linux-kernel - Re: [PATCH] block: strip out locking optimization in put_io

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Message-ID: <CANejiEVuQRUY4Ovb2a1JNDZjRTeN_nft8LwY8AB144=9dkFq7A@mail.gmail.com>
Date:	Thu, 9 Feb 2012 14:22:32 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Vivek Goyal <vgoyal@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Knut Petersen <Knut_Petersen@...nline.de>, mroos@...ux.ee
Subject: Re: [PATCH] block: strip out locking optimization in put_io_context()

2012/2/9 Tejun Heo <tj@...nel.org>:
> Hello, Shaohua.
>
> On Wed, Feb 08, 2012 at 04:29:53PM +0800, Shaohua Li wrote:
>> > the test adds mem=4G in a 2 sockets 16 CPU machine.
>> > just make several copy of kernel source in tmpfs (so there is swap
>> > depending on your
>> > memory size) and run kernel build in the kernel source in the meaning time.
>> > there is only one swap device which is a rotating disk.
>> >
>> > I'll test both patches soon.
>>
>> Tried all the options, the regression still exists. Any new idea?
>> I'll spend some time on it if I can get anything
>
> Can you please try the following one?  Thanks a lot!
doesn't work.
I also double confirmed b2efa05265d62 causes the regression
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