linux-kernel - Re: [RFC PATCH v1 00/13] lru

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Message-Id: <20180208153652.481a77e57cc32c9e1a7e4269@linux-foundation.org>
Date:   Thu, 8 Feb 2018 15:36:52 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     daniel.m.jordan@...cle.com
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        aaron.lu@...el.com, ak@...ux.intel.com, Dave.Dice@...cle.com,
        dave@...olabs.net, khandual@...ux.vnet.ibm.com,
        ldufour@...ux.vnet.ibm.com, mgorman@...e.de, mhocko@...nel.org,
        pasha.tatashin@...cle.com, steven.sistare@...cle.com,
        yossi.lev@...cle.com
Subject: Re: [RFC PATCH v1 00/13] lru_lock scalability

On Wed, 31 Jan 2018 18:04:00 -0500 daniel.m.jordan@...cle.com wrote:

> lru_lock, a per-node* spinlock that protects an LRU list, is one of the
> hottest locks in the kernel.  On some workloads on large machines, it
> shows up at the top of lock_stat.

Do you have details on which callsites are causing the problem?  That
would permit us to consider other approaches, perhaps.