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SubjectRe: [PATCH 4/4] perf, tools, script: Add brstackasm output for branch stacks
On Tue, Jan 03, 2017 at 01:00:29AM -0800, Andi Kleen wrote:

SNIP

> + len = grab_bb(buffer, start, end,
> + machine, thread, &x.is64bit,
> + &x.cpumode);
> + /* Patch up missing kernel transfers due to ring filters */

could you please provide more details on those ring filters? never heard of..

thanks,
jirka

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