linux-kernel - Re: [PATCH v11 02/14] HMM: add special swap filetype for memory migrated to device v2.

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Message-ID: <070501d10d42$2ec35190$8c49f4b0$@alibaba-inc.com>
Date:	Fri, 23 Oct 2015 11:23:26 +0800
From:	"Hillf Danton" <hillf.zj@...baba-inc.com>
To:	"'Jerome Glisse'" <jglisse@...hat.com>
Cc:	<linux-mm@...ck.org>,
	"'linux-kernel'" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 02/14] HMM: add special swap filetype for memory migrated to device v2.

> > > +	if (cnt_hmm_entry) {
> > > +		int ret;
> > > +
> > > +		ret = hmm_mm_fork(src_mm, dst_mm, dst_vma,
> > > +				  dst_pmd, start, end);
> >
> > Given start, s/end/addr/, no?
> 
> No, end is the right upper limit here.
> 
Then in the first loop, hmm_mm_fork is invoked for
the _entire_ range, from input addr to end.
In subsequent loops(if necessary), start is updated to
addr, and hmm_mm_fork is also invoked for remaining
range, from start to end.

Is the above overlap in range making sense?

Hillf

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