From: Mel Gorman <mgorman@techsingularity.net>
To: NeilBrown <neilb@suse.de>
Cc: Linux-MM <linux-mm@kvack.org>, Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
"Darrick J . Wong" <djwong@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Michal Hocko <mhocko@suse.com>,
Dave Chinner <david@fromorbit.com>,
Rik van Riel <riel@surriel.com>, Vlastimil Babka <vbabka@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>,
Jonathan Corbet <corbet@lwn.net>,
Linux-fsdevel <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/5] mm/vmscan: Throttle reclaim when no progress is being made
Date: Tue, 21 Sep 2021 12:16:30 +0100 [thread overview]
Message-ID: <20210921111630.GR3959@techsingularity.net> (raw)
In-Reply-To: <163218069080.3992.14261132300912173043@noble.neil.brown.name>
On Tue, Sep 21, 2021 at 09:31:30AM +1000, NeilBrown wrote:
> On Mon, 20 Sep 2021, Mel Gorman wrote:
> > +
> > + reclaim_throttle(pgdat, VMSCAN_THROTTLE_NOPROGRESS, HZ/10);
>
> We always seem to pass "HZ/10" to reclaim_throttle(). Should we just
> hard-code that in the one place inside reclaim_throttle() itself?
>
do_writepages passes in HZ/50. I'm not sure if these values even have
any special meaning, I think it's more likely they were pulled out of
the air based on the speed of some disk in the past and then copied.
It's another reason why I want the wakeups to be based on events within
the mm as much as possible.
--
Mel Gorman
SUSE Labs
next prev parent reply other threads:[~2021-09-21 11:16 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 8:54 [RFC PATCH 0/5] Remove dependency on congestion_wait in mm/ Mel Gorman
2021-09-20 8:54 ` [PATCH 1/5] mm/vmscan: Throttle reclaim until some writeback completes if congested Mel Gorman
2021-09-20 23:19 ` NeilBrown
2021-09-21 11:12 ` Mel Gorman
2021-09-21 21:27 ` NeilBrown
2021-09-21 0:13 ` NeilBrown
2021-09-21 10:58 ` Mel Gorman
2021-09-21 21:40 ` NeilBrown
2021-09-22 6:04 ` Dave Chinner
2021-09-22 8:03 ` Mel Gorman
2021-09-20 8:54 ` [PATCH 2/5] mm/vmscan: Throttle reclaim and compaction when too may pages are isolated Mel Gorman
2021-09-20 23:27 ` NeilBrown
2021-09-21 11:03 ` Mel Gorman
2021-09-21 18:45 ` Yang Shi
2021-09-22 8:11 ` Mel Gorman
2021-09-20 8:54 ` [PATCH 3/5] mm/vmscan: Throttle reclaim when no progress is being made Mel Gorman
2021-09-20 23:31 ` NeilBrown
2021-09-21 11:16 ` Mel Gorman [this message]
2021-09-21 21:46 ` NeilBrown
2021-09-22 9:21 ` Mel Gorman
2021-09-20 8:54 ` [PATCH 4/5] mm/writeback: Throttle based on page writeback instead of congestion Mel Gorman
2021-09-20 8:54 ` [PATCH 5/5] mm/page_alloc: Remove the throttling logic from the page allocator Mel Gorman
2021-09-20 11:42 ` [RFC PATCH 0/5] Remove dependency on congestion_wait in mm/ Matthew Wilcox
2021-09-20 12:50 ` Mel Gorman
2021-09-20 14:11 ` David Sterba
2021-09-21 11:18 ` Mel Gorman
2021-09-20 19:51 ` Mel Gorman
2021-09-21 20:46 ` Dave Chinner
2021-09-22 17:52 ` Mel Gorman
-- strict thread matches above, loose matches on Subject: below --
2021-09-29 10:09 [PATCH 0/5] Remove dependency on congestion_wait in mm/ v2 Mel Gorman
2021-09-29 10:09 ` [PATCH 3/5] mm/vmscan: Throttle reclaim when no progress is being made Mel Gorman
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