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38bb8d77d0
PT uses page sized ToPA tables, where the ToPA table resides at the bottom and its driver-specific metadata taking up a few words at the top of the page. The split is currently calculated manually and needs to be redone every time a field is added to or removed from the metadata structure. Also, the 32-bit version can be made smaller. By splitting the table and metadata into separate structures, we are making the compiler figure out the division of the page. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/20190821124727.73310-5-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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