linux-kernel - Re: [PATCH] mm: Fix the pgtable leak

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Message-ID: <20190213113312.GA34988@google.com>
Date:   Wed, 13 Feb 2019 20:33:12 +0900
From:   Minchan Kim <minchan@...nel.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Liu Bo <bo.liu@...ux.alibaba.com>, stable@...r.kernel.org,
        Martin Liu <liumartin@...gle.com>
Subject: Re: [PATCH] mm: Fix the pgtable leak

On Wed, Feb 13, 2019 at 08:29:00PM +0900, Minchan Kim wrote:
> [1] was backported to v4.9 stable tree but it introduces pgtable
> memory leak because with fault retrial, preallocated pagetable
> could be leaked in second iteration.
> To fix the problem, this patch backport [2].
> 
> [1] 5cf3e5ff95876, mm, memcg: fix reclaim deadlock with writeback
> [2] b0b9b3df27d10, mm: stop leaking PageTables
> 
> Fixes: 5cf3e5ff95876 ("mm, memcg: fix reclaim deadlock with writeback")
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Cc: Michal Hocko <mhocko@...e.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: Liu Bo <bo.liu@...ux.alibaba.com>
> Cc: <stable@...r.kernel.org> [4.9]
> Signed-off-by: Minchan Kim <minchan@...nel.org>
Reported-by: Martin Liu <liumartin@...gle.com>