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| author | Vlastimil Babka <vbabka@suse.cz> | 2018-08-23 17:21:29 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-24 16:55:17 +0300 |
| commit | 6a012288d6906fee1dbc244050ade1dafe4a9c8d (patch) | |
| tree | 17fddd5df13eec3bfa5731fa6619bad7c26418c3 /fs/eventfd.c | |
| parent | b0a182f875689647b014bc01d36b340217792852 (diff) | |
| download | linux-6a012288d6906fee1dbc244050ade1dafe4a9c8d.tar.xz | |
x86/speculation/l1tf: Suggest what to do on systems with too much RAM
Two users have reported [1] that they have an "extremely unlikely" system
with more than MAX_PA/2 memory and L1TF mitigation is not effective.
Make the warning more helpful by suggesting the proper mem=X kernel boot
parameter to make it effective and a link to the L1TF document to help
decide if the mitigation is worth the unusable RAM.
[1] https://bugzilla.suse.com/show_bug.cgi?id=1105536
Suggested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/966571f0-9d7f-43dc-92c6-a10eec7a1254@suse.cz
Diffstat (limited to 'fs/eventfd.c')
0 files changed, 0 insertions, 0 deletions