From: Gleb Natapov <gleb@redhat.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-api@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [PATCH v5] add MAP_UNLOCKED mmap flag
Date: Thu, 14 Jan 2010 08:50:08 +0200 [thread overview]
Message-ID: <20100114065008.GC18808@redhat.com> (raw)
In-Reply-To: <20100114092845.D719.A69D9226@jp.fujitsu.com>
On Thu, Jan 14, 2010 at 09:31:03AM +0900, KOSAKI Motohiro wrote:
> > If application does mlockall(MCL_FUTURE) it is no longer possible to mmap
> > file bigger than main memory or allocate big area of anonymous memory
> > in a thread safe manner. Sometimes it is desirable to lock everything
> > related to program execution into memory, but still be able to mmap
> > big file or allocate huge amount of memory and allow OS to swap them on
> > demand. MAP_UNLOCKED allows to do that.
> >
> > Signed-off-by: Gleb Natapov <gleb@redhat.com>
> > ---
> >
> > I get reports that people find this useful, so resending.
>
> This description is still wrong. It doesn't describe why this patch is useful.
>
I think the text above describes the feature it adds and its use
case quite well. Can you elaborate what is missing in your opinion,
or suggest alternative text please?
--
Gleb.
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WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-api@vger.kernel.org, akpm@linux-foundation.org
Subject: Re: [PATCH v5] add MAP_UNLOCKED mmap flag
Date: Thu, 14 Jan 2010 08:50:08 +0200 [thread overview]
Message-ID: <20100114065008.GC18808@redhat.com> (raw)
In-Reply-To: <20100114092845.D719.A69D9226@jp.fujitsu.com>
On Thu, Jan 14, 2010 at 09:31:03AM +0900, KOSAKI Motohiro wrote:
> > If application does mlockall(MCL_FUTURE) it is no longer possible to mmap
> > file bigger than main memory or allocate big area of anonymous memory
> > in a thread safe manner. Sometimes it is desirable to lock everything
> > related to program execution into memory, but still be able to mmap
> > big file or allocate huge amount of memory and allow OS to swap them on
> > demand. MAP_UNLOCKED allows to do that.
> >
> > Signed-off-by: Gleb Natapov <gleb@redhat.com>
> > ---
> >
> > I get reports that people find this useful, so resending.
>
> This description is still wrong. It doesn't describe why this patch is useful.
>
I think the text above describes the feature it adds and its use
case quite well. Can you elaborate what is missing in your opinion,
or suggest alternative text please?
--
Gleb.
next prev parent reply other threads:[~2010-01-14 6:50 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-13 9:31 [PATCH v5] add MAP_UNLOCKED mmap flag Gleb Natapov
2010-01-13 9:31 ` Gleb Natapov
[not found] ` <20100113093119.GT7549-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-01-13 14:36 ` Américo Wang
2010-01-13 14:36 ` Américo Wang
2010-01-13 14:36 ` Américo Wang
2010-01-13 17:31 ` Chris Wright
2010-01-13 17:31 ` Chris Wright
2010-01-14 0:31 ` KOSAKI Motohiro
2010-01-14 0:31 ` KOSAKI Motohiro
2010-01-14 6:50 ` Gleb Natapov [this message]
2010-01-14 6:50 ` Gleb Natapov
[not found] ` <20100114065008.GC18808-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-01-14 7:02 ` KOSAKI Motohiro
2010-01-14 7:02 ` KOSAKI Motohiro
2010-01-14 7:02 ` KOSAKI Motohiro
2010-01-14 7:22 ` Gleb Natapov
2010-01-14 7:22 ` Gleb Natapov
[not found] ` <20100114072210.GK18808-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-01-14 7:30 ` KOSAKI Motohiro
2010-01-14 7:30 ` KOSAKI Motohiro
2010-01-14 7:30 ` KOSAKI Motohiro
2010-01-14 8:01 ` Gleb Natapov
2010-01-14 8:01 ` Gleb Natapov
[not found] ` <20100114080117.GL18808-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2010-01-14 8:17 ` KOSAKI Motohiro
2010-01-14 8:17 ` KOSAKI Motohiro
2010-01-14 8:17 ` KOSAKI Motohiro
2010-01-14 10:22 ` Gleb Natapov
2010-01-14 10:22 ` Gleb Natapov
[not found] ` <20100114170247.6747.A69D9226-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2010-01-14 19:30 ` Andrew C. Morrow
2010-01-14 19:30 ` Andrew C. Morrow
2010-01-14 19:30 ` Andrew C. Morrow
2010-01-18 3:23 ` KOSAKI Motohiro
2010-01-18 3:23 ` KOSAKI Motohiro
2010-01-18 13:40 ` Gleb Natapov
2010-01-18 13:40 ` Gleb Natapov
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