linux-kernel - Re: [PATCH v4 24/66] mm: Remove vmacache

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Message-ID: <848e85b8-208d-cefe-6674-4534a2d181ac@suse.cz>
Date:   Mon, 17 Jan 2022 18:01:48 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Liam Howlett <liam.howlett@...cle.com>,
        "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Michel Lespinasse <walken.cr@...il.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Minchan Kim <minchan@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Rom Lemarchand <romlem@...gle.com>
Subject: Re: [PATCH v4 24/66] mm: Remove vmacache

On 12/1/21 15:30, Liam Howlett wrote:
> From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
> 
> By using the maple tree and the maple tree state, the vmacache is no
> longer beneficial and is complicating the VMA code.  Remove the vmacache
> to reduce the work in keeping it up to date and code complexity.
> 
> Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>

Acked-by: Vlastimil Babka <vbabka@...e.cz>

"git grep -i vmacache" found these leftovers:

include/linux/mm_types_task.h:#define VMACACHE_BITS 2
include/linux/mm_types_task.h:#define VMACACHE_SIZE (1U << VMACACHE_BITS)
include/linux/mm_types_task.h:#define VMACACHE_MASK (VMACACHE_SIZE - 1)