34 lines
1.3 KiB
Diff
34 lines
1.3 KiB
Diff
|
|
From 9145e7cc47b0a43620273ec6f3d1bf016618eb62 Mon Sep 17 00:00:00 2001
|
|
From: chenziyang <chenziyang4@huawei.com>
|
|
Date: Sat, 4 Mar 2023 17:13:57 +0800
|
|
Subject: [PATCH 1/2] elf/ld.so: add MAP_NORESERVE flag for the first mmap 2MB contiguous va
|
|
|
|
If environment only has 50MB hugepage resources, RX PT_LOAD segment
|
|
requires 25MB and RW PT_LOAD segment requires 100MB memory. Before this
|
|
patch, we would exit mmap hugepage because we will try to mmap 125MB
|
|
hugepage. After this change, ld.so will allow RX PT_LOAD to map into 2MB
|
|
hugepage
|
|
|
|
Signed-off-by: Chen Ziyang<chenziyang4@huawei.com>
|
|
---
|
|
elf/dl-map-segments-hugepage.h | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/elf/dl-map-segments-hugepage.h b/elf/dl-map-segments-hugepage.h
|
|
index 5ea89a36..6ab5f939 100644
|
|
--- a/elf/dl-map-segments-hugepage.h
|
|
+++ b/elf/dl-map-segments-hugepage.h
|
|
@@ -59,7 +59,7 @@ __mmap_reserved_area(const struct loadcmd loadcmds[], size_t nloadcmds,
|
|
* This va space can not be munmap in case of multi thread dlopen concurrently
|
|
*/
|
|
void *map_area_start = __mmap(0, *maparealen, PROT_NONE,
|
|
- MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB|(SHFIT_2MB << MAP_HUGE_SHIFT), -1, 0);
|
|
+ MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB|MAP_NORESERVE|(SHFIT_2MB << MAP_HUGE_SHIFT), -1, 0);
|
|
if (__glibc_unlikely (map_area_start == MAP_FAILED))
|
|
return MAP_FAILED;
|
|
|
|
--
|
|
2.33.0
|
|
|