linux-kernel - Re: [PATCH 2/2] mm: Document handle_mm

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Message-ID: <1309281729.26417.14.camel@gandalf.stny.rr.com>
Date:	Tue, 28 Jun 2011 13:22:09 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Gleb Natapov <gleb@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Michel Lespinasse <walken@...gle.com>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [PATCH 2/2] mm: Document handle_mm_fault()

On Tue, 2011-06-28 at 10:02 -0700, Linus Torvalds wrote:
> On Tue, Jun 28, 2011 at 9:47 AM, Steven Rostedt <rostedt@...dmis.org> wrote:
> > + * Note: if @flags has FAULT_FLAG_ALLOW_RETRY set then the mmap_sem
> > + *       may be released if it failed to arquire the page_lock. If the
> > + *       mmap_sem is released then it will return VM_FAULT_RETRY set.
> > + *       This is to keep the time mmap_sem is held when the page_lock
> > + *       is taken for IO.
> 
> So I know what that flag does, but I knew it without the comment.
> 
> WITH the comment, I'm just confused. "This is to keep the time
> mmap_sem is held when the page_lock is taken for IO."
> 
> Sounds like a google translation from swahili. "keep the time" what?

"When people ask me what language is my mother tongue, I simply reply C"

Google translate from C -> english is worse than swahily -> english :p

> 
> Maybe "keep" -> "minimize"? Or just "This is to avoid holding mmap_sem
> while waiting for IO"

OK, that sounds better. Thanks.

I'll go to cut a v2, but I'll wait a day or so for others to comment.

-- Steve


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