From: Andrew Morton <akpm@linux-foundation.org>
To: paulmck@kernel.org
Cc: Matthew Wilcox <willy@infradead.org>,
cl@linux.com, penberg@kernel.org, rientjes@google.com,
iamjoonsoo.kim@lge.com, hannes@cmpxchg.org, urezki@gmail.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Raw spinlocks and memory allocation
Date: Fri, 31 Jul 2020 14:29:19 -0700 [thread overview]
Message-ID: <20200731142919.36c4c741189426db0f8b8514@linux-foundation.org> (raw)
In-Reply-To: <20200731212457.GS9247@paulmck-ThinkPad-P72>
On Fri, 31 Jul 2020 14:24:57 -0700 "Paul E. McKenney" <paulmck@kernel.org> wrote:
> The reason for this restriction is that in -rt, the spin_lock(&zone->lock)
> in rmqueue_bulk() can sleep.
So if there is runtime overhead, this overhead could be restricted to
-rt kernels with suitable ifdefs?
next prev parent reply other threads:[~2020-07-31 21:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-30 23:12 Raw spinlocks and memory allocation Paul E. McKenney
2020-07-31 20:38 ` Andrew Morton
2020-07-31 20:48 ` Paul E. McKenney
2020-07-31 20:59 ` Matthew Wilcox
2020-07-31 21:24 ` Paul E. McKenney
2020-07-31 21:29 ` Andrew Morton [this message]
2020-07-31 22:30 ` Paul E. McKenney
2020-07-31 22:47 ` Matthew Wilcox
2020-08-01 0:02 ` Paul E. McKenney
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