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authorThomas Gleixner <tglx@linutronix.de>2008-02-09 23:24:09 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-02-09 23:24:09 +0100
commit76ebd0548df6ee48586e9b80d8fc2f58aa5fb51c (patch)
tree10af366ea643126913cd588aa46741961be1d7cb /include/asm-x86/cacheflush.h
parenta03c2a48e02aacaaea211c94691b729be357e047 (diff)
x86: introduce page pool in cpa
DEBUG_PAGEALLOC was not possible on 64-bit due to its early-bootup hardcoded reliance on PSE pages, and the unrobustness of the runtime splitup of large pages. The splitup ended in recursive calls to alloc_pages() when a page for a pte split was requested. Avoid the recursion with a preallocated page pool, which is used to split up large mappings and gets refilled in the return path of kernel_map_pages after the split has been done. The size of the page pool is adjusted to the available memory. This part just implements the page pool and the initialization w/o using it yet. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/cacheflush.h')
-rw-r--r--include/asm-x86/cacheflush.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86/cacheflush.h b/include/asm-x86/cacheflush.h
index 8dd8c5e3cc7..6a22212b4b2 100644
--- a/include/asm-x86/cacheflush.h
+++ b/include/asm-x86/cacheflush.h
@@ -44,6 +44,8 @@ int set_memory_np(unsigned long addr, int numpages);
void clflush_cache_range(void *addr, unsigned int size);
+void cpa_init(void);
+
#ifdef CONFIG_DEBUG_RODATA
void mark_rodata_ro(void);
#endif