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| Filename | Latest commit message | Latest commit date |
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6b89d4c1ae
On Intel Westmere, a cmdline as follows: $ perf record -e cpu/event=0xc4,umask=0x2,name=br_inst_retired.near_call/p .... was failing. Yet the event+ umask support PEBS. It turns out this is due to a bug in the the PEBS event constraint table for westmere. All forms of BR_INST_RETIRED.* support PEBS. Therefore the constraint mask should ignore the umask. The name of the macro INTEL_FLAGS_EVENT_CONSTRAINT() hint that this is the case but it was not. That macros was checking both the event code and event umask. Therefore, it was only matching on 0x00c4. There are code+umask macros, they all have *UEVENT*. This bug fixes the issue by checking only the event code in the mask. Both single and range version are modified. Signed-off-by: Stephane Eranian <eranian@google.com> Cc: 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 <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Link: http://lkml.kernel.org/r/20190509214556.123493-1-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.