From: "Doug Smythies" <dsmythies@telus.net>
To: 'Joonsoo Kim' <iamjoonsoo.kim@lge.com>
Cc: 'Johannes Weiner' <hannes@cmpxchg.org>,
'Andrew Morton' <akpm@linux-foundation.org>,
'Vladimir Davydov' <vdavydov.dev@gmail.com>,
bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org
Subject: RE: [Bug 172981] New: [bisected] SLAB: extreme load averages and over 2000 kworker threads
Date: Wed, 28 Sep 2016 08:22:24 -0700 [thread overview]
Message-ID: <000601d2199c$1f01cd10$5d056730$@net> (raw)
In-Reply-To: p862bY4Wd9akxp868bmekv
On 2016.09.27 23:20 Joonsoo Kim wrote:
> On Wed, Sep 28, 2016 at 02:18:42PM +0900, Joonsoo Kim wrote:
>> On Tue, Sep 27, 2016 at 08:13:58PM -0700, Doug Smythies wrote:
>>> By the way, I can eliminate the problem by doing this:
>>> (see also: https://bugzilla.kernel.org/show_bug.cgi?id=172991)
>>
>> I think that Johannes found the root cause of the problem and they
>> (Johannes and Vladimir) will solve the root cause.
>>
>> However, there is something useful to do in SLAB side.
>> Could you test following patch, please?
>>
>> Thanks.
>>
>> ---------->8--------------
>> diff --git a/mm/slab.c b/mm/slab.c
>> index 0eb6691..39e3bf2 100644
>> --- a/mm/slab.c
>> +++ b/mm/slab.c
>> @@ -965,7 +965,7 @@ static int setup_kmem_cache_node(struct kmem_cache *cachep,
>> * guaranteed to be valid until irq is re-enabled, because it will be
>> * freed after synchronize_sched().
>> */
>> - if (force_change)
>> + if (n->shared && force_change)
>> synchronize_sched();
>
> Oops...
>
> s/n->shared/old_shared/
Yes, that seems to work fine. After boot everything is good.
Then I tried and tried to get it to mess up, but could not.
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next prev parent reply other threads:[~2016-09-28 15:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-172981-27@https.bugzilla.kernel.org/>
2016-09-27 18:10 ` [Bug 172981] New: [bisected] SLAB: extreme load averages and over 2000 kworker threads Andrew Morton
2016-09-28 2:03 ` Johannes Weiner
2016-09-28 8:09 ` Vladimir Davydov
2016-09-29 2:00 ` Joonsoo Kim
2016-09-29 13:45 ` Vladimir Davydov
2016-09-30 8:19 ` Joonsoo Kim
2016-09-30 19:58 ` Vladimir Davydov
2016-10-06 5:04 ` Doug Smythies
2016-10-06 6:35 ` Joonsoo Kim
2016-10-06 16:02 ` Doug Smythies
2016-10-07 15:55 ` Doug Smythies
2016-09-28 3:13 ` Doug Smythies
2016-09-28 5:18 ` Joonsoo Kim
2016-09-28 6:20 ` Joonsoo Kim
2016-09-28 15:22 ` Doug Smythies [this message]
2016-09-29 1:50 ` Joonsoo Kim
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