From: yoma sophian <sophian.yoma@gmail.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: linux-mm@kvack.org
Subject: Re: page order 0 allocation fail but free pages are enough
Date: Tue, 24 May 2016 23:06:52 +0800 [thread overview]
Message-ID: <CADUS3om92UNPrwji7A_M6W-YPM2zjO9j6uPJ=c3vtVwUzrg_WA@mail.gmail.com> (raw)
In-Reply-To: <20160524115049.GH8259@dhcp22.suse.cz>
hi Michal:
>> Normal free:56088kB min:2000kB low:2500kB high:3000kB
>> active_anon:148332kB inactive_anon:6040kB active_file:1356kB
>> inactive_file:5240kB unevictable:0kB isolated(anon):0kB
>> isolated(file):0kB present:329728kB managed:250408kB mlocked:0kB
>> dirty:120kB writeback:0kB mapped:8108kB shmem:6136kB
>> slab_reclaimable:5520kB slab_unreclaimable:26128kB kernel_stack:2720kB
>> pagetables:4424kB unstable:0kB bounce:0kB free_cma:55452kB
>
> free-free_cma = 636kB so you are way below the watermark and that is
After tracing the __alloc_pages_slowpath, in the 2nd time we call
get_page_from_freelist, we will purposely put alloc_flags &
~ALLOC_NO_WATERMARKS.
Doesn't that mean kernel will bypass __zone_watermark_ok?
Sincerely appreciate your kind help ^^
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next prev parent reply other threads:[~2016-05-24 15:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-23 6:47 yoma sophian
2016-05-23 14:47 ` Michal Hocko
2016-05-23 15:31 ` yoma sophian
2016-05-23 19:00 ` Michal Hocko
2016-05-24 11:40 ` yoma sophian
2016-05-24 11:50 ` Michal Hocko
2016-05-24 15:06 ` yoma sophian [this message]
2016-05-25 2:11 ` yoma sophian
2016-05-25 6:31 ` Michal Hocko
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