linux-kernel - Re: [RFC PATCH 2/3] mm: Return bool from pagebit test functions

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Message-ID: <838190.1617984218@warthog.procyon.org.uk>
Date:   Fri, 09 Apr 2021 17:03:38 +0100
From:   David Howells <dhowells@...hat.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     dhowells@...hat.com, Matthew Wilcox <willy@...radead.org>,
        torvalds@...ux-foundation.org,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, jlayton@...nel.org, hch@....de,
        linux-cachefs@...hat.com, v9fs-developer@...ts.sourceforge.net,
        linux-afs@...ts.infradead.org, ceph-devel@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/3] mm: Return bool from pagebit test functions

David Howells <dhowells@...hat.com> wrote:

> add/remove: 2/2 grow/shrink: 15/16 up/down: 408/-599 (-191)
> Function                                     old     new   delta
> iomap_write_end_inline                         -     128    +128

I can get rid of the iomap_write_end_inline() increase for my config by
marking it __always_inline, thereby getting:

add/remove: 1/2 grow/shrink: 15/15 up/down: 280/-530 (-250)

It seems that the decision whether or not to inline iomap_write_end_inline()
is affected by the switch to bool.

David