linux-kernel - [PATCH 0/2] iommu/iova: Make the rcache depot properly flexible

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Message-Id: <cover.1692033783.git.robin.murphy@arm.com>
Date:   Mon, 14 Aug 2023 18:53:32 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     joro@...tes.org
Cc:     will@...nel.org, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org, john.g.garry@...cle.com,
        zhangzekun11@...wei.com
Subject: [PATCH 0/2] iommu/iova: Make the rcache depot properly flexible

Hi all,

Prompted by [1], which reminded me I started this a while ago, I've now
finished off my own attempt at sorting out the horrid lack of rcache
scalability. It's become quite clear that given the vast range of system
sizes and workloads there is no right size for a fixed depot array, so I
reckon we're better off not having one at all.

Note that the reclaim threshold and rate are chosen fairly arbitrarily -
it's enough of a challenge to get my 4-core dev board with spinning disk
and gigabit ethernet to push anything into a depot at all :)

Thanks,
Robin.

[1] https://lore.kernel.org/linux-iommu/20230811130246.42719-1-zhangzekun11@huawei.com


Robin Murphy (2):
  iommu/iova: Make the rcache depot scale better
  iommu/iova: Manage the depot list size

 drivers/iommu/iova.c | 94 ++++++++++++++++++++++++++++++--------------
 1 file changed, 65 insertions(+), 29 deletions(-)

-- 
2.39.2.101.g768bb238c484.dirty