linux-kernel - Re: [PATCH 5/6] KVM: selftests: memslot_perf

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Date:   Tue, 18 Oct 2022 10:47:20 +0300
From:   Oliver Upton <oliver.upton@...ux.dev>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>,
        Gavin Shan <gshan@...hat.com>, kvmarm@...ts.cs.columbia.edu,
        kvmarm@...ts.linux.dev, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, ajones@...tanamicro.com,
        pbonzini@...hat.com, maz@...nel.org, shuah@...nel.org,
        peterx@...hat.com, ricarkol@...gle.com, zhenyzha@...hat.com,
        shan.gavin@...il.com
Subject: Re: [PATCH 5/6] KVM: selftests: memslot_perf_test: Consolidate
 memory sizes

On Mon, Oct 17, 2022 at 10:08:48PM +0000, Sean Christopherson wrote:
> On Mon, Oct 17, 2022, Maciej S. Szmigiero wrote:
> > > +#define MEM_EXTRA_SIZE		0x10000
> >
> > Also, an expression like "(64 << 10)" is more readable than a "1"
> > with a tail of zeroes (it's easy to add one zero too many or be one
> > zero short).
> 
> +1 to not open coding raw numbers.
> 
> I think it's high time KVM selftests add #defines for the common sizes, e.g. SIZE_4KB,
> 16KB, 64K, 2MB, 1GB, etc...
> 
> Alternatively (or in addition), just #define 1KB, 1MB, 1GB, and 1TB, and then do
> math off of those.

I mean I love boilerplate as much as the next guy, but we can just use
tools/include/linux/sizes.h

--
Thanks,
Oliver