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MDEV-6450 - MariaDB crash on Power8 when built with advance tool chain
Part of this work is based on Stewart Smitch's memory barrier and lower priori patches for power8. - Added memory syncronization for innodb & xtradb for power8. - Added HAVE_WINDOWS_MM_FENCE to CMakeList.txt - Added os_isync to fix a syncronization problem on power - Added log_get_lsn_nowait which is now used srv_error_monitor_thread to ensur if log mutex is locked. All changes done both for InnoDB and Xtradb
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/* Copyright (c) 2013, MariaDB foundation Ab and SkySQL | ||
This program is free software; you can redistribute it and/or modify | ||
it under the terms of the GNU General Public License as published by | ||
the Free Software Foundation; version 2 of the License. | ||
This program is distributed in the hope that it will be useful, | ||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
GNU General Public License for more details. | ||
You should have received a copy of the GNU General Public License | ||
along with this program; if not, write to the Free Software | ||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1307 USA | ||
*/ | ||
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/* instructions for specific cpu's */ | ||
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/* | ||
Macros for adjusting thread priority (hardware multi-threading) | ||
The defines are the same ones used by the linux kernel | ||
*/ | ||
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#if defined(__powerpc__) | ||
/* Very low priority */ | ||
#define HMT_very_low() asm volatile("or 31,31,31") | ||
/* Low priority */ | ||
#define HMT_low() asm volatile("or 1,1,1") | ||
/* Medium low priority */ | ||
#define HMT_medium_low() asm volatile("or 6,6,6") | ||
/* Medium priority */ | ||
#define HMT_medium() asm volatile("or 2,2,2") | ||
/* Medium high priority */ | ||
#define HMT_medium_high() asm volatile("or 5,5,5") | ||
/* High priority */ | ||
#define HMT_high() asm volatile("or 3,3,3") | ||
#else | ||
#define HMT_very_low() | ||
#define HMT_low() | ||
#define HMT_medium_low() | ||
#define HMT_medium() | ||
#define HMT_medium_high() | ||
#define HMT_high() | ||
#endif |
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