6727ad9e20
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Tested-by: Petr Mladek <pmladek@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
159 lines
2.4 KiB
ArmAsm
159 lines
2.4 KiB
ArmAsm
/*
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* ld script for the c6x kernel
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*
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* Copyright (C) 2010, 2011 Texas Instruments Incorporated
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* Mark Salter <msalter@redhat.com>
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#include <asm/page.h>
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ENTRY(_c_int00)
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#if defined(CONFIG_CPU_BIG_ENDIAN)
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jiffies = jiffies_64 + 4;
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#else
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jiffies = jiffies_64;
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#endif
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#define READONLY_SEGMENT_START \
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. = PAGE_OFFSET;
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#define READWRITE_SEGMENT_START \
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. = ALIGN(128); \
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_data_lma = .;
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SECTIONS
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{
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/*
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* Start kernel read only segment
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*/
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READONLY_SEGMENT_START
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.vectors :
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{
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_vectors_start = .;
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*(.vectors)
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. = ALIGN(0x400);
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_vectors_end = .;
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}
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/*
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* This section contains data which may be shared with other
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* cores. It needs to be a fixed offset from PAGE_OFFSET
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* regardless of kernel configuration.
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*/
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.virtio_ipc_dev :
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{
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*(.virtio_ipc_dev)
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}
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. = ALIGN(PAGE_SIZE);
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__init_begin = .;
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.init :
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{
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_sinittext = .;
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HEAD_TEXT
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INIT_TEXT
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_einittext = .;
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}
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INIT_DATA_SECTION(16)
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PERCPU_SECTION(128)
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. = ALIGN(PAGE_SIZE);
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__init_end = .;
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.text :
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{
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_text = .;
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_stext = .;
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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IRQENTRY_TEXT
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SOFTIRQENTRY_TEXT
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KPROBES_TEXT
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*(.fixup)
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*(.gnu.warning)
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}
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EXCEPTION_TABLE(16)
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NOTES
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RO_DATA_SECTION(PAGE_SIZE)
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.const :
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{
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*(.const .const.* .gnu.linkonce.r.*)
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*(.switch)
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}
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. = ALIGN (8) ;
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__fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET)
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{
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_fdt_start = . ; /* place for fdt blob */
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*(__fdt_blob) ; /* Any link-placed DTB */
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BYTE(0); /* section always has contents */
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. = _fdt_start + 0x4000; /* Pad up to 16kbyte */
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_fdt_end = . ;
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}
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_etext = .;
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/*
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* Start kernel read-write segment.
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*/
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READWRITE_SEGMENT_START
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_sdata = .;
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.fardata : AT(ADDR(.fardata) - LOAD_OFFSET)
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{
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INIT_TASK_DATA(THREAD_SIZE)
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NOSAVE_DATA
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PAGE_ALIGNED_DATA(PAGE_SIZE)
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CACHELINE_ALIGNED_DATA(128)
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READ_MOSTLY_DATA(128)
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DATA_DATA
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CONSTRUCTORS
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*(.data1)
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*(.fardata .fardata.*)
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*(.data.debug_bpt)
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}
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.neardata ALIGN(8) : AT(ADDR(.neardata) - LOAD_OFFSET)
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{
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*(.neardata2 .neardata2.* .gnu.linkonce.s2.*)
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*(.neardata .neardata.* .gnu.linkonce.s.*)
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. = ALIGN(8);
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}
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_edata = .;
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__bss_start = .;
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SBSS(8)
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BSS(8)
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.far :
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{
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. = ALIGN(8);
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*(.dynfar)
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*(.far .far.* .gnu.linkonce.b.*)
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. = ALIGN(8);
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}
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__bss_stop = .;
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_end = .;
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DWARF_DEBUG
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/DISCARD/ :
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{
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EXIT_TEXT
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EXIT_DATA
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EXIT_CALL
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*(.discard)
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*(.discard.*)
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*(.interp)
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}
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}
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