> On Sep 3, 2017, at 1:50 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > On Sat, Sep 02, 2017 at 03:41:45PM -0700, Richard Wareing wrote: >> - Gates real-time block device fallocation's to rtfallocmin bytes >> - Use case: Allows developers to send files to the SSD with ease simply >> by fallocating them, if they are below rtfallocmin XFS will allocate the >> blocks from the non-RT device (e.g. an SSD) >> - Useful to automagically store small files on the SSD vs. RT device >> (HDD) for tiered XFS setups without having to rely on XFS specific >> ioctl calls. Userland tools such as rsync can also use fallocation >> behavior to migrate files between SSD and RT (HDD) device without >> modifiction (e.g. w/ --preallocate flag). > > I'd be much happier if this was done inside the allocator, and in > affect for any initial allocation, not just fallocate, as that keeps > the layering and logic much cleaner. See my comments on your reply to my cover letter. Would love to hear your thoughts on my reply. > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
