From: Vlastimil Babka <vbabka@suse.cz>
To: Pavel Machek <pavel@ucw.cz>,
kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Cc: mhocko@suse.cz, "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: 5.7-rc0: kswapd eats cpu during a disk test?!
Date: Mon, 1 Jun 2020 10:55:24 +0200 [thread overview]
Message-ID: <e3afe444-4541-b420-0888-575cae8aa46d@suse.cz> (raw)
In-Reply-To: <20200531103431.GA28429@amd>
+CC linux-mm
On 5/31/20 12:34 PM, Pavel Machek wrote:
> Hi!
>
> This is simple cat /dev/sda > /dev/zero... on thinkpad x60 (x86-32),
> with spinning rust.
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 1000 root 20 0 0 0 0 R 53.3 0.0 57:34.93 kswapd0
> 27897 root 20 0 6976 580 536 R 44.5 0.0 1:44.53 cat
>
> It keeps both CPUs busy... and I don't think that's right.
Does an older kernel behave differently here?
next parent reply other threads:[~2020-06-01 8:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200531103431.GA28429@amd>
2020-06-01 8:55 ` Vlastimil Babka [this message]
2020-06-12 22:45 ` Pavel Machek
2020-06-12 23:05 ` Pavel Machek
2020-06-13 4:47 ` Hillf Danton
2020-06-13 6:48 ` Pavel Machek
2020-06-13 9:43 ` Hillf Danton
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