/*
* quota.c - NTFS kernel quota ($Quota) handling. Part of the Linux-NTFS
* project.
*
* Copyright (c) 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
*/
#ifdef NTFS_RW
#include "index.h"
#include "quota.h"
#include "debug.h"
#include "ntfs.h"
/**
* ntfs_mark_quotas_out_of_date - mark the quotas out of date on an ntfs volume
* @vol: ntfs volume on which to mark the quotas out of date
*
* Mark the quotas out of date on the ntfs volume @vol and return 'true' on
* success and 'false' on error.
*/
bool ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
{
ntfs_index_context *ictx;
QUOTA_CONTROL_ENTRY *qce;
const le32 qid = QUOTA_DEFAULTS_ID;
int err;
ntfs_debug("Entering.");
if (NVolQuotaOutOfDate(vol))
goto done;
if (!vol->quota_ino || !vol->quota_q_ino) {
ntfs_error(vol->sb, "Quota inodes are not open.");
return false;
}
inode_lock(vol->quota_q_ino);
ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
if (!ictx) {
ntfs_error(vol->sb, "Failed to get index context.");
goto err_out;
}
err = ntfs_index_lookup(&qid, sizeof(qid), ictx);
if (err) {
if (err == -ENOENT)
ntfs_error(vol->sb, "Quota defaults entry is not "
"present.");
else
ntfs_error(vol->sb, "Lookup of quota defaults entry "
"failed.");
goto err_out;
}
if (ictx->data_len < offsetof(QUOTA_CONTROL_ENTRY, sid)) {
ntfs_error(vol->sb, "Quota defaults entry size is invalid. "
"Run chkdsk.");
goto err_out;
}
qce = (QUOTA_CONTROL_ENTRY*)ictx->data;
if (le32_to_cpu(qce->version) != QUOTA_VERSION) {
ntfs_error(vol->sb, "Quota defaults entry version 0x%x is not "
"supported.", le32_to_cpu(qce->version));
goto err_out;
}
ntfs_debug("Quota defaults flags = 0x%x.", le32_to_cpu(qce->flags));
/* If quotas are already marked out of date, no need to do anything. */
if (qce->flags & QUOTA_FLAG_OUT_OF_DATE)
goto set_done;
/*
* If quota tracking is neither requested, nor enabled and there are no
* pending deletes, no need to mark the quotas out of date.
*/
if (!(qce->flags & (QUOTA_FLAG_TRACKING_ENABLED |
QUOTA_FLAG_TRACKING_REQUESTED |
QUOTA_FLAG_PENDING_DELETES)))
goto set_done;
/*
* Set the QUOTA_FLAG_OUT_OF_DATE bit thus marking quotas out of date.
* This is verified on WinXP to be sufficient to cause windows to
* rescan the volume on boot and update all quota entries.
*/
qce->flags |= QUOTA_FLAG_OUT_OF_DATE;
/* Ensure the modified flags are written to disk. */
ntfs_index_entry_flush_dcache_page(ictx);
ntfs_index_entry_mark_dirty(ictx);
set_done:
ntfs_index_ctx_put(ictx);
inode_unlock(vol->quota_q_ino);
/*
* We set the flag so we do not try to mark the quotas out of date
* again on remount.
*/
NVolSetQuotaOutOfDate(vol);
done:
ntfs_debug("Done.");
return true;
err_out:
if (ictx)
ntfs_index_ctx_put(ictx);
inode_unlock(vol->quota_q_ino);
return false;
}
#endif /* NTFS_RW */
'>3
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>