mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
[PATCH] BLOCK: Separate the bounce buffering code from the highmem code [try #6]
Move the bounce buffer code from mm/highmem.c to mm/bounce.c so that it can be more easily disabled when the block layer is disabled. !!!NOTE!!! There may be a bug in this code: Should init_emergency_pool() be contingent on CONFIG_HIGHMEM? Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
David Howells
Jens Axboe
parent
b398f6bff9
commit
831058dec3
@ -12,6 +12,9 @@ obj-y := bootmem.o filemap.o mempool.o oom_kill.o fadvise.o \
|
||||
readahead.o swap.o truncate.o vmscan.o \
|
||||
prio_tree.o util.o mmzone.o vmstat.o $(mmu-y)
|
||||
|
||||
ifeq ($(CONFIG_MMU),y)
|
||||
obj-y += bounce.o
|
||||
endif
|
||||
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o thrash.o
|
||||
obj-$(CONFIG_HUGETLBFS) += hugetlb.o
|
||||
obj-$(CONFIG_NUMA) += mempolicy.o
|
||||
|
||||
302
mm/bounce.c
Normal file
302
mm/bounce.c
Normal file
@ -0,0 +1,302 @@
|
||||
/* bounce buffer handling for block devices
|
||||
*
|
||||
* - Split from highmem.c
|
||||
*/
|
||||
|
||||
#include <linux/mm.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/swap.h>
|
||||
#include <linux/bio.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/mempool.h>
|
||||
#include <linux/blkdev.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/hash.h>
|
||||
#include <linux/highmem.h>
|
||||
#include <linux/blktrace_api.h>
|
||||
#include <asm/tlbflush.h>
|
||||
|
||||
#define POOL_SIZE 64
|
||||
#define ISA_POOL_SIZE 16
|
||||
|
||||
static mempool_t *page_pool, *isa_page_pool;
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
static __init int init_emergency_pool(void)
|
||||
{
|
||||
struct sysinfo i;
|
||||
si_meminfo(&i);
|
||||
si_swapinfo(&i);
|
||||
|
||||
if (!i.totalhigh)
|
||||
return 0;
|
||||
|
||||
page_pool = mempool_create_page_pool(POOL_SIZE, 0);
|
||||
BUG_ON(!page_pool);
|
||||
printk("highmem bounce pool size: %d pages\n", POOL_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
__initcall(init_emergency_pool);
|
||||
|
||||
/*
|
||||
* highmem version, map in to vec
|
||||
*/
|
||||
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned char *vto;
|
||||
|
||||
local_irq_save(flags);
|
||||
vto = kmap_atomic(to->bv_page, KM_BOUNCE_READ);
|
||||
memcpy(vto + to->bv_offset, vfrom, to->bv_len);
|
||||
kunmap_atomic(vto, KM_BOUNCE_READ);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
#else /* CONFIG_HIGHMEM */
|
||||
|
||||
#define bounce_copy_vec(to, vfrom) \
|
||||
memcpy(page_address((to)->bv_page) + (to)->bv_offset, vfrom, (to)->bv_len)
|
||||
|
||||
#endif /* CONFIG_HIGHMEM */
|
||||
|
||||
/*
|
||||
* allocate pages in the DMA region for the ISA pool
|
||||
*/
|
||||
static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
|
||||
{
|
||||
return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
|
||||
}
|
||||
|
||||
/*
|
||||
* gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
|
||||
* as the max address, so check if the pool has already been created.
