From: Vlastimil Babka <vbabka@suse.cz>
To: Qian Cai <cai@lca.pw>, "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kasan-dev@googlegroups.com,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <willy@infradead.org>,
Mel Gorman <mgorman@techsingularity.net>,
Michal Hocko <mhocko@kernel.org>,
Dmitry Vyukov <dvyukov@google.com>,
Walter Wu <walter-zh.wu@mediatek.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>
Subject: Re: [PATCH v2 2/3] mm, page_owner: decouple freeing stack trace from debug_pagealloc
Date: Tue, 1 Oct 2019 14:35:15 +0200 [thread overview]
Message-ID: <cb02d61c-eeb1-9875-185d-d3dd0e0b2424@suse.cz> (raw)
In-Reply-To: <626cd04e-513c-a50b-6787-d79690964088@suse.cz>
On 10/1/19 2:32 PM, Vlastimil Babka wrote:
> On 10/1/19 2:26 PM, Qian Cai wrote:
>> On Tue, 2019-10-01 at 14:51 +0300, Kirill A. Shutemov wrote:
>>> On Tue, Oct 01, 2019 at 10:07:44AM +0200, Vlastimil Babka wrote:
>>>> On 10/1/19 1:49 AM, Qian Cai wrote:
>>>
>>> DEBUG_PAGEALLOC is much more intrusive debug option. Not all architectures
>>> support it in an efficient way. Some require hibernation.
>>>
>>> I don't see a reason to tie these two option together.
>>
>> Make sense. How about page_owner=on will have page_owner_free=on by default?
>> That way we don't need the extra parameter.
>
> There were others that didn't want that overhead (memory+cpu) always. So the
> last version is as flexible as we can get, IMHO, before approaching bikeshed
> territory. It's just another parameter.
Or suggest how to replace page_owner=on with something else (page_owner=full?)
and I can change that. But I don't want to implement a variant where we store only
the freeing stack, though.
next prev parent reply other threads:[~2019-10-01 12:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-30 12:29 [PATCH v2 0/3] followups to debug_pagealloc improvements through page_owner Vlastimil Babka
2019-09-30 12:29 ` [PATCH v2 1/3] mm, page_owner: fix off-by-one error in __set_page_owner_handle() Vlastimil Babka
2019-09-30 12:29 ` [PATCH v2 2/3] mm, page_owner: decouple freeing stack trace from debug_pagealloc Vlastimil Babka
2019-09-30 12:49 ` Qian Cai
2019-09-30 21:39 ` Vlastimil Babka
2019-09-30 23:49 ` Qian Cai
2019-10-01 8:07 ` Vlastimil Babka
2019-10-01 11:51 ` Kirill A. Shutemov
2019-10-01 12:26 ` Qian Cai
2019-10-01 12:31 ` Kirill A. Shutemov
2019-10-01 12:32 ` Vlastimil Babka
2019-10-01 12:35 ` Vlastimil Babka [this message]
2019-10-01 13:18 ` Qian Cai
2019-10-01 14:15 ` Vlastimil Babka
2019-10-01 11:35 ` Kirill A. Shutemov
2019-09-30 12:29 ` [PATCH v2 3/3] mm, page_owner: rename flag indicating that page is allocated Vlastimil Babka
2019-09-30 12:49 ` Vlastimil Babka
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