| Summary: | RFE: Swap size limitation should be designated in man page mkswap | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Michael Hood <mihood> |
| Component: | util-linux-ng | Assignee: | Karel Zak <kzak> |
| Status: | CLOSED WONTFIX | QA Contact: | qe-baseos-daemons |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.6 | CC: | dzhao, harald, hasuzuki, kazuhiro.sota, mihood, pschiffe, psklenar |
| Target Milestone: | rc | Keywords: | FutureFeature, ManPageChange |
| Target Release: | --- | Flags: | mihood:
needinfo-
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| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Enhancement | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-04-06 09:12:08 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
mkswap is owned by util-linux-ng. We follow this formula for swap space calculation during automatic partitioning: https://home.corp.redhat.com/wiki/swap-size-recommendations Not sure if you want to mention that in the mkswap man page. That's question if we want to maintain RHEL/fedora specific patches. The man page mkswap.8 describes kernel limitations and I don't see reason why all our tools are not able to follow kernel and why we have any extra limitation defined by installer. Anyway, I can add something like: The size of the swap partition can be limited by system installer, partitioning tool or another system component although kernel have no such limitation. See distribution specific documentation for more details. Comments? .. or 128GB is RHEL6 *kernel* limit? It is not reproduced on the lvm. Can only reproduce behavior on the physical partition. Maybe a specification of the anaconda. |
Description of problem: The mkswap man page lists the maximum values for certain architectures but does not list that in RHEL 6 there is a 128GB limit. Customer got the follwoing error while trying to build a nes server: ???????????? Error Partitioning ????????????? ? ? ? Could not allocate requested partitions: ? ? ? ? partition is too large for swap formatting ? ? (allowable size is 0 MB to 131072 MB). ? ? ? ? Press 'OK' to exit the installer. ? Version-Release number of selected component (if applicable): Rhel 6.6 How reproducible: NOTES The maximum useful size of a swap area depends on the architecture and the kernel version. It is roughly 2GiB on i386, PPC, m68k, ARM, 1GiB on sparc, 512MiB on mips, 128GiB on alpha and 3TiB on sparc64. For ker- nels after 2.3.3 there is no such limitation. Steps to Reproduce: 1. 2. 3. Actual results: man mkswap: NOTES The maximum useful size of a swap area depends on the architecture and the kernel version. It is roughly 2GiB on i386, PPC, m68k, ARM, 1GiB on sparc, 512MiB on mips, 128GiB on alpha and 3TiB on sparc64. For ker- nels after 2.3.3 there is no such limitation. Expected results: This should be a doc change in the man page. Additional info: