This bug has been copied from bug #683155 and has been proposed
to be backported to 5.6 z-stream (EUS).
Created attachment 487110 [details]
The 5.6.z crosswrite patch
The 5.7 patch does not apply directly to the 5.6.z kernel.
This one is the proper patch for 5.6.z. I verified its
contents using kompare against the 5.7 patch.
Patch provided; setting devel_ack.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
GFS2 (Global File System 2) keeps track of the list of resource groups to allow better performance when allocating blocks. Previously, when the user created a large file in GFS2, GFS2 could have run out of allocation space because it was confined to the recently-used resource groups. With this update, GFS2 uses the MRU (Most Recently Used) list instead of the list of the recently-used resource groups. The MRU list allows GFS2 to use all available resource groups and if a large span of blocks is in use, GFS2 uses allocation blocks of another resource group.