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Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys_msync()

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From: Linus Torvalds <torvalds@...>
To: Hugh Dickins <hugh@...>
Cc: Miklos Szeredi <miklos@...>, <a.p.zijlstra@...>, <salikhmetov@...>, <linux-mm@...>, <jakob@...>, <linux-kernel@...>, <valdis.kletnieks@...>, <riel@...>, <ksm@...>, <staubach@...>, <jesper.juhl@...>, <akpm@...>, <protasnb@...>, <r.e.wolff@...>, <hidave.darkstar@...>, <hch@...>
Subject: Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys_msync()
Date: Wednesday, January 23, 2008 - 6:41 pm

On Wed, 23 Jan 2008, Hugh Dickins wrote:

I hear you. 

But I'm not seeing many alternatives, unless we start taking write faults 
on them unnecessarily. Do we care? Probably not really. 

So we certainly *could* make ramfs/tmpfs claim they do dirty accounting, 
but just having a no-op writeback. Without that, they'd need something 
really special in the file time updates.

Personally, I don't really see anybody really caring one way or the other, 
but who knows..

		Linus
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Messages in current thread:
[PATCH -v8 0/4] Fixing the issue with memory-mapped file times, Anton Salikhmetov, (Tue Jan 22, 7:21 pm)
[PATCH -v8 4/4] The design document for memory-mapped file t..., Anton Salikhmetov, (Tue Jan 22, 7:21 pm)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Randy Dunlap, (Fri Jan 25, 12:27 pm)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Anton Salikhmetov, (Fri Jan 25, 12:40 pm)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Miklos Szeredi, (Wed Jan 23, 5:26 am)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Anton Salikhmetov, (Wed Jan 23, 6:37 am)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Miklos Szeredi, (Wed Jan 23, 6:53 am)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Miklos Szeredi, (Wed Jan 23, 7:16 am)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Anton Salikhmetov, (Wed Jan 23, 8:25 am)
Re: [PATCH -v8 4/4] The design document for memory-mapped fi..., Miklos Szeredi, (Wed Jan 23, 9:55 am)
[PATCH -v8 1/4] Massive code cleanup of sys_msync(), Anton Salikhmetov, (Tue Jan 22, 7:21 pm)
[PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys_msy..., Anton Salikhmetov, (Tue Jan 22, 7:21 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 1:05 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Nick Piggin, (Wed Jan 23, 9:36 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Matt Mackall, (Thu Jan 24, 2:56 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Peter Zijlstra, (Wed Jan 23, 1:41 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 3:35 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 3:55 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 5:00 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 5:16 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 5:36 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 8:05 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 8:11 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Hugh Dickins, (Wed Jan 23, 6:29 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Linus Torvalds, (Wed Jan 23, 6:41 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Hugh Dickins, (Wed Jan 23, 8:03 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Anton Salikhmetov, (Wed Jan 23, 1:26 pm)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 5:41 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Peter Zijlstra, (Wed Jan 23, 4:47 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Anton Salikhmetov, (Wed Jan 23, 8:53 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Peter Zijlstra, (Wed Jan 23, 4:51 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 5:34 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Miklos Szeredi, (Wed Jan 23, 5:51 am)
Re: [PATCH -v8 3/4] Enable the MS_ASYNC functionality in sys..., Anton Salikhmetov, (Wed Jan 23, 9:09 am)
[PATCH -v8 2/4] Update ctime and mtime for memory-mapped files, Anton Salikhmetov, (Tue Jan 22, 7:21 pm)
Re: [PATCH -v8 2/4] Update ctime and mtime for memory-mapped..., Linus Torvalds, (Wed Jan 23, 2:03 pm)
Re: [PATCH -v8 2/4] Update ctime and mtime for memory-mapped..., Anton Salikhmetov, (Wed Jan 23, 7:14 pm)