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From: Christian Brauner <christian.brauner@ubuntu.com>
To: Daniel Xu <dxu@dxuuu.xyz>
Cc: bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kernel-team@fb.com, jolsa@kernel.org, hannes@cmpxchg.org,
	yhs@fb.com
Subject: Re: [RFC bpf-next 0/1] bpf: Add page cache iterator
Date: Thu, 8 Apr 2021 09:51:17 +0200
Message-ID: <20210408075117.oqoqspilk3c3xsaa@wittgenstein> (raw)
In-Reply-To: <cover.1617831474.git.dxu@dxuuu.xyz>

On Wed, Apr 07, 2021 at 02:46:10PM -0700, Daniel Xu wrote:
> There currently does not exist a way to answer the question: "What is in
> the page cache?". There are various heuristics and counters but nothing
> that can tell you anything like:
> 
>   * 3M from /home/dxu/foo.txt
>   * 5K from ...
>   * etc.
> 
> The answer to the question is particularly useful in the stacked
> container world. Stacked containers implies multiple containers are run
> on the same physical host. Memory is precious resource on some (if not

Just to clarify: what are "stacked containers"? Do you mean nested
containers, i.e. containers running within containers?

Christian

  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-07 21:46 Daniel Xu
2021-04-07 21:46 ` [RFC bpf-next 1/1] bpf: Introduce iter_pagecache Daniel Xu
2021-04-08  6:14   ` Matthew Wilcox
2021-04-08 19:48     ` Daniel Xu
2021-04-08 21:29       ` Matthew Wilcox
2021-04-08  8:19   ` Christian Brauner
2021-04-08 20:44     ` Daniel Xu
2021-04-08 16:45   ` Al Viro
2021-04-08 20:49     ` Daniel Xu
2021-04-08 21:04       ` Al Viro
2021-04-08 22:11   ` Dave Chinner
2021-04-08  7:51 ` Christian Brauner [this message]
2021-04-08 16:08   ` [RFC bpf-next 0/1] bpf: Add page cache iterator Daniel Xu
2021-04-08 21:33 ` Shakeel Butt
2021-04-08 23:13 ` Darrick J. Wong
2021-04-09  0:24   ` Daniel Xu

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