| To: | Dongsu Park <dongsu.park@xxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [PATCH] util-linux/fallocate: introduce an option -c to support FALLOC_FL_COLLAPSE_RANGE |
| From: | Dave Chinner <david@xxxxxxxxxxxxx> |
| Date: | Wed, 26 Feb 2014 06:31:01 +1100 |
| Cc: | Namjae Jeon <linkinjeon@xxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, tytso@xxxxxxx, Lukas Czerner <lczerner@xxxxxxxxxx>, Namjae Jeon <namjae.jeon@xxxxxxxxxxx>, Ashish Sangwan <a.sangwan@xxxxxxxxxxx> |
| Delivered-to: | xfs@xxxxxxxxxxx |
| In-reply-to: | <1393355305-12009-1-git-send-email-dongsu.park@xxxxxxxxxxxxxxxx> |
| References: | <alpine.LFD.2.00.1402181001530.2216@xxxxxxxxxxxxxxxxxxxxx> <1393355305-12009-1-git-send-email-dongsu.park@xxxxxxxxxxxxxxxx> |
| User-agent: | Mutt/1.5.21 (2010-09-15) |
On Tue, Feb 25, 2014 at 08:08:25PM +0100, Dongsu Park wrote: > Introduce a new option -c (or --collapse-range) to support a new flag > FALLOC_FL_COLLAPSE_RANGE for fallocate(2). It will nullify a particular > range [offset, offset+len] by shifting extents beyond the range to the > beginning of the hole. > > To test that, it's necessary to apply kernel patches in the patchset > "fs: Introduce new flag (FALLOC_FL_COLLAPSE_RANGE) for fallocate" [1], > as well as "[PATCH v6] ext4: Add support FALLOC_FL_COLLAPSE_RANGE for > fallocate". [2] > > As discussed in the thread "[PATCH RESEND 3/10] ext4: Add support > FALLOC_FL_COLLAPSE_RANGE for fallocate", [3] this patch to util-linux > will be useful for testing collapse-range inside xfstests. FYI, we've already got support in xfs_io for collapse-range tests inside xfstests. http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/cmds/xfsprogs.git;a=commit;h=ca692f162d36c871c9c1b6169136b2c70503f2d8 There are already several tests that use it. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx |
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