linux-kernel - Re: [PATCH v2 10/11] x86/mm: Be more consistent wrt PAGE_SHIFT vs PAGE

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Message-Id: <519997CE-E94C-40E3-96A7-48CA682B553E@gmail.com>
Date:   Mon, 22 May 2017 16:24:23 -0700
From:   Nadav Amit <nadav.amit@...il.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     X86 ML <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bpetkov@...e.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Rik van Riel <riel@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Nadav Amit <namit@...are.com>, Michal Hocko <mhocko@...e.com>,
        Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH v2 10/11] x86/mm: Be more consistent wrt PAGE_SHIFT vs
 PAGE_SIZE in tlb flush code

> 
> 	/* Balance as user space task's flush, a bit conservative */
> 	if (end == TLB_FLUSH_ALL ||
> -	    (end - start) > tlb_single_page_flush_ceiling * PAGE_SIZE) {
> +	    (end - start) > tlb_single_page_flush_ceiling >> PAGE_SHIFT) {

Shouldn’t it be << ?

Nadav