From: Mel Gorman <mgorman@techsingularity.net>
To: Pengfei Li <lpf.vector@gmail.com>
Cc: akpm@linux-foundation.org, mhocko@suse.com, vbabka@suse.cz,
cai@lca.pw, aryabinin@virtuozzo.com, osalvador@suse.de,
rostedt@goodmis.org, mingo@redhat.com,
pavel.tatashin@microsoft.com, rppt@linux.ibm.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 00/10] make "order" unsigned int
Date: Fri, 26 Jul 2019 08:26:37 +0100 [thread overview]
Message-ID: <20190726072637.GC2739@techsingularity.net> (raw)
In-Reply-To: <20190725184253.21160-1-lpf.vector@gmail.com>
On Fri, Jul 26, 2019 at 02:42:43AM +0800, Pengfei Li wrote:
> Objective
> ----
> The motivation for this series of patches is use unsigned int for
> "order" in compaction.c, just like in other memory subsystems.
>
Why? The series is relatively subtle in parts, particularly patch 5.
There have been places where by it was important for order to be able to
go negative due to loop exit conditions. If there was a gain from this
or it was a cleanup in the context of another major body of work, I
could understand the justification but that does not appear to be the
case here.
--
Mel Gorman
SUSE Labs
next prev parent reply other threads:[~2019-07-26 7:26 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-25 18:42 [PATCH 00/10] make "order" unsigned int Pengfei Li
2019-07-25 18:42 ` [PATCH 01/10] mm/page_alloc: use unsigned int for "order" in should_compact_retry() Pengfei Li
2019-07-25 18:58 ` Matthew Wilcox
2019-07-25 23:21 ` Pengfei Li
2019-07-25 18:42 ` [PATCH 02/10] mm/page_alloc: use unsigned int for "order" in __rmqueue_fallback() Pengfei Li
2019-07-26 9:36 ` Rasmus Villemoes
2019-07-27 2:34 ` Pengfei Li
2019-07-25 18:42 ` [PATCH 03/10] mm/page_alloc: use unsigned int for "order" in should_compact_retry() Pengfei Li
2019-07-25 18:42 ` [PATCH 04/10] mm/page_alloc: remove never used "order" in alloc_contig_range() Pengfei Li
2019-07-25 18:42 ` [PATCH 05/10] mm/compaction: make "order" and "search_order" unsigned int in struct compact_control Pengfei Li
2019-07-25 18:42 ` [PATCH 06/10] mm/compaction: make "order" unsigned int in compaction.c Pengfei Li
2019-07-25 18:42 ` [PATCH 07/10] trace/events/compaction: make "order" unsigned int Pengfei Li
2019-07-25 18:42 ` [PATCH 08/10] mm/compaction: use unsigned int for "compact_order_failed" in struct zone Pengfei Li
2019-07-25 18:42 ` [PATCH 09/10] mm/compaction: use unsigned int for "kcompactd_max_order" in struct pglist_data Pengfei Li
2019-07-25 18:42 ` [PATCH 10/10] mm/vmscan: use unsigned int for "kswapd_order" " Pengfei Li
2019-07-25 18:52 ` [PATCH 00/10] make "order" unsigned int Qian Cai
2019-07-25 23:48 ` Pengfei Li
2019-07-26 7:12 ` Michal Hocko
2019-07-27 17:25 ` Pengfei Li
2019-07-26 7:26 ` Mel Gorman [this message]
2019-07-27 16:44 ` Pengfei Li
2019-07-29 8:34 ` Mel Gorman
2019-07-30 5:53 ` Pengfei Li
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