|
||||
*/
|
||||
int init_emergency_isa_pool(void)
|
||||
{
|
||||
if (isa_page_pool)
|
||||
return 0;
|
||||
|
||||
isa_page_pool = mempool_create(ISA_POOL_SIZE, mempool_alloc_pages_isa,
|
||||
mempool_free_pages, (void *) 0);
|
||||
BUG_ON(!isa_page_pool);
|
||||
|
||||
printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Simple bounce buffer support for highmem pages. Depending on the
|
||||
* queue gfp mask set, *to may or may not be a highmem page. kmap it
|
||||
* always, it will do the Right Thing
|
||||
*/
|
||||
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
|
||||
{
|
||||
unsigned char *vfrom;
|
||||
struct bio_vec *tovec, *fromvec;
|
||||
int i;
|
||||
|
||||
__bio_for_each_segment(tovec, to, i, 0) {
|
||||
fromvec = from->bi_io_vec + i;
|
||||
|
||||
/*
|
||||
* not bounced
|
||||
*/
|
||||
if (tovec->bv_page == fromvec->bv_page)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* fromvec->bv_offset and fromvec->bv_len might have been
|
||||
* modified by the block layer, so use the original copy,
|
||||
* bounce_copy_vec already uses tovec->bv_len
|
||||
*/
|
||||
vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;
|
||||
|
||||
flush_dcache_page(tovec->bv_page);
|
||||
bounce_copy_vec(tovec, vfrom);
|
||||
}
|
||||
}
|
||||
|
||||
static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
|
||||
{
|
||||
struct bio *bio_orig = bio->bi_private;
|
||||
struct bio_vec *bvec, *org_vec;
|
||||
int i;
|
||||
|
||||
if (test_bit(BIO_EOPNOTSUPP, &bio->bi_flags))
|
||||
set_bit(BIO_EOPNOTSUPP, &bio_orig->bi_flags);
|
||||
|
||||
/*
|
||||
* free up bounce indirect pages used
|
||||
*/
|
||||
__bio_for_each_segment(bvec, bio, i, 0) {
|
||||
org_vec = bio_orig->bi_io_vec + i;
|
||||
if (bvec->bv_page == org_vec->bv_page)
|
||||
continue;
|
||||
|
||||
dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
|
||||
mempool_free(bvec->bv_page, pool);
|
||||
}
|
||||
|
||||
bio_endio(bio_orig, bio_orig->bi_size, err);
|
||||
bio_put(bio);
|
||||
}
|
||||
|
||||
static int bounce_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
bounce_end_io(bio, page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bounce_end_io_write_isa(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
bounce_end_io(bio, isa_page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
|
||||
{
|
||||
struct bio *bio_orig = bio->bi_private;
|
||||
|
||||
if (test_bit(BIO_UPTODATE, &bio->bi_flags))
|
||||
copy_to_high_bio_irq(bio_orig, bio);
|
||||
|
||||
bounce_end_io(bio, pool, err);
|
||||
}
|
||||
|
||||
static int bounce_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
__bounce_end_io_read(bio, page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bounce_end_io_read_isa(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
__bounce_end_io_read(bio, isa_page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
|
||||
mempool_t *pool)
|
||||
{
|
||||
struct page *page;
|
||||
struct bio *bio = NULL;
|
||||
int i, rw = bio_data_dir(*bio_orig);
|
||||
struct bio_vec *to, *from;
|
||||
|
||||
bio_for_each_segment(from, *bio_orig, i) {
|
||||
page = from->bv_page;
|
||||
|
||||
/*
|
||||
* is destination page below bounce pfn?
|
||||
*/
|
||||
if (page_to_pfn(page) < q->bounce_pfn)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* irk, bounce it
|
||||
*/
|
||||
if (!bio)
|
||||
bio = bio_alloc(GFP_NOIO, (*bio_orig)->bi_vcnt);
|
||||
|
||||
to = bio->bi_io_vec + i;
|
||||
|
||||
to->bv_page = mempool_alloc(pool, q->bounce_gfp);
|
||||
to->bv_len = from->bv_len;
|
||||
to->bv_offset = from->bv_offset;
|
||||
inc_zone_page_state(to->bv_page, NR_BOUNCE);
|
||||
|
||||
if (rw == WRITE) {
|
||||
char *vto, *vfrom;
|
||||
|
||||
flush_dcache_page(from->bv_page);
|
||||
vto = page_address(to->bv_page) + to->bv_offset;
|
||||
vfrom = kmap(from->bv_page) + from->bv_offset;
|
||||
memcpy(vto, vfrom, to->bv_len);
|
||||
kunmap(from->bv_page);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* no pages bounced
|
||||
*/
|
||||
if (!bio)
|
||||
return;
|
||||
|
||||
/*
|
||||
* at least one page was bounced, fill in possible non-highmem
|
||||
* pages
|
||||
*/
|
||||
__bio_for_each_segment(from, *bio_orig, i, 0) {
|
||||
to = bio_iovec_idx(bio, i);
|
||||
if (!to->bv_page) {
|
||||
to->bv_page = from->bv_page;
|
||||
to->bv_len = from->bv_len;
|
||||
to->bv_offset = from->bv_offset;
|
||||
}
|
||||
}
|
||||
|
||||
bio->bi_bdev = (*bio_orig)->bi_bdev;
|
||||
bio->bi_flags |= (1 << BIO_BOUNCED);
|
||||
bio->bi_sector = (*bio_orig)->bi_sector;
|
||||
bio->bi_rw = (*bio_orig)->bi_rw;
|
||||
|
||||
bio->bi_vcnt = (*bio_orig)->bi_vcnt;
|
||||
bio->bi_idx = (*bio_orig)->bi_idx;
|
||||
bio->bi_size = (*bio_orig)->bi_size;
|
||||
|
||||
if (pool == page_pool) {
|
||||
bio->bi_end_io = bounce_end_io_write;
|
||||
if (rw == READ)
|
||||
bio->bi_end_io = bounce_end_io_read;
|
||||
} else {
|
||||
bio->bi_end_io = bounce_end_io_write_isa;
|
||||
if (rw == READ)
|
||||
bio->bi_end_io = bounce_end_io_read_isa;
|
||||
}
|
||||
|
||||
bio->bi_private = *bio_orig;
|
||||
*bio_orig = bio;
|
||||
}
|
||||
|
||||
void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
|
||||
{
|
||||
mempool_t *pool;
|
||||
|
||||
/*
|
||||
* for non-isa bounce case, just check if the bounce pfn is equal
|
||||
* to or bigger than the highest pfn in the system -- in that case,
|
||||
* don't waste time iterating over bio segments
|
||||
*/
|
||||
if (!(q->bounce_gfp & GFP_DMA)) {
|
||||
if (q->bounce_pfn >= blk_max_pfn)
|
||||
return;
|
||||
pool = page_pool;
|
||||
} else {
|
||||
BUG_ON(!isa_page_pool);
|
||||
pool = isa_page_pool;
|
||||
}
|
||||
|
||||
blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE);
|
||||
|
||||
/*
|
||||
* slow path
|
||||
*/
|
||||
__blk_queue_bounce(q, bio_orig, pool);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(blk_queue_bounce);
|
||||
281
mm/highmem.c
281
mm/highmem.c
@ -29,13 +29,6 @@
|
||||
#include <linux/blktrace_api.h>
|
||||
#include <asm/tlbflush.h>
|
||||
|
||||
static mempool_t *page_pool, *isa_page_pool;
|
||||
|
||||
static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
|
||||
{
|
||||
return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
|
||||
}
|
||||
|
||||
/*
|
||||
* Virtual_count is not a pure "count".
|
||||
* 0 means that it is not mapped, and has not been mapped
|
||||
@ -217,282 +210,8 @@ void fastcall kunmap_high(struct page *page)
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(kunmap_high);
|
||||
|
||||
#define POOL_SIZE 64
|
||||
|
||||
static __init int init_emergency_pool(void)
|
||||
{
|
||||
struct sysinfo i;
|
||||
si_meminfo(&i);
|
||||
si_swapinfo(&i);
|
||||
|
||||
if (!i.totalhigh)
|
||||
return 0;
|
||||
|
||||
page_pool = mempool_create_page_pool(POOL_SIZE, 0);
|
||||
BUG_ON(!page_pool);
|
||||
printk("highmem bounce pool size: %d pages\n", POOL_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
__initcall(init_emergency_pool);
|
||||
|
||||
/*
|
||||
* highmem version, map in to vec
|
||||
*/
|
||||
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned char *vto;
|
||||
|
||||
local_irq_save(flags);
|
||||
vto = kmap_atomic(to->bv_page, KM_BOUNCE_READ);
|
||||
memcpy(vto + to->bv_offset, vfrom, to->bv_len);
|
||||
kunmap_atomic(vto, KM_BOUNCE_READ);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
#else /* CONFIG_HIGHMEM */
|
||||
|
||||
#define bounce_copy_vec(to, vfrom) \
|
||||
memcpy(page_address((to)->bv_page) + (to)->bv_offset, vfrom, (to)->bv_len)
|
||||
|
||||
#endif
|
||||
|
||||
#define ISA_POOL_SIZE 16
|
||||
|
||||
/*
|
||||
* gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
|
||||
* as the max address, so check if the pool has already been created.
