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    Subject[Patch 4/8] ia64: implement crashkernel=auto

    Since in patch 2/8 we already implement the generic part, this will
    add the rest part for ia64.

    Signed-off-by: WANG Cong <amwang@redhat.com>
    Cc: Fenghua Yu <fenghua.yu@intel.com>
    Cc: Tony Luck <tony.luck@intel.com>

    ---

    Index: linux-2.6/arch/ia64/include/asm/kexec.h
    ===================================================================
    --- linux-2.6.orig/arch/ia64/include/asm/kexec.h
    +++ linux-2.6/arch/ia64/include/asm/kexec.h
    @@ -1,6 +1,7 @@
    #ifndef _ASM_IA64_KEXEC_H
    #define _ASM_IA64_KEXEC_H

    +#include <asm-generic/kexec.h>

    /* Maximum physical address we can use pages from */
    #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
    @@ -19,6 +20,49 @@
    flush_icache_range(page_addr, page_addr + PAGE_SIZE); \
    } while(0)

    +#ifdef CONFIG_KEXEC_AUTO_RESERVE
    +#define MBYTES(n) ((n)*1024*1024ULL)
    +#define GBYTES(n) ((n)*1024*1024*1024ULL)
    +/*
    + Memory size Reserved memory
    + =========== ===============
    + [4G, 12G) 256M
    + [12G, 128G) 512M
    + [128G, 256G) 768M
    + [256G, 378G) 1024M
    + [378G, 512G) 1536M
    + [512G, 768G) 2048M
    + [768G, ) 3072M
    + */
    +static inline
    +unsigned long long arch_default_crash_size(unsigned long long total_size)
    +{
    + unsigned long long ret;
    +
    + if (total_size >= GBYTES(4) && total_size < GBYTES(12))
    + ret = MBYTES(256);
    + else if (total_size >= GBYTES(12) && total_size < GBYTES(128))
    + ret = MBYTES(512);
    + else if (total_size >= GBYTES(128) && total_size < GBYTES(256))
    + ret = MBYTES(768);
    + else if (total_size >= GBYTES(256) && total_size < GBYTES(378))
    + ret = MBYTES(1024);
    + else if (total_size >= GBYTES(318) && total_size < GBYTES(512))
    + ret = MBYTES(1536);
    + else if (total_size >= GBYTES(512) && total_size < GBYTES(768))
    + ret = MBYTES(2048);
    + else
    + ret = MBYTES(3072);
    + if (!ia64_platform_is("sn2") && !ia64_platform_is("uv"))
    + if (ret > GBYTES(4))
    + ret = ret / GBYTES(4) * MBYTES(256);
    + return ret;
    +}
    +#undef GBYTES
    +#undef MBYTES
    +#define arch_default_crash_size arch_default_crash_size
    +#endif
    +
    extern struct kimage *ia64_kimage;
    extern const unsigned int relocate_new_kernel_size;
    extern void relocate_new_kernel(unsigned long, unsigned long,

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      Last update: 2009-08-27 05:21    [W:0.032 / U:2.384 seconds]
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