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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2015-04-16 14:47:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-04-23 16:52:01 +0200
commit7e01b5acd88b3f3108d8c4ce44e3205d67437202 (patch)
tree8278dc40fdf14dedb0b89435a659de3fd413faec /include
parent27cf3a16b2535a490f8cf1d29a6634f1c70f7831 (diff)
kexec: allocate the kexec control page with KEXEC_CONTROL_MEMORY_GFP
Introduce KEXEC_CONTROL_MEMORY_GFP to allow the architecture code to override the gfp flags of the allocation for the kexec control page. The loop in kimage_alloc_normal_control_pages allocates pages with GFP_KERNEL until a page is found that happens to have an address smaller than the KEXEC_CONTROL_MEMORY_LIMIT. On systems with a large memory size but a small KEXEC_CONTROL_MEMORY_LIMIT the loop will keep allocating memory until the oom killer steps in. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kexec.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index e60a745ac198..e804306ef5e8 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -40,6 +40,10 @@
#error KEXEC_CONTROL_MEMORY_LIMIT not defined
#endif
+#ifndef KEXEC_CONTROL_MEMORY_GFP
+#define KEXEC_CONTROL_MEMORY_GFP GFP_KERNEL
+#endif
+
#ifndef KEXEC_CONTROL_PAGE_SIZE
#error KEXEC_CONTROL_PAGE_SIZE not defined
#endif