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Date: Thu, 26 Aug 2010 10:13:43 +0800 From: Shaohua Li <shaohua.li@...el.com> To: "bchociej@...il.com" <bchociej@...il.com> Cc: "chris.mason@...cle.com" <chris.mason@...cle.com>, "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>, "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "cmm@...ibm.com" <cmm@...ibm.com>, "bcchocie@...ibm.com" <bcchocie@...ibm.com>, "mrlupfer@...ibm.com" <mrlupfer@...ibm.com>, "crscott@...ibm.com" <crscott@...ibm.com>, "mlupfer@...il.com" <mlupfer@...il.com>, "conscott@...edu" <conscott@...edu> Subject: Re: [RFC v2 PATCH 0/6] Btrfs: Add hot data relocation functionality On Fri, Aug 13, 2010 at 06:22:00AM +0800, bchociej@...il.com wrote: > > - Hooks in existing Btrfs functions to track data access frequency > (btrfs_direct_IO, btrfs_readpages, and extent_write_cache_pages) > > - New rbtrees for tracking access frequency of inodes and sub-file > ranges (hotdata_map.c) > > - A hash list for indexing data by its temperature (hotdata_hash.c) > > - A debugfs interface for dumping data from the rbtrees (debugfs.c) > > - A background kthread for relocating data to faster media based on > temperature Hi, I'm wondering if the temperature info can be exported to userspace, and let a daemon to do the relocation (by ioctl). A userspace daemon is more flexible. Thanks, Shaohua -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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