linux-kernel - Re: [PATCH] fs: System memory leak when running HTX with T10 DIF enabled

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Date:   Wed, 28 Jun 2017 12:44:00 -0600
From:   Jens Axboe <axboe@...com>
To:     Christoph Hellwig <hch@....de>
CC:     Keith Busch <keith.busch@...el.com>, <wenxiong@...ux.vnet.ibm.com>,
        <linux-kernel@...r.kernel.org>, <bjking@...ux.vnet.ibm.com>
Subject: Re: [PATCH] fs: System memory leak when running HTX with T10 DIF
 enabled

On 06/28/2017 12:38 PM, Christoph Hellwig wrote:
> On Wed, Jun 28, 2017 at 12:34:15PM -0600, Jens Axboe wrote:
>> That's what I sent out.
> 
> Where?  Didn't see that anywhere..

Looks like you weren't CC'ed on the original thread. About an hour ago.

>> Here it is again. We should get this into 4.12,
>> so would be great with a review or two.
> 
> Can we rename __bio_free to bio_uninit and add a comment to bio_init
> that it must be paried with bio_uninit?

Let's keep it small for 4.12. We can do a cleanup on top of this for
4.13.

> Except for that this looks fine, although there are a lot more callers
> that should get this treatment..

Should only be an issue for on-stack bio's, since we don't go through
the put/free path. Did a quick grep, looks like this is one of 3. One
is floppy, which probably neither has DIF or uses blk-throttle. Then
there's one in dm-bufio, didn't look too closely at that. Last one is
this one.

-- 
Jens Axboe