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Message-ID: <20120306133054.GA24695@gmail.com> Date: Tue, 6 Mar 2012 21:30:55 +0800 From: Zheng Liu <gnehzuil.liu@...il.com> To: Sunil Mushran <sunil.mushran@...cle.com> Cc: linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org Subject: Re: [RFC] fadvise: add more flags to provide a hint for block allocation On Mon, Mar 05, 2012 at 08:26:03PM -0800, Sunil Mushran wrote: > On 3/5/2012 6:35 PM, Zheng Liu wrote: > >No, _RANDOM means that file system doesn't need to try its best to find > >a proper position to allocate some blocks for this file. Furthermore, > >currently random IOs seem that they are not obviously slower than > >sequential IOs in Flash/SSD device. For example, when users know a file > >that is accessed infrequently, they can put this file in a corner, such > >as in some discontinuously blocks. Then sequential blocks are reserved > >for the file that needs to be accessed frequently and users can obtain > >the better performance. > > Then FADV_ALLOC_HOT_REGION and FADV_ALLOC_COLD_REGION are > probably better terms. Make sense to me. Thanks a lot. ;-) Regards, Zheng > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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