[PATCH] x86_64: Basic reorder infrastructure
Changes
5 files changed · +1321 −0
| File | Status | Add | Del | Content |
|---|---|---|---|---|
| arch/x86_64/Kconfig | modified | +8 | −0 | View file |
| arch/x86_64/Makefile | modified | +1 | −0 | View file |
| arch/x86_64/kernel/functionlist | added | +1286 | −0 | View file |
| arch/x86_64/kernel/vmlinux.lds.S | modified | +5 | −0 | View file |
| scripts/profile2linkerlist.pl | added | +21 | −0 | View file |
Only the first 600 diff lines are shown. Download the complete patch.
arch/x86_64/Kconfig
View filediff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 9fad9df..24a3016 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -464,6 +464,14 @@ config SECCOMP
source kernel/Kconfig.hz
+config REORDER
+ bool "Function reordering"
+ default n
+ help
+ This option enables the toolchain to reorder functions for a more
+ optimal TLB usage. If you have pretty much any version of binutils,
+ this can increase your kernel build time by roughly one minute.
+
endmenu
#
arch/x86_64/Makefile
View filediff --git a/arch/x86_64/Makefile b/arch/x86_64/Makefile
index f5e48ba..0fbc028 100644
--- a/arch/x86_64/Makefile
+++ b/arch/x86_64/Makefile
@@ -36,6 +36,7 @@ CFLAGS += -m64
CFLAGS += -mno-red-zone
CFLAGS += -mcmodel=kernel
CFLAGS += -pipe
+cflags-$(CONFIG_REORDER) += -ffunction-sections
# this makes reading assembly source easier, but produces worse code
# actually it makes the kernel smaller too.
CFLAGS += -fno-reorder-blocks
arch/x86_64/kernel/functionlist
View filediff --git a/arch/x86_64/kernel/functionlist b/arch/x86_64/kernel/functionlist
new file mode 100644
index 0000000..2bcebdc
--- /dev/null
+++ b/arch/x86_64/kernel/functionlist
@@ -0,0 +1,1286 @@
+*(.text.flush_thread)
+*(.text.check_poison_obj)
+*(.text.copy_page)
+*(.text.__set_personality)
+*(.text.gart_map_sg)
+*(.text.kmem_cache_free)
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+*(.text._raw_spin_lock)
+*(.text.ide_outb)
+*(.text.unmap_vmas)
+*(.text.copy_page_range)
+*(.text.kprobe_handler)
+*(.text.__handle_mm_fault)
+*(.text.__d_lookup)
+*(.text.copy_user_generic)
+*(.text.__link_path_walk)
+*(.text.get_page_from_freelist)
+*(.text.kmem_cache_alloc)
+*(.text.drive_cmd_intr)
+*(.text.ia32_setup_sigcontext)
+*(.text.huge_pte_offset)
+*(.text.do_page_fault)
+*(.text.page_remove_rmap)
+*(.text.release_pages)
+*(.text.ide_end_request)
+*(.text.__mutex_lock_slowpath)
+*(.text.__find_get_block)
+*(.text.kfree)
+*(.text.vfs_read)
+*(.text._raw_spin_unlock)
+*(.text.free_hot_cold_page)
+*(.text.fget_light)
+*(.text.schedule)
+*(.text.memcmp)
+*(.text.touch_atime)
+*(.text.__might_sleep)
+*(.text.__down_read_trylock)
+*(.text.arch_pick_mmap_layout)
+*(.text.find_vma)
+*(.text.__make_request)
+*(.text.do_generic_mapping_read)
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+*(.text.__generic_file_aio_read)
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+*(.text.__wake_up_bit)
+*(.text.add_to_page_cache)
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+*(.text.ide_intr)
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arch/x86_64/kernel/vmlinux.lds.S
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scripts/profile2linkerlist.pl
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