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[Qemu-devel] [PATCH] linux-user: mmap_reserve() not controlled by RESERV
From: |
amateur |
Subject: |
[Qemu-devel] [PATCH] linux-user: mmap_reserve() not controlled by RESERVED_VA |
Date: |
Tue, 14 Sep 2010 13:22:34 +0800 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
mmap_reserve() should be called only when RESERVED_VA is enabled.
Otherwise, unmaped virtual address space will never be reusable. This
bug will exhaust virtual address space in extreme conditions.
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index e10a6ef..50748a2 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -697,7 +697,9 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong
old_size,
old_size, new_size,
flags | MREMAP_FIXED,
g2h(mmap_start));
- mmap_reserve(old_addr, old_size);
+ if ( RESERVED_VA ) {
+ mmap_reserve(old_addr, old_size);
+ }
}
} else {
int prot = 0;
--
If you don't drink it, someone else will.
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