[Bugs] [Bug 1722802] New: Incorrect power of two calculation in mem_pool_get_fn

bugzilla at redhat.com bugzilla at redhat.com
Fri Jun 21 11:11:28 UTC 2019


            Bug ID: 1722802
           Summary: Incorrect power of two calculation in mem_pool_get_fn
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: core
          Assignee: bugs at gluster.org
          Reporter: nbalacha at redhat.com
                CC: atumball at redhat.com, bugs at gluster.org,
                    rhinduja at redhat.com, rhs-bugs at redhat.com,
                    sankarshan at redhat.com, storage-qa-internal at redhat.com
        Depends On: 1722801
  Target Milestone: ---
    Classification: Community

+++ This bug was initially created as a clone of Bug #1722801 +++

Description of problem:

The method used to calculate the power of two value for a type is off by 1
causing twice the required amount of memory to be allocated.
For example, cComparing the information for inode_t in statedumps from 3.4.4
and 3.5.0:



sizeof-type=255     <--- actual sizeof inode_t is 168                           
padded-sizeof=512   <--- padded size is twice the required amount               

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Create volume, fuse mount it and create some files and dirs on it
2. Take a statedump of the gluster mount process (kill -SIGUSR1 <pid>)
3. Compare the sizeof-type and padded-sizeof values in the state releases.

Actual results:
The padded-sizeof is twice the smallest power of two value for sizeof-type +
sizeof(obj header)

Expected results:

The padded-sizeof should be the smallest power of two value for sizeof-type +
sizeof(obj header)

Additional info:

--- Additional comment from RHEL Product and Program Management on 2019-06-21
11:10:14 UTC ---

This bug is automatically being proposed for the next minor release of Red Hat
Gluster Storage by setting the release flag 'rhgs‑3.5.0' to '?'. 

If this bug should be proposed for a different release, please manually change
the proposed release flag.

Referenced Bugs:

[Bug 1722801] Incorrect power of two calculation in mem_pool_get_fn
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