From: Tejun Heo <tj@kernel.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Saravanan D <saravanand@outlook.com>,
x86@kernel.org, dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, linux-kernel@vger.kernel.org,
kernel-team@fb.com
Subject: Re: [PATCH] x86/mm: Tracking linear mapping split events since boot
Date: Mon, 25 Jan 2021 15:32:29 -0500 [thread overview]
Message-ID: <YA8q3eSTuIrUmPeM@slm.duckdns.org> (raw)
In-Reply-To: <30752f8e-16e9-d093-e6ec-31fd45715e9d@intel.com>
Hello,
On Mon, Jan 25, 2021 at 12:15:51PM -0800, Dave Hansen wrote:
> > DirectMap4k: 3505112 kB
> > DirectMap2M: 19464192 kB
> > DirectMap1G: 12582912 kB
> > DirectMap2MSplits: 1705
> > DirectMap1GSplits: 20
>
> This seems much more like something we'd want in /proc/vmstat or as a
> tracepoint than meminfo. A tracepoint would be especially nice because
> the trace buffer could actually be examined if an admin finds an
> excessive number of these.
Adding a TP sure can be helpful but I'm not sure how that'd make counters
unnecessary given that the accumulated number of events since boot is what
matters.
Thanks.
--
tejun
next prev parent reply other threads:[~2021-01-25 20:34 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <BYAPR01MB40856478D5BE74CB6A7D5578CFBD9@BYAPR01MB4085.prod.exchangelabs.com>
2021-01-25 20:15 ` [PATCH] x86/mm: Tracking linear mapping split events since boot Dave Hansen
2021-01-25 20:32 ` Tejun Heo [this message]
2021-01-26 0:47 ` Dave Hansen
2021-01-26 0:53 ` Tejun Heo
2021-01-26 1:04 ` Dave Hansen
2021-01-26 1:17 ` Tejun Heo
2021-01-27 17:51 ` [PATCH V2] x86/mm: Tracking linear mapping split events Saravanan D
2021-01-27 21:03 ` Tejun Heo
2021-01-27 21:32 ` Dave Hansen
2021-01-27 21:36 ` Tejun Heo
2021-01-27 21:42 ` Saravanan D
2021-01-27 22:50 ` [PATCH V3] " Saravanan D
2021-01-27 23:00 ` Randy Dunlap
2021-01-27 23:56 ` Saravanan D
2021-01-27 23:41 ` Dave Hansen
2021-01-28 0:15 ` Saravanan D
2021-01-28 4:35 ` [PATCH V4] " Saravanan D
2021-01-28 4:51 ` Matthew Wilcox
2021-01-28 10:49 ` [PATCH V5] " Saravanan D
2021-01-28 15:04 ` Matthew Wilcox
2021-01-28 19:49 ` Saravanan D
2021-01-28 16:33 ` Zi Yan
2021-01-28 16:41 ` Dave Hansen
2021-01-28 16:56 ` Zi Yan
2021-01-28 16:59 ` Song Liu
2021-01-28 19:17 ` Dave Hansen
2021-01-28 21:20 ` Saravanan D
2021-01-28 23:34 ` [PATCH V6] " Saravanan D
2021-01-28 23:41 ` Tejun Heo
2021-01-29 19:27 ` Johannes Weiner
2021-02-08 23:17 ` Saravanan D
2021-02-08 23:30 ` Dave Hansen
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