linux-kernel - Re: [PATCH 14/30] memblock: add align parameter to memblock_alloc

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Message-ID: <20180926093648.GP6278@dhcp22.suse.cz>
Date:   Wed, 26 Sep 2018 11:36:48 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Mike Rapoport <rppt@...ux.vnet.ibm.com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Chris Zankel <chris@...kel.net>,
        "David S. Miller" <davem@...emloft.net>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greentime Hu <green.hu@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guan Xuetao <gxt@....edu.cn>, Ingo Molnar <mingo@...hat.com>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Jonas Bonn <jonas@...thpole.se>,
        Jonathan Corbet <corbet@....net>,
        Ley Foon Tan <lftan@...era.com>,
        Mark Salter <msalter@...hat.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Matt Turner <mattst88@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Simek <monstr@...str.eu>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Burton <paul.burton@...s.com>,
        Richard Kuo <rkuo@...eaurora.org>,
        Richard Weinberger <richard@....at>,
        Rich Felker <dalias@...c.org>,
        Russell King <linux@...linux.org.uk>,
        Serge Semin <fancer.lancer@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tony Luck <tony.luck@...el.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-c6x-dev@...ux-c6x.org, linux-hexagon@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...ux-mips.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
        linux-um@...ts.infradead.org, nios2-dev@...ts.rocketboards.org,
        openrisc@...ts.librecores.org, sparclinux@...r.kernel.org,
        uclinux-h8-devel@...ts.sourceforge.jp
Subject: Re: [PATCH 14/30] memblock: add align parameter to
 memblock_alloc_node()

On Wed 26-09-18 11:31:27, Michal Hocko wrote:
> On Fri 14-09-18 15:10:29, Mike Rapoport wrote:
> > With the align parameter memblock_alloc_node() can be used as drop in
> > replacement for alloc_bootmem_pages_node() and __alloc_bootmem_node(),
> > which is done in the following patches.
> 
> /me confused. Why do we need this patch at all? Maybe it should be
> folded into the later patch you are refereing here?

OK, I can see 1536927045-23536-17-git-send-email-rppt@...ux.vnet.ibm.com
now. If you are going to repost for whatever reason please merge those
two. Also I would get rid of the implicit "0 implies SMP_CACHE_BYTES"
behavior. It is subtle and you have to dig deep to find that out. Why
not make it explicit?
-- 
Michal Hocko
SUSE Labs