View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000548 | channel: kernel/el7 | --kernel--request-for-enhancement-- | public | 2015-01-27 10:09 | 2022-10-07 16:45 |
| Reporter | jcpunk | Assigned To | toracat | ||
| Priority | normal | Severity | feature | Reproducibility | N/A |
| Status | resolved | Resolution | fixed | ||
| Summary | 0000548: OverlayFS from 3.18 kernel | ||||
| Description | An overlay filesystem combines two filesystems, an 'upper' filesystem and a 'lower' filesystem, into a single file system namespace, modifications will be done to the upper filesystem. It has many uses, but it is most often used for live CDs, where a read-only OS image is used as lower filesystem and a writeable RAM-backed filesystem is used as the upper one. Any modifications will be done in the upper filesystem, thus allowing users to run the OS image provided normally. Overlayfs differs from other "union filesystem" implementations in that after a file is opened all operations go directly to the underlying, lower or upper, filesystems. This simplifies the implementation and allows native performance in these cases. | ||||
| Additional Information | OverlayFS provides a performance boost for Docker and CVMFS if they are built to take advantage of it. The CVMFS and Docker folks have said the are interested in supporting OverlayFS for its performance gains. | ||||
| Tags | No tags attached. | ||||
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@jcpunk Could you add toracat <at> elrepo.org to the CC list of that BZ, please? |
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@jcpunk Also... could you specify the request -- are you looking to see kernel-ml enabled with OverlayFS OR asking for a kmod to be built? |
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For info, backporting this module from kernel-3.18.4 to el7 does not look possible. Some functions are missing and the ABIs of others have changed so it's not something I'm prepared to entertain, particularly for anything FS related. So kernel-ml will be the only option for those wanting this feature on el7. |
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The recently announced kernel-ml-3.18.4-1.el{6|7}.elrepo package sets have now been built with CONFIG_OVERLAY_FS=m |
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Thanks for looking at all of this! I've added toracat to the bz. Looks like the kernel-ml option will have to do the trick. Thanks everyone! |
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For people monitoring this report: Overlayfs has been provided as tech preview in RHEL 7.1. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2015-01-27 10:09 | jcpunk | New Issue | |
| 2015-01-27 10:09 | jcpunk | Status | new => assigned |
| 2015-01-27 10:09 | jcpunk | Assigned To | => toracat |
| 2015-01-27 10:09 | jcpunk | Reported upstream | => https://bugzilla.redhat.com/show_bug.cgi?id=1186423 |
| 2015-01-27 10:17 | toracat | Note Added: 0004164 | |
| 2015-01-27 10:57 | burakkucat | Project | channel: elrepo/el7 => channel: kernel/el7 |
| 2015-01-27 11:59 | toracat | Note Added: 0004165 | |
| 2015-01-28 03:25 | pperry | Note Added: 0004169 | |
| 2015-01-28 14:06 | burakkucat | Note Added: 0004170 | |
| 2015-01-28 14:07 | burakkucat | Status | assigned => feedback |
| 2015-02-05 09:26 | jcpunk | Note Added: 0004187 | |
| 2015-02-05 10:46 | burakkucat | Status | feedback => assigned |
| 2015-03-12 12:06 | burakkucat | Status | assigned => resolved |
| 2015-03-12 12:06 | burakkucat | Resolution | open => fixed |
| 2015-03-12 12:17 | toracat | Note Added: 0004266 | |
| 2022-10-07 16:45 | burakkucat | Category | --elrepo--request-for-enhancement-- => --kernel--request-for-enhancement-- |
