[Bug malloc/28701] New: Remove upper limit on tunable MALLOC_MMAP_THRESHOLD

[Bug malloc/28701] New: Remove upper limit on tunable MALLOC_MMAP_THRESHOLD

[patrick.mcgehearty at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28701

            Bug ID: 28701
           Summary: Remove upper limit on tunable MALLOC_MMAP_THRESHOLD
           Product: glibc
           Version: 2.35
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: malloc
          Assignee: unassigned at sourceware dot org
          Reporter: patrick.mcgehearty at oracle dot com
  Target Milestone: ---

The current limit on MALLOC_MMAP_THRESHOLD is either 1 Mbyte (for 32-bit apps)
or 32 Mbytes (for 64-bit apps). These limits are low for modern large memory
systems. There are no documented limits on the allowed values for the tunable.
If a value larger then the current limit is used, the setting is silently
ignored.

It would be desirable to remove the limit test on setting
MALLOC_MMAP_THRESHOLD.

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[Bug malloc/28701] Remove upper limit on tunable MALLOC_MMAP_THRESHOLD

[patrick.mcgehearty at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28701

PMcGehearty <patrick.mcgehearty at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from PMcGehearty <patrick.mcgehearty at oracle dot com> ---
Patch was submitted to libc-alpha on Nov 1, 2021.

The patch was committed Dec 16, 2021.
Patch ID: 0a4df6f5342620e0ac065b50a1b978123cd5e2f1

Only change is to routine:
 do_set_mmap_threshold (size_t value)

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