/* * Copyright (c) 2008 Silicon Graphics, Inc. * 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. * * This program is distributed in the hope that it would 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 the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_IOCTL_H__ #define __XFS_IOCTL_H__ extern int xfs_ioc_space( struct file *filp, unsigned int cmd, xfs_flock64_t *bf); int xfs_ioc_swapext( xfs_swapext_t *sxp); extern int xfs_find_handle( unsigned int cmd, xfs_fsop_handlereq_t *hreq); extern int xfs_open_by_handle( struct file *parfilp, xfs_fsop_handlereq_t *hreq); extern int xfs_readlink_by_handle( struct file *parfilp, xfs_fsop_handlereq_t *hreq); extern int xfs_attrmulti_attr_get( struct inode *inode, unsigned char *name, unsigned char __user *ubuf, __uint32_t *len, __uint32_t flags); extern int xfs_attrmulti_attr_set( struct inode *inode, unsigned char *name, const unsigned char __user *ubuf, __uint32_t len, __uint32_t flags); extern int xfs_attrmulti_attr_remove( struct inode *inode, unsigned char *name, __uint32_t flags); extern struct dentry * xfs_handle_to_dentry( struct file *parfilp, void __user *uhandle, u32 hlen); extern long xfs_file_ioctl( struct file *filp, unsigned int cmd, unsigned long p); extern long xfs_file_compat_ioctl( struct file *file, unsigned int cmd, unsigned long arg); extern int xfs_set_dmattrs( struct xfs_inode *ip, u_int evmask, u_int16_t state); #endif it.cgi/linux/net-next.git/commit/tools/perf/Documentation/perf-lock.txt?id=dd86e373e09fb16b83e8adf5c48c421a4ca76468'>commitdiff
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 23:58:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 08:37:27 +0100
commitdd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree55703c2ea8584e303e342090614e0aab3509ab21 /tools/perf/Documentation/perf-lock.txt
parent0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)
perf/x86/intel/rapl: Make package handling more robust
The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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