[v4 15/15] mm: debug for raw alloctor
From: Pavel Tatashin <hidden>
Date: 2017-08-02 20:41:01
Also in:
linux-arm-kernel, linux-mm, lkml, sparclinux
Subsystem:
memblock and memory management initialization, memory management, the rest · Maintainers:
Mike Rapoport, Andrew Morton, Linus Torvalds
When CONFIG_DEBUG_VM is enabled, this patch sets all the memory that is returned by memblock_virt_alloc_try_nid_raw() to ones to ensure that no places excpect zeroed memory. Signed-off-by: Pavel Tatashin <redacted> Reviewed-by: Steven Sistare <redacted> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Bob Picco <redacted> --- mm/memblock.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/mm/memblock.c b/mm/memblock.c
index bdf31f207fa4..b6f90e75946c 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c@@ -1363,12 +1363,19 @@ void * __init memblock_virt_alloc_try_nid_raw( phys_addr_t min_addr, phys_addr_t max_addr, int nid) { + void *ptr; + memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=0x%llx max_addr=0x%llx %pF\n", __func__, (u64)size, (u64)align, nid, (u64)min_addr, (u64)max_addr, (void *)_RET_IP_); - return memblock_virt_alloc_internal(size, align, - min_addr, max_addr, nid); + ptr = memblock_virt_alloc_internal(size, align, + min_addr, max_addr, nid); +#ifdef CONFIG_DEBUG_VM + if (ptr && size > 0) + memset(ptr, 0xff, size); +#endif + return ptr; } /**
--
2.13.3