linux-kernel - Re: [PATCH] memcg: Replace mm->owner with mm->memcg

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Message-ID: <20180504110751.GM4535@dhcp22.suse.cz>
Date:   Fri, 4 May 2018 13:07:51 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Kirill Tkhai <ktkhai@...tuozzo.com>, akpm@...ux-foundation.org,
        peterz@...radead.org, oleg@...hat.com, viro@...iv.linux.org.uk,
        mingo@...nel.org, paulmck@...ux.vnet.ibm.com,
        keescook@...omium.org, riel@...hat.com, tglx@...utronix.de,
        kirill.shutemov@...ux.intel.com, marcos.souza.org@...il.com,
        hoeun.ryu@...il.com, pasha.tatashin@...cle.com, gs051095@...il.com,
        dhowells@...hat.com, rppt@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org,
        Balbir Singh <balbir@...ux.vnet.ibm.com>,
        Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] memcg: Replace mm->owner with mm->memcg

I am getting the following for nommu with MEMCG=y randconfig:
kernel/fork.o: In function `mm_init':
fork.c:(.text+0x948): undefined reference to `mm_update_memcg'
kernel/fork.o: In function `mmput':
fork.c:(.text+0x119c): undefined reference to `mm_update_memcg'
make: *** [vmlinux] Error 1

I am sorry but I didn't get to look at it much more but I suspect you
just have to move mm_update_memcg up before mem_cgroup_do_precharge.
-- 
Michal Hocko
SUSE Labs