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Date:   Wed, 4 Aug 2021 10:52:35 +0200
From:   Michal Hocko <mhocko@suse.com>
To:     Waiman Long <llong@redhat.com>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>, Roman Gushchin <guro@fb.com>,
        linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
        linux-mm@kvack.org, Shakeel Butt <shakeelb@google.com>,
        Muchun Song <songmuchun@bytedance.com>,
        Luis Goncalves <lgoncalv@redhat.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] mm/memcg: Disable task obj_stock for PREEMPT_RT
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References: <20210803175519.22298-1-longman@redhat.com>
 <87h7g62jxm.ffs@tglx>
 <8953e099-356e-ee09-a701-f4c7f4cda487@redhat.com>
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On Tue 03-08-21 21:40:35, Waiman Long wrote:
[...]
> The purpose of this series is to improve kmem_cache allocation and free
> performance for non-RT kernel. So not disabling/enabling interrupt help a
> bit in this regard.

Johannes has explained the irq disabling role in the stock draining just
yesterday. Have a look at http://lkml.kernel.org/r/YQlPiLY0ieRb704V@cmpxchg.org
-- 
Michal Hocko
SUSE Labs