/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * uptodate.h * * Cluster uptodate tracking * * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. * * 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; either * version 2 of the License, or (at your option) any later version. * * 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., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef OCFS2_UPTODATE_H #define OCFS2_UPTODATE_H /* * The caching code relies on locking provided by the user of * struct ocfs2_caching_info. These operations connect that up. */ struct ocfs2_caching_operations { /* * A u64 representing the owning structure. Usually this * is the block number (i_blkno or whatnot). This is used so * that caching log messages can identify the owning structure. */ u64 (*co_owner)(struct ocfs2_caching_info *ci); /* The superblock is needed during I/O. */ struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci); /* * Lock and unlock the caching data. These will not sleep, and * should probably be spinlocks. */ void (*co_cache_lock)(struct ocfs2_caching_info *ci); void (*co_cache_unlock)(struct ocfs2_caching_info *ci); /* * Lock and unlock for disk I/O. These will sleep, and should * be mutexes. */ void (*co_io_lock)(struct ocfs2_caching_info *ci); void (*co_io_unlock)(struct ocfs2_caching_info *ci); }; int __init init_ocfs2_uptodate_cache(void); void exit_ocfs2_uptodate_cache(void); void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci, const struct ocfs2_caching_operations *ops); void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci); void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci); u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci); void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci); void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci); int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci, struct buffer_head *bh); void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci, struct buffer_head *bh); void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, struct buffer_head *bh); void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci, struct buffer_head *bh); void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, sector_t block, u32 c_len); int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, struct buffer_head *bh); #endif /* OCFS2_UPTODATE_H */ cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>root/sound/soc/blackfin/bfin-eval-adau1373.c
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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-02-03 14:18:39 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100
commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch)
treec666f7a26b860674848949e39a610222b0723f89 /sound/soc/blackfin/bfin-eval-adau1373.c
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 'sound/soc/blackfin/bfin-eval-adau1373.c')