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OpenCloudOS-Kernel
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devm: make allocations numa aware by default 

Given we already have a device just use dev_to_node() to provide hint
allocations for devres.  However, current devres_alloc() users will need
to explicitly opt-in with devres_alloc_node().

Reviewed-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2015-10-05 20:35:55 -04:00
parent b36f47617f
commit 7c683941f3
2 changed files with 22 additions and 13 deletions
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19
drivers/base/devres.c
View File

@ -82,12 +82,12 @@ static struct devres_group * node_to_group(struct devres_node *node)
}
static __always_inline struct devres * alloc_dr(dr_release_t release,
size_t size, gfp_t gfp)
size_t size, gfp_t gfp, int nid)
{
size_t tot_size = sizeof(struct devres) + size;
struct devres *dr;
dr = kmalloc_track_caller(tot_size, gfp);
dr = kmalloc_node_track_caller(tot_size, gfp, nid);
if (unlikely(!dr))
return NULL;
@ -106,24 +106,25 @@ static void add_dr(struct device *dev, struct devres_node *node)
}
#ifdef CONFIG_DEBUG_DEVRES
void * __devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
void * __devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid,
const char *name)
{
struct devres *dr;
dr = alloc_dr(release, size, gfp | __GFP_ZERO);
dr = alloc_dr(release, size, gfp | __GFP_ZERO, nid);
if (unlikely(!dr))
return NULL;
set_node_dbginfo(&dr->node, name, size);
return dr->data;
}
EXPORT_SYMBOL_GPL(__devres_alloc);
EXPORT_SYMBOL_GPL(__devres_alloc_node);
#else
/**
* devres_alloc - Allocate device resource data
* @release: Release function devres will be associated with
* @size: Allocation size
* @gfp: Allocation flags
* @nid: NUMA node
*
* Allocate devres of @size bytes. The allocated area is zeroed, then
* associated with @release. The returned pointer can be passed to
@ -132,16 +133,16 @@ EXPORT_SYMBOL_GPL(__devres_alloc);
* RETURNS:
* Pointer to allocated devres on success, NULL on failure.
*/
void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
void * devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp, int nid)
{
struct devres *dr;
dr = alloc_dr(release, size, gfp | __GFP_ZERO);
dr = alloc_dr(release, size, gfp | __GFP_ZERO, nid);
if (unlikely(!dr))
return NULL;
return dr->data;
}
EXPORT_SYMBOL_GPL(devres_alloc);
EXPORT_SYMBOL_GPL(devres_alloc_node);
#endif
/**
@ -776,7 +777,7 @@ void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
struct devres *dr;
/* use raw alloc_dr for kmalloc caller tracing */
dr = alloc_dr(devm_kmalloc_release, size, gfp);
dr = alloc_dr(devm_kmalloc_release, size, gfp, dev_to_node(dev));
if (unlikely(!dr))
return NULL;

16
include/linux/device.h
View File

@ -604,13 +604,21 @@ typedef void (*dr_release_t)(struct device *dev, void *res);
typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data);
#ifdef CONFIG_DEBUG_DEVRES
extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
const char *name);
extern void *__devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp,
int nid, const char *name);
#define devres_alloc(release, size, gfp) \
__devres_alloc(release, size, gfp, #release)
__devres_alloc_node(release, size, gfp, NUMA_NO_NODE, #release)
#define devres_alloc_node(release, size, gfp, nid) \
__devres_alloc_node(release, size, gfp, nid, #release)
#else
extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
extern void *devres_alloc_node(dr_release_t release, size_t size, gfp_t gfp,
int nid);
static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
{
return devres_alloc_node(release, size, gfp, NUMA_NO_NODE);
}
#endif
extern void devres_for_each_res(struct device *dev, dr_release_t release,
dr_match_t match, void *match_data,
void (*fn)(struct device *, void *, void *),