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From: Stefan Hajnoczi <stefanha@redhat.com>
To: Ilya Dryomov <idryomov@gmail.com>,
	Dongsheng Yang <dongsheng.yang@easystack.cn>
Cc: ceph-devel@vger.kernel.org, vromanso@redhat.com,
	kwolf@redhat.com, mimehta@redhat.com, acardace@redhat.com
Subject: rbd kernel block driver memory usage
Date: Wed, 25 Jan 2023 11:57:32 -0500	[thread overview]
Message-ID: <Y9FffDxl2sa9762M@fedora> (raw)

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Hi,
What sort of memory usage is expected under heavy I/O to an rbd block
device with O_DIRECT?

For example:
- Page cache: none (O_DIRECT)
- Socket snd/rcv buffers: yes
- Internal rbd buffers?

I am trying to understand how similar Linux rbd block devices behave
compared to local block device memory consumption (like NVMe PCI).

Thanks,
Stefan

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             reply	other threads:[~2023-01-25 16:58 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-25 16:57 Stefan Hajnoczi [this message]
2023-01-26 13:48 ` rbd kernel block driver memory usage Ilya Dryomov
2023-01-26 14:36   ` Stefan Hajnoczi
2023-01-26 15:49     ` Anthony D'Atri
2023-01-27  9:58       ` Ilya Dryomov
2023-01-26 18:14     ` Maged Mokhtar
2023-01-26 21:51       ` Stefan Hajnoczi
2023-01-27  9:40         ` Maged Mokhtar

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