From: SeongJae Park <sjpark@amazon.com>
To: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: SeongJae Park <sjpark@amazon.com>, <akpm@linux-foundation.org>,
"SeongJae Park" <sjpark@amazon.de>, <aarcange@redhat.com>,
<yang.shi@linux.alibaba.com>, <acme@kernel.org>,
<alexander.shishkin@linux.intel.com>, <amit@kernel.org>,
<brendan.d.gregg@gmail.com>, <brendanhiggins@google.com>,
<cai@lca.pw>, <colin.king@canonical.com>, <corbet@lwn.net>,
<dwmw@amazon.com>, <jolsa@redhat.com>, <kirill@shutemov.name>,
<mark.rutland@arm.com>, <mgorman@suse.de>, <minchan@kernel.org>,
<mingo@redhat.com>, <namhyung@kernel.org>, <peterz@infradead.org>,
<rdunlap@infradead.org>, <rientjes@google.com>,
<rostedt@goodmis.org>, <shuah@kernel.org>, <sj38.park@gmail.com>,
<vbabka@suse.cz>, <vdavydov.dev@gmail.com>, <linux-mm@kvack.org>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: Re: [PATCH v6 04/14] mm/damon: Apply dynamic memory mapping changes
Date: Tue, 10 Mar 2020 12:53:55 +0100 [thread overview]
Message-ID: <20200310115355.23840-1-sjpark@amazon.com> (raw)
In-Reply-To: <20200310090026.00005ea9@Huawei.com> (raw)
On Tue, 10 Mar 2020 09:00:26 +0000 Jonathan Cameron <Jonathan.Cameron@Huawei.com> wrote:
> On Mon, 24 Feb 2020 13:30:37 +0100
> SeongJae Park <sjpark@amazon.com> wrote:
>
> > From: SeongJae Park <sjpark@amazon.de>
> >
> > Only a number of parts in the virtual address space of the processes is
> > mapped to physical memory and accessed. Thus, tracking the unmapped
> > address regions is just wasteful. However, tracking every memory
> > mapping change might incur an overhead. For the reason, DAMON applies
> > the dynamic memory mapping changes to the tracking regions only for each
> > of a user-specified time interval (``regions update interval``).
> >
> > Signed-off-by: SeongJae Park <sjpark@amazon.de>
> Trivial inline. Otherwise makes sense to me.
>
[...]
> > +static void damon_apply_three_regions(struct damon_ctx *ctx,
> > + struct damon_task *t, struct region bregions[3])
> > +{
> > + struct damon_region *r, *next;
> > + unsigned int i = 0;
> > +
> > + /* Remove regions which isn't in the three big regions now */
> > + damon_for_each_region_safe(r, next, t) {
> > + for (i = 0; i < 3; i++) {
> > + if (damon_intersect(r, &bregions[i]))
> > + break;
> > + }
> > + if (i == 3)
> > + damon_destroy_region(r);
> > + }
> > +
> > + /* Adjust intersecting regions to fit with the threee big regions */
>
> three
Good eye! Thanks for finding :)
[...]
next prev parent reply other threads:[~2020-03-10 11:54 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 12:30 [PATCH v6 00/14] Introduce Data Access MONitor (DAMON) SeongJae Park
2020-02-24 12:30 ` [PATCH v6 01/14] mm: " SeongJae Park
2020-03-10 8:54 ` Jonathan Cameron
2020-03-10 11:50 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 02/14] mm/damon: Implement region based sampling SeongJae Park
2020-03-10 8:57 ` Jonathan Cameron
2020-03-10 11:52 ` SeongJae Park
2020-03-10 15:55 ` Jonathan Cameron
2020-03-10 16:22 ` SeongJae Park
2020-03-10 17:39 ` Jonathan Cameron
2020-03-12 9:20 ` SeongJae Park
2020-03-13 17:29 ` Jonathan Cameron
2020-03-13 20:16 ` SeongJae Park
2020-03-17 11:32 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 03/14] mm/damon: Adaptively adjust regions SeongJae Park
2020-03-10 8:57 ` Jonathan Cameron
2020-03-10 11:53 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 04/14] mm/damon: Apply dynamic memory mapping changes SeongJae Park
2020-03-10 9:00 ` Jonathan Cameron
2020-03-10 11:53 ` SeongJae Park [this message]
2020-02-24 12:30 ` [PATCH v6 05/14] mm/damon: Implement callbacks SeongJae Park
2020-03-10 9:01 ` Jonathan Cameron
2020-03-10 11:55 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 06/14] mm/damon: Implement access pattern recording SeongJae Park
2020-03-10 9:01 ` Jonathan Cameron
2020-03-10 11:55 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 07/14] mm/damon: Implement kernel space API SeongJae Park
2020-03-10 9:01 ` Jonathan Cameron
2020-03-10 11:56 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 08/14] mm/damon: Add debugfs interface SeongJae Park
2020-03-10 9:02 ` Jonathan Cameron
2020-03-10 11:56 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 09/14] mm/damon: Add a tracepoint for result writing SeongJae Park
2020-03-10 9:03 ` Jonathan Cameron
2020-03-10 11:57 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 10/14] tools: Add a minimal user-space tool for DAMON SeongJae Park
2020-02-24 12:30 ` [PATCH v6 11/14] Documentation/admin-guide/mm: Add a document " SeongJae Park
2020-03-10 9:03 ` Jonathan Cameron
2020-03-10 11:57 ` SeongJae Park
2020-02-24 12:30 ` [PATCH v6 12/14] mm/damon: Add kunit tests SeongJae Park
2020-02-24 12:30 ` [PATCH v6 13/14] mm/damon: Add user selftests SeongJae Park
2020-02-24 12:30 ` [PATCH v6 14/14] MAINTAINERS: Update for DAMON SeongJae Park
2020-03-02 11:35 ` [PATCH v6 00/14] Introduce Data Access MONitor (DAMON) SeongJae Park
2020-03-09 10:23 ` SeongJae Park
2020-03-10 17:21 ` Shakeel Butt
2020-03-12 10:07 ` SeongJae Park
2020-03-12 10:43 ` SeongJae Park
2020-03-18 19:52 ` Shakeel Butt
2020-03-19 9:03 ` SeongJae Park
2020-03-23 17:29 ` Shakeel Butt
2020-03-24 8:34 ` SeongJae Park
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