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lightnvm: pblk: use kvmalloc for metadata

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There is no reason now not to use kvmalloc, so replace the internal
metadata allocation scheme.

Reviewed-by: Javier González <javier@javigon.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hans Holmberg <hans@owltronix.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hans Holmberg 2019-07-31 11:41:35 +02:00 committed by Jens Axboe
parent 48e5da7255
commit ff8f352070
4 changed files with 19 additions and 64 deletions
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3
drivers/lightnvm/pblk-core.c
View File

@ -1839,8 +1839,7 @@ static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)
struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
struct pblk_emeta *emeta = line->emeta;
w_err_gc->lba_list = pblk_malloc(lba_list_size,
l_mg->emeta_alloc_type, GFP_KERNEL);
w_err_gc->lba_list = kvmalloc(lba_list_size, GFP_KERNEL);
memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf),
lba_list_size);
}

19
drivers/lightnvm/pblk-gc.c
View File

@ -132,14 +132,12 @@ static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
struct pblk_line *line)
{
struct line_emeta *emeta_buf;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
unsigned int lba_list_size = lm->emeta_len[2];
__le64 *lba_list;
int ret;
emeta_buf = pblk_malloc(lm->emeta_len[0],
l_mg->emeta_alloc_type, GFP_KERNEL);
emeta_buf = kvmalloc(lm->emeta_len[0], GFP_KERNEL);
if (!emeta_buf)
return NULL;
@ -147,7 +145,7 @@ static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
if (ret) {
pblk_err(pblk, "line %d read emeta failed (%d)\n",
line->id, ret);
pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
kvfree(emeta_buf);
return NULL;
}
@ -161,16 +159,16 @@ static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
if (ret) {
pblk_err(pblk, "inconsistent emeta (line %d)\n",
line->id);
pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
kvfree(emeta_buf);
return NULL;
}
lba_list = pblk_malloc(lba_list_size,
l_mg->emeta_alloc_type, GFP_KERNEL);
lba_list = kvmalloc(lba_list_size, GFP_KERNEL);
if (lba_list)
memcpy(lba_list, emeta_to_lbas(pblk, emeta_buf), lba_list_size);
pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
kvfree(emeta_buf);
return lba_list;
}
@ -181,7 +179,6 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
ws);
struct pblk *pblk = line_ws->pblk;
struct pblk_line *line = line_ws->line;
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
@ -272,7 +269,7 @@ next_rq:
goto next_rq;
out:
pblk_mfree(lba_list, l_mg->emeta_alloc_type);
kvfree(lba_list);
kfree(line_ws);
kfree(invalid_bitmap);
@ -286,7 +283,7 @@ fail_free_gc_data:
fail_free_gc_rq:
kfree(gc_rq);
fail_free_lba_list:
pblk_mfree(lba_list, l_mg->emeta_alloc_type);
kvfree(lba_list);
fail_free_invalid_bitmap:
kfree(invalid_bitmap);
fail_free_ws:

38
drivers/lightnvm/pblk-init.c
View File

@ -543,7 +543,7 @@ static void pblk_line_mg_free(struct pblk *pblk)
for (i = 0; i < PBLK_DATA_LINES; i++) {
kfree(l_mg->sline_meta[i]);
pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type);
kvfree(l_mg->eline_meta[i]->buf);
kfree(l_mg->eline_meta[i]);
}
@ -560,7 +560,7 @@ static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg,
kfree(line->erase_bitmap);
kfree(line->chks);
pblk_mfree(w_err_gc->lba_list, l_mg->emeta_alloc_type);
kvfree(w_err_gc->lba_list);
kfree(w_err_gc);
}
@ -890,29 +890,14 @@ static int pblk_line_mg_init(struct pblk *pblk)
if (!emeta)
goto fail_free_emeta;
if (lm->emeta_len[0] > KMALLOC_MAX_CACHE_SIZE) {
l_mg->emeta_alloc_type = PBLK_VMALLOC_META;
emeta->buf = vmalloc(lm->emeta_len[0]);
if (!emeta->buf) {
kfree(emeta);
goto fail_free_emeta;
}
emeta->nr_entries = lm->emeta_sec[0];
l_mg->eline_meta[i] = emeta;
} else {
l_mg->emeta_alloc_type = PBLK_KMALLOC_META;
emeta->buf = kmalloc(lm->emeta_len[0], GFP_KERNEL);
if (!emeta->buf) {
kfree(emeta);
goto fail_free_emeta;
}
emeta->nr_entries = lm->emeta_sec[0];
l_mg->eline_meta[i] = emeta;
emeta->buf = kvmalloc(lm->emeta_len[0], GFP_KERNEL);
if (!emeta->buf) {
kfree(emeta);
goto fail_free_emeta;
}
emeta->nr_entries = lm->emeta_sec[0];
l_mg->eline_meta[i] = emeta;
}
for (i = 0; i < l_mg->nr_lines; i++)
@ -926,10 +911,7 @@ static int pblk_line_mg_init(struct pblk *pblk)
fail_free_emeta:
while (--i >= 0) {
if (l_mg->emeta_alloc_type == PBLK_VMALLOC_META)
vfree(l_mg->eline_meta[i]->buf);
else
kfree(l_mg->eline_meta[i]->buf);
kvfree(l_mg->eline_meta[i]->buf);
kfree(l_mg->eline_meta[i]);
}

23
drivers/lightnvm/pblk.h
View File

@ -481,11 +481,6 @@ struct pblk_line {
#define PBLK_DATA_LINES 4
enum {
PBLK_KMALLOC_META = 1,
PBLK_VMALLOC_META = 2,
};
enum {
PBLK_EMETA_TYPE_HEADER = 1, /* struct line_emeta first sector */
PBLK_EMETA_TYPE_LLBA = 2, /* lba list - type: __le64 */
@ -521,9 +516,6 @@ struct pblk_line_mgmt {
__le32 *vsc_list; /* Valid sector counts for all lines */
/* Metadata allocation type: VMALLOC | KMALLOC */
int emeta_alloc_type;
/* Pre-allocated metadata for data lines */
struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
@ -934,21 +926,6 @@ void pblk_rl_werr_line_out(struct pblk_rl *rl);
int pblk_sysfs_init(struct gendisk *tdisk);
void pblk_sysfs_exit(struct gendisk *tdisk);
static inline void *pblk_malloc(size_t size, int type, gfp_t flags)
{
if (type == PBLK_KMALLOC_META)
return kmalloc(size, flags);
return vmalloc(size);
}
static inline void pblk_mfree(void *ptr, int type)
{
if (type == PBLK_KMALLOC_META)
kfree(ptr);
else
vfree(ptr);
}
static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
{
return c_ctx - sizeof(struct nvm_rq);