline_aligned_in_smp) into a different section, where all the data elements are cacheline aligned. And as such, this differentiates the local only data and remotely accessed data cleanly. Signed-off-by: Fenghua Yu Acked-by: Suresh Siddha Cc: Rusty Russell Cc: Christoph Lameter Cc: Cc: "Luck, Tony" Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

all-archs: consolidate .data section definition in asm-generic

2007-05-19T07:11:57+00:00

With this consolidation we can now modify the .data section definition in one spot for all archs. Signed-off-by: Sam Ravnborg

all-archs: consolidate .text section definition in asm-generic

2007-05-19T07:11:57+00:00

Move definition of .text section to asm-generic. Signed-off-by: Sam Ravnborg