From: Matthew Wilcox <willy@infradead.org>
To: Xishi Qiu <qiuxishi@huawei.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
Michal Hocko <mhocko@kernel.org>,
Mel Gorman <mgorman@techsingularity.net>,
LKML <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>,
"Wujiangtao (A)" <wu.wujiangtao@huawei.com>
Subject: Re: [RFC] mm: why vfree() do not free page table memory?
Date: Wed, 17 Jan 2018 06:17:04 -0800 [thread overview]
Message-ID: <20180117141704.GA10398@bombadil.infradead.org> (raw)
In-Reply-To: <5A5F1C09.9040000@huawei.com>
On Wed, Jan 17, 2018 at 05:48:57PM +0800, Xishi Qiu wrote:
> > Did you notice an actual issue, or is this just theoretical concern.
>
> Yes, we have this problem on our production line.
> I find the page table memory takes 200-300M.
200MB? That's mapping 800GB of virtual address space. That must be
quite the module you're loading there ...
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prev parent reply other threads:[~2018-01-17 14:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-29 8:58 Xishi Qiu
2018-01-11 1:27 ` Xishi Qiu
2018-01-17 9:16 ` Vlastimil Babka
2018-01-17 9:48 ` Xishi Qiu
2018-01-17 13:14 ` Vlastimil Babka
2018-01-17 14:17 ` Matthew Wilcox [this message]
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