Hi,
> If you for the kmemleak scan (via echo) a few times, do you get more
> leaks?
Yes. I am getting some leaks after the scan.
> The udp_table_init() function looks like it could leak some
> memory but I haven't seen it before. I'm not sure whether this is a
> false positive or a real leak.
As Daniel suggested, this could be a real leak . However, we need to
confirm this.
udp_table_init() -> alloc_large_system_hash() -> alloc_pages_exact()
followed by kmemleak_alloc()
> I think the last line should be more like:
As per your suggestion, I have modified the patch.
Signed-off-by: Maxin B. John <maxin.john@xxxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
---
diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h
index 650ac9b..b4db69f 100644
--- a/arch/mips/include/asm/cache.h
+++ b/arch/mips/include/asm/cache.h
@@ -17,6 +17,6 @@
#define SMP_CACHE_SHIFT L1_CACHE_SHIFT
#define SMP_CACHE_BYTES L1_CACHE_BYTES
-#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+#define __read_mostly __attribute__((__section__(".data..read_mostly")))
#endif /* _ASM_CACHE_H */
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 832afbb..4f10141 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -68,12 +68,14 @@ SECTIONS
RODATA
/* writeable */
+ _sdata = .; /* Start of data section */
.data : { /* Data */
. = . + DATAOFFSET; /* for CONFIG_MAPPED_KERNEL */
INIT_TASK_DATA(PAGE_SIZE)
NOSAVE_DATA
CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
+ READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
DATA_DATA
CONSTRUCTORS
}
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index df9234c..5042421 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -398,7 +398,7 @@ config SLUB_STATS
config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
depends on DEBUG_KERNEL && EXPERIMENTAL && !MEMORY_HOTPLUG && \
- (X86 || ARM || PPC || S390 || SPARC64 || SUPERH ||
MICROBLAZE || TILE)
+ (X86 || ARM || PPC || MIPS || S390 || SPARC64 ||
SUPERH || MICROBLAZE || TILE)
select DEBUG_FS if SYSFS
select STACKTRACE if STACKTRACE_SUPPORT
