tools, vm: new option to specify kpageflags file
page-types currently hardcodes /proc/kpageflags as the file to parse. This works when using the tool to examine the state of pageflags on the same system, but does not allow storing a snapshot of pageflags at a given time to debug issues nor on a different system. This allows the user to specify a saved version of kpageflags with a new page-types -F option. [akpm@linux-foundation.org: add "filename" to fix usage() string] [rientjes@google.com: fix layout] Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1801301840050.140969@chino.kir.corp.google.com Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1801301458180.153857@chino.kir.corp.google.comSigned-off-by: NDavid Rientjes <rientjes@google.com> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Reviewed-by: NNaoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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