From 69f239ed335a4b03265cae3ca930f3f166e42e35 Mon Sep 17 00:00:00 2001 From: Hendrik Brueckner Date: Thu, 12 Dec 2013 17:03:48 +0100 Subject: [PATCH] s390/cpum_sf: Dynamically extend the sampling buffer if overflows occur Improve the sampling buffer allocation and add a function to reallocate and increase the sampling buffer structure. The number of allocated buffer elements (sample-data-blocks) are accounted. You can control the minimum and maximum number these sample-data-blocks through the cpum_sfb_size kernel parameter. The number hardware sample overflows (if any) are also accounted and stored per perf event. During the PMU disable/enable calls, the accumulated overflow counter is analyzed and, if necessary, the sampling buffer is dynamically increased. Signed-off-by: Hendrik Brueckner Signed-off-by: Martin Schwidefsky --- Reading git-format-patch failed