linux-kernel - Re: [PATCH] mm: page_alloc: document kmemleak's non-blockable __GFP

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Message-ID: <20190715131732.GX29483@dhcp22.suse.cz>
Date:   Mon, 15 Jul 2019 15:17:32 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Yang Shi <yang.shi@...ux.alibaba.com>
Cc:     dvyukov@...gle.com, catalin.marinas@....com,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: page_alloc: document kmemleak's non-blockable
 __GFP_NOFAIL case

On Sat 13-07-19 04:49:04, Yang Shi wrote:
> When running ltp's oom test with kmemleak enabled, the below warning was
> triggerred since kernel detects __GFP_NOFAIL & ~__GFP_DIRECT_RECLAIM is
> passed in:

kmemleak is broken and this is a long term issue. I thought that
Catalin had something to address this.

While this patch only adds a comment and discourages future changes of
the warning which is fine and probably something that we should do,
kmemleak really should be fixed sooner than later.
-- 
Michal Hocko
SUSE Labs