Messages in this thread | | | Date | Thu, 20 Aug 2020 13:00:54 -0500 | From | Yazen Ghannam <> | Subject | Re: [PATCH] x86/mce: Increase maximum number of banks to 64 |
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On Thu, Aug 20, 2020 at 07:15:18PM +0200, Borislav Petkov wrote: > On Thu, Aug 20, 2020 at 05:06:24PM +0000, Yazen Ghannam wrote: > > From: Akshay Gupta <Akshay.Gupta@amd.com> > > > > ...because future AMD systems will support up to 64 MCA banks per CPU. > > > > MAX_NR_BANKS is used to allocate a number of data structures, and it is > > used as a ceiling for values read from MCG_CAP[Count]. Therefore, this > > change will have no functional effect on existing systems with 32 or > > fewer MCA banks per CPU. > > Of course it will, grep for MAX_NR_BANKS and look at all those bitmaps > and arrays which get defined with MAX_NR_BANKS size. With your change, > they will double in size. > > How much does vmlinux size grow with your change? >
It seems to get smaller.
-rwxrwxr-x 1 yghannam yghannam 807634088 Aug 20 17:51 vmlinux-32banks -rwxrwxr-x 1 yghannam yghannam 807634072 Aug 20 17:50 vmlinux-64banks
Any ideas? Maybe there's some alignment change? Or a build issue on my end?
Thanks, Yazen
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