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Groups > linux.kernel > #1449499

Re: [PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list

From Christoph Lameter <cl@linux.com>
Newsgroups linux.kernel
Subject Re: [PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list
Date 2016-07-25 15:50 +0200
Message-ID <rYOqB-5bn-13@gated-at.bofh.it> (permalink)
References <rXPoK-2cw-9@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 22 Jul 2016, Waiman Long wrote:

>  - Add a new patch to make the percpu head structure cacheline aligned
>    to prevent cacheline contention from disrupting the performance
>    of nearby percpu variables.

It would be better not to use the percpu allocation etc for this.
Given the frequency of off node data access I would say that the data
structure does not qualify as per cpu data. You have per cpu data items
yes but this is not used as per cpu data.

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Thread

[PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list Waiman Long <Waiman.Long@hpe.com> - 2016-07-22 22:40 +0200
  [PATCH v4 4/5] vfs: Use dlock list for superblock's inode list Waiman Long <Waiman.Long@hpe.com> - 2016-07-22 22:40 +0200
  [PATCH v4 2/5] fsnotify: Simplify inode iteration on umount Waiman Long <Waiman.Long@hpe.com> - 2016-07-22 22:40 +0200
  [PATCH v4 1/5] lib/dlock-list: Distributed and lock-protected lists Waiman Long <Waiman.Long@hpe.com> - 2016-07-22 22:40 +0200
  [PATCH v4 3/5] vfs: Remove unnecessary list_for_each_entry_safe() variants Waiman Long <Waiman.Long@hpe.com> - 2016-07-22 22:40 +0200
  Re: [PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list Christoph Lameter <cl@linux.com> - 2016-07-25 15:50 +0200
    Re: [PATCH v4 0/5] vfs: Use dlock list for SB's s_inodes list Tejun Heo <tj@kernel.org> - 2016-07-25 19:50 +0200

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