/* * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project. * * Copyright (c) 2001-2004 Anton Altaparmakov * * This program/include file 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; either version 2 of the License, or * (at your option) any later version. * * This program/include file 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 (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include "debug.h" /** * __ntfs_warning - output a warning to the syslog * @function: name of function outputting the warning * @sb: super block of mounted ntfs filesystem * @fmt: warning string containing format specifications * @...: a variable number of arguments specified in @fmt * * Outputs a warning to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the warning string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_warning is being * called. * * Note, you should be using debug.h::ntfs_warning(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */ void __ntfs_warning(const char *function, const struct super_block *sb, const char *fmt, ...) { struct va_format vaf; va_list args; int flen = 0; #ifndef DEBUG if (!printk_ratelimit()) return; #endif if (function) flen = strlen(function); va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; if (sb) pr_warn("(device %s): %s(): %pV\n", sb->s_id, flen ? function : "", &vaf); else pr_warn("%s(): %pV\n", flen ? function : "", &vaf); va_end(args); } /** * __ntfs_error - output an error to the syslog * @function: name of function outputting the error * @sb: super block of mounted ntfs filesystem * @fmt: error string containing format specifications * @...: a variable number of arguments specified in @fmt * * Outputs an error to the syslog for the mounted ntfs filesystem described * by @sb. * * @fmt and the corresponding @... is printf style format string containing * the error string and the corresponding format arguments, respectively. * * @function is the name of the function from which __ntfs_error is being * called. * * Note, you should be using debug.h::ntfs_error(@sb, @fmt, @...) instead * as this provides the @function parameter automatically. */ void __ntfs_error(const char *function, const struct super_block *sb, const char *fmt, ...) { struct va_format vaf; va_list args; int flen = 0; #ifndef DEBUG if (!printk_ratelimit()) return; #endif if (function) flen = strlen(function); va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; if (sb) pr_err("(device %s): %s(): %pV\n", sb->s_id, flen ? function : "", &vaf); else pr_err("%s(): %pV\n", flen ? function : "", &vaf); va_end(args); } #ifdef DEBUG /* If 1, output debug messages, and if 0, don't. */ int debug_msgs = 0; void __ntfs_debug(const char *file, int line, const char *function, const char *fmt, ...) { struct va_format vaf; va_list args; int flen = 0; if (!debug_msgs) return; if (function) flen = strlen(function); va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf); va_end(args); } /* Dump a runlist. Caller has to provide synchronisation for @rl. */ void ntfs_debug_dump_runlist(const runlist_element *rl) { int i; const char *lcn_str[5] = { "LCN_HOLE ", "LCN_RL_NOT_MAPPED", "LCN_ENOENT ", "LCN_unknown " }; if (!debug_msgs) return; pr_debug("Dumping runlist (values in hex):\n"); if (!rl) { pr_debug("Run list not present.\n"); return; } pr_debug("VCN LCN Run length\n"); for (i = 0; ; i++) { LCN lcn = (rl + i)->lcn; if (lcn < (LCN)0) { int index = -lcn - 1; if (index > -LCN_ENOENT - 1) index = 3; pr_debug("%-16Lx %s %-16Lx%s\n", (long long)(rl + i)->vcn, lcn_str[index], (long long)(rl + i)->length, (rl + i)->length ? "" : " (runlist end)"); } else pr_debug("%-16Lx %-16Lx %-16Lx%s\n", (long long)(rl + i)->vcn, (long long)(rl + i)->lcn, (long long)(rl + i)->length, (rl + i)->length ? "" : " (runlist end)"); if (!(rl + i)->length) break; } } #endif 22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch) treec666f7a26b860674848949e39a610222b0723f89 /net/bluetooth/bnep parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'net/bluetooth/bnep')