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Ken'ichi Ohmichi 69243f9125 x86: Dump filtering supports x86_64 sparsemem ... This patch adds the symbol "init_level4_pgt" to the vmcoreinfo data so that makedumpfile (dump filtering command) supports x86_64 sparsemem kernel of linux-2.6.24. makedumpfile creates a small dumpfile by excluding unnecessary pages for the analysis. It checks attributes in page structures and distinguishes necessary pages and unnecessary ones. To check them, makedumpfile gets the vmcoreinfo data which has the minimum debugging information only for dump filtering. For older x86_64 kernel (linux-2.6.23 or before), makedumpfile translates the virtual address of page structure into physical address by subtracting PAGE_OFFSET from virtual address, but this translation isn't effective for linux-2.6.24 sparsemem kernel, because its page structures are in virtual memmap area. makedumpfile should translate their virtual address by 4-levels paging and it needs the symbol "init_level4_pgt". Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		18 years ago
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kernel	x86: Dump filtering supports x86_64 sparsemem	18 years ago
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