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c100a58360
User-space utilities examining crash-kernels need to know if the crashed kernel was in 5-level paging mode or not. So write 'pgtable_l5_enabled' to vmcoreinfo, which covers these three cases: pgtable_l5_enabled == 0 when: - Compiled with !CONFIG_X86_5LEVEL - Compiled with CONFIG_X86_5LEVEL=y while CPU has no 'la57' flag pgtable_l5_enabled != 0 when: - Compiled with CONFIG_X86_5LEVEL=y and CPU has 'la57' flag Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: douly.fnst@cn.fujitsu.com Cc: dyoung@redhat.com Cc: ebiederm@xmission.com Cc: kirill.shutemov@linux.intel.com Cc: vgoyal@redhat.com Link: http://lkml.kernel.org/r/20180302051801.19594-1-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.