From: osalvador@suse.de
To: Michal Hocko <mhocko@kernel.org>
Cc: akpm@linux-foundation.org, dan.j.williams@intel.com,
pavel.tatashin@microsoft.com, jglisse@redhat.com,
Jonathan.Cameron@huawei.com, rafael@kernel.org, david@redhat.com,
linux-mm@kvack.org, owner-linux-mm@kvack.org
Subject: Re: [PATCH v2 5/5] mm, memory_hotplug: Refactor shrink_zone/pgdat_span
Date: Wed, 28 Nov 2018 17:02:42 +0100 [thread overview]
Message-ID: <ccb78b1cf7879017f52f1803956f5e91@suse.de> (raw)
In-Reply-To: <20181128155030.GM6923@dhcp22.suse.cz>
>> Maybe that is fine, I am not sure.
>> Sorry for looping here, but it is being difficult for me to grasp it.
>
> OK, so let me try again. What is the difference for a pfn walker to
> start at an offline pfn start from any other offlined section withing a
> zone boundary? I believe there is none because the pfn walker needs to
> skip over offline pfns anyway whether they start at a zone boundary or
> not.
If the pfn walker in question skips over "invalid" (not online) pfn,
then we
are fine I guess.
But we need to make sure that this is the case, and that we do not have
someone
relaying on zone_start_pfn and trusting it blindly.
I will go through the code and check all cases to be sure that this is
not the case.
If that is the case, then I am fine with getting rid of the shrink code.
Thanks for explanations ;-)
next prev parent reply other threads:[~2018-11-28 16:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 16:20 [PATCH v2 0/5] Do not touch pages in hot-remove path Oscar Salvador
2018-11-27 16:20 ` [PATCH v2 1/5] mm, memory_hotplug: Add nid parameter to arch_remove_memory Oscar Salvador
2018-11-27 16:20 ` [PATCH v2 2/5] kernel, resource: Check for IORESOURCE_SYSRAM in release_mem_region_adjustable Oscar Salvador
2018-11-27 16:20 ` [PATCH v2 3/5] mm, memory_hotplug: Move zone/pages handling to offline stage Oscar Salvador
2018-11-28 7:52 ` Mike Rapoport
2018-11-28 14:25 ` osalvador
2018-11-28 14:15 ` osalvador
2018-11-27 16:20 ` [PATCH v2 4/5] mm, memory-hotplug: Rework unregister_mem_sect_under_nodes Oscar Salvador
2019-03-24 6:48 ` Anshuman Khandual
2019-03-25 7:40 ` Oscar Salvador
2019-03-25 8:04 ` Michal Hocko
2019-03-25 8:14 ` Oscar Salvador
2018-11-27 16:20 ` [PATCH v2 5/5] mm, memory_hotplug: Refactor shrink_zone/pgdat_span Oscar Salvador
2018-11-28 6:50 ` Michal Hocko
2018-11-28 7:07 ` Oscar Salvador
2018-11-28 10:03 ` David Hildenbrand
2018-11-28 10:14 ` Michal Hocko
2018-11-28 11:00 ` osalvador
2018-11-28 12:31 ` Michal Hocko
2018-11-28 12:51 ` osalvador
2018-11-28 13:08 ` Michal Hocko
2018-11-28 13:18 ` osalvador
2018-11-28 15:50 ` Michal Hocko
2018-11-28 16:02 ` osalvador [this message]
2018-11-29 9:29 ` osalvador
2018-11-28 13:09 ` osalvador
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