From: Greg KH <greg@kroah.com>
To: pjy@amazon.com
Cc: stable@vger.kernel.org, lmark@codeaurora.org
Subject: Re: Backport commit 786dee864804 ("mm/memory_hotplug: rate limit page migration warnings")
Date: Fri, 20 Oct 2023 16:26:09 +0200 [thread overview]
Message-ID: <2023102001-vision-preorder-3853@gregkh> (raw)
In-Reply-To: <mb61p4jiltmty.fsf@amazon.com>
On Fri, Oct 20, 2023 at 02:01:13PM +0000, pjy@amazon.com wrote:
>
> Please backport commit 786dee864804 ("mm/memory_hotplug: ratelimit page
> migration warnings") to 5.10 stable branch.
>
> Commit message:
> """
> When offlining memory the system can attempt to migrate a lot of pages, if
> there are problems with migration this can flood the logs. Printing all
> the data hogs the CPU and cause some RT threads to run for a long time,
> which may have some bad consequences.
>
> Rate limit the page migration warnings in order to avoid this.
> """
>
> We are sometimes seeing RCU stalls while offlining memory with the 5.10
> kernel due to the printing of these messages.
>
> Applying this patch solves the problem by ratelimiting the prints.
Now queued up, thanks.
greg k-h
prev parent reply other threads:[~2023-10-20 14:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-20 14:01 Backport commit 786dee864804 ("mm/memory_hotplug: rate limit page migration warnings") pjy
2023-10-20 14:26 ` Greg KH [this message]
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