Fenghua Yu a0195f314a x86/resctrl: Don't move a task to the same resource group ... Shakeel Butt reported in [1] that a user can request a task to be moved to a resource group even if the task is already in the group. It just wastes time to do the move operation which could be costly to send IPI to a different CPU. Add a sanity check to ensure that the move operation only happens when the task is not already in the resource group. [1] https://lore.kernel.org/lkml/CALvZod7E9zzHwenzf7objzGKsdBmVwTgEJ0nPgs0LUFU3SN5Pw@mail.gmail.com/ Fixes: e02737d5b8 ("x86/intel_rdt: Add tasks files") Reported-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tony Luck <tony.luck@intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/962ede65d8e95be793cb61102cca37f7bb018e66.1608243147.git.reinette.chatre@intel.com		2021-01-08 09:08:03 +01:00
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core.c	- Add logic to correct MBM total and local values fixing errata SKX99 and BDF102	2020-12-14 13:53:17 -08:00
ctrlmondata.c	x86/resctrl: Add struct rdt_cache::arch_has_{sparse, empty}_bitmaps	2020-08-19 10:41:40 +02:00
internal.h	- Add logic to correct MBM total and local values fixing errata SKX99 and BDF102	2020-12-14 13:53:17 -08:00
Makefile	x86/resctrl: Avoid confusion over the new X86_RESCTRL config	2019-02-02 10:34:52 +01:00
monitor.c	- Add logic to correct MBM total and local values fixing errata SKX99 and BDF102	2020-12-14 13:53:17 -08:00
pseudo_lock_event.h	x86/resctrl: Rename and move rdt files to a separate directory	2018-11-22 20:16:18 +01:00
pseudo_lock.c	mremap: don't allow MREMAP_DONTUNMAP on special_mappings and aio	2020-12-15 12:13:41 -08:00
rdtgroup.c	x86/resctrl: Don't move a task to the same resource group	2021-01-08 09:08:03 +01:00