https://sourceware.org/bugzilla/show_bug.cgi?id=34057
Bug ID: 34057
Summary: Add GNU_PROPERTY_1_NEEDED_TRANSPARENT_HUGEPAGE
Product: binutils
Version: 2.47 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Blocks: 34056
Target Milestone: ---
There are kernel ELF loader patch:
https://patchew.org/linux/[email protected]/
and glibc patches:
https://patchwork.sourceware.org/project/glibc/list/?series=59524
to load PT_LOAD segment with THP. But there is no per-application
control for kernel ELF loader. For glibc, we can use
$ GLIBC_TUNABLES=glibc.elf.thp=1 application
to enable THP on application. But it requires setting GLIBC_TUNABLES
at run-time.
Add GNU_PROPERTY_1_NEEDED_TRANSPARENT_HUGEPAGE:
/* Set if the object file should be loaded with transparent huge pages
if possible. */
#define GNU_PROPERTY_1_NEEDED_TRANSPARENT_HUGEPAGE (1U << 1)
to GNU_PROPERTY_1_NEEDED. Update kernel and glibc loaders to check for
GNU_PROPERTY_1_NEEDED_TRANSPARENT_HUGEPAGE. If it is set, load PT_LOAD
segments with THP if possible.
Referenced Bugs:
https://sourceware.org/bugzilla/show_bug.cgi?id=34056
[Bug 34056] Add GNU_PROPERTY_1_NEEDED_TRANSPARENT_HUGEPAGE
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