linux-kernel - Re: [PATCH 3/5] KVM: selftests: Simplify demand_paging_test with timespec_diff

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Message-ID: <20201102212715.GD20600@xz-x1>
Date:   Mon, 2 Nov 2020 16:27:15 -0500
From:   Peter Xu <peterx@...hat.com>
To:     Ben Gardon <bgardon@...gle.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        Peter Shier <pshier@...gle.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Thomas Huth <thuth@...hat.com>,
        Peter Feiner <pfeiner@...gle.com>
Subject: Re: [PATCH 3/5] KVM: selftests: Simplify demand_paging_test with
 timespec_diff_now

On Tue, Oct 27, 2020 at 04:37:31PM -0700, Ben Gardon wrote:
> Add a helper function to get the current time and return the time since
> a given start time. Use that function to simplify the timekeeping in the
> demand paging test.

Nit: timespec_diff_now() sounds less charming than timespec_elapsed() to
me... "diff_now" is longer, and it also does not show positive/negative of the
results (which in this case should always be end-start). "elapsed" should
always mean something positive.

With/Without the change above:

Reviewed-by: Peter Xu <peterx@...hat.com>

-- 
Peter Xu