Revision a0195f314a25582b38993bf30db11c300f4f4611 authored by Fenghua Yu on 17 December 2020, 22:31:19 UTC, committed by Borislav Petkov on 08 January 2021, 08:08:03 UTC
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: e02737d5b826 ("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
1 parent ae28d1a
| File | Mode | Size |
|---|---|---|
| atmel_lcdc.h | -rw-r--r-- | 6.2 KB |
| aty128.h | -rw-r--r-- | 13.3 KB |
| broadsheetfb.h | -rw-r--r-- | 2.1 KB |
| cirrus.h | -rw-r--r-- | 5.7 KB |
| cvisionppc.h | -rw-r--r-- | 1.5 KB |
| da8xx-fb.h | -rw-r--r-- | 2.0 KB |
| display_timing.h | -rw-r--r-- | 3.1 KB |
| edid.h | -rw-r--r-- | 228 bytes |
| gbe.h | -rw-r--r-- | 10.4 KB |
| hecubafb.h | -rw-r--r-- | 1.5 KB |
| ili9320.h | -rw-r--r-- | 5.7 KB |
| imx-ipu-image-convert.h | -rw-r--r-- | 6.5 KB |
| imx-ipu-v3.h | -rw-r--r-- | 16.3 KB |
| kyro.h | -rw-r--r-- | 2.4 KB |
| mach64.h | -rw-r--r-- | 46.9 KB |
| maxinefb.h | -rw-r--r-- | 1.2 KB |
| metronomefb.h | -rw-r--r-- | 1.5 KB |
| mipi_display.h | -rw-r--r-- | 5.0 KB |
| mmp_disp.h | -rw-r--r-- | 7.0 KB |
| neomagic.h | -rw-r--r-- | 4.9 KB |
| newport.h | -rw-r--r-- | 18.7 KB |
| of_display_timing.h | -rw-r--r-- | 788 bytes |
| of_videomode.h | -rw-r--r-- | 367 bytes |
| omap-panel-data.h | -rw-r--r-- | 1.7 KB |
| omapfb_dss.h | -rw-r--r-- | 23.9 KB |
| omapvrfb.h | -rw-r--r-- | 1.8 KB |
| permedia2.h | -rw-r--r-- | 9.0 KB |
| platform_lcd.h | -rw-r--r-- | 440 bytes |
| pm3fb.h | -rw-r--r-- | 45.3 KB |
| pmag-ba-fb.h | -rw-r--r-- | 1.0 KB |
| pmagb-b-fb.h | -rw-r--r-- | 2.3 KB |
| pxa168fb.h | -rw-r--r-- | 2.5 KB |
| radeon.h | -rw-r--r-- | 109.2 KB |
| s1d13xxxfb.h | -rw-r--r-- | 9.9 KB |
| sa1100fb.h | -rw-r--r-- | 1.3 KB |
| samsung_fimd.h | -rw-r--r-- | 17.0 KB |
| sh_mobile_lcdc.h | -rw-r--r-- | 6.0 KB |
| sisfb.h | -rw-r--r-- | 606 bytes |
| sstfb.h | -rw-r--r-- | 11.0 KB |
| tdfx.h | -rw-r--r-- | 5.3 KB |
| tgafb.h | -rw-r--r-- | 6.9 KB |
| trident.h | -rw-r--r-- | 3.2 KB |
| udlfb.h | -rw-r--r-- | 2.9 KB |
| uvesafb.h | -rw-r--r-- | 2.9 KB |
| vga.h | -rw-r--r-- | 13.7 KB |
| videomode.h | -rw-r--r-- | 1.3 KB |
| w100fb.h | -rw-r--r-- | 3.6 KB |
Computing file changes ...