|
||||
*/
|
||||
int init_emergency_isa_pool(void)
|
||||
{
|
||||
if (isa_page_pool)
|
||||
return 0;
|
||||
|
||||
isa_page_pool = mempool_create(ISA_POOL_SIZE, mempool_alloc_pages_isa,
|
||||
mempool_free_pages, (void *) 0);
|
||||
BUG_ON(!isa_page_pool);
|
||||
|
||||
printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Simple bounce buffer support for highmem pages. Depending on the
|
||||
* queue gfp mask set, *to may or may not be a highmem page. kmap it
|
||||
* always, it will do the Right Thing
|
||||
*/
|
||||
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
|
||||
{
|
||||
unsigned char *vfrom;
|
||||
struct bio_vec *tovec, *fromvec;
|
||||
int i;
|
||||
|
||||
__bio_for_each_segment(tovec, to, i, 0) {
|
||||
fromvec = from->bi_io_vec + i;
|
||||
|
||||
/*
|
||||
* not bounced
|
||||
*/
|
||||
if (tovec->bv_page == fromvec->bv_page)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* fromvec->bv_offset and fromvec->bv_len might have been
|
||||
* modified by the block layer, so use the original copy,
|
||||
* bounce_copy_vec already uses tovec->bv_len
|
||||
*/
|
||||
vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;
|
||||
|
||||
flush_dcache_page(tovec->bv_page);
|
||||
bounce_copy_vec(tovec, vfrom);
|
||||
}
|
||||
}
|
||||
|
||||
static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
|
||||
{
|
||||
struct bio *bio_orig = bio->bi_private;
|
||||
struct bio_vec *bvec, *org_vec;
|
||||
int i;
|
||||
|
||||
if (test_bit(BIO_EOPNOTSUPP, &bio->bi_flags))
|
||||
set_bit(BIO_EOPNOTSUPP, &bio_orig->bi_flags);
|
||||
|
||||
/*
|
||||
* free up bounce indirect pages used
|
||||
*/
|
||||
__bio_for_each_segment(bvec, bio, i, 0) {
|
||||
org_vec = bio_orig->bi_io_vec + i;
|
||||
if (bvec->bv_page == org_vec->bv_page)
|
||||
continue;
|
||||
|
||||
dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
|
||||
mempool_free(bvec->bv_page, pool);
|
||||
}
|
||||
|
||||
bio_endio(bio_orig, bio_orig->bi_size, err);
|
||||
bio_put(bio);
|
||||
}
|
||||
|
||||
static int bounce_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
bounce_end_io(bio, page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bounce_end_io_write_isa(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
bounce_end_io(bio, isa_page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
|
||||
{
|
||||
struct bio *bio_orig = bio->bi_private;
|
||||
|
||||
if (test_bit(BIO_UPTODATE, &bio->bi_flags))
|
||||
copy_to_high_bio_irq(bio_orig, bio);
|
||||
|
||||
bounce_end_io(bio, pool, err);
|
||||
}
|
||||
|
||||
static int bounce_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
__bounce_end_io_read(bio, page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int bounce_end_io_read_isa(struct bio *bio, unsigned int bytes_done, int err)
|
||||
{
|
||||
if (bio->bi_size)
|
||||
return 1;
|
||||
|
||||
__bounce_end_io_read(bio, isa_page_pool, err);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
|
||||
mempool_t *pool)
|
||||
{
|
||||
struct page *page;
|
||||
struct bio *bio = NULL;
|
||||
int i, rw = bio_data_dir(*bio_orig);
|
||||
struct bio_vec *to, *from;
|
||||
|
||||
bio_for_each_segment(from, *bio_orig, i) {
|
||||
page = from->bv_page;
|
||||
|
||||
/*
|
||||
* is destination page below bounce pfn?
|
||||
*/
|
||||
if (page_to_pfn(page) < q->bounce_pfn)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* irk, bounce it
|
||||
*/
|
||||
if (!bio)
|
||||
bio = bio_alloc(GFP_NOIO, (*bio_orig)->bi_vcnt);
|
||||
|
||||
to = bio->bi_io_vec + i;
|
||||
|
||||
to->bv_page = mempool_alloc(pool, q->bounce_gfp);
|
||||
to->bv_len = from->bv_len;
|
||||
to->bv_offset = from->bv_offset;
|
||||
inc_zone_page_state(to->bv_page, NR_BOUNCE);
|
||||
|
||||
if (rw == WRITE) {
|
||||
char *vto, *vfrom;
|
||||
|
||||
flush_dcache_page(from->bv_page);
|
||||
vto = page_address(to->bv_page) + to->bv_offset;
|
||||
vfrom = kmap(from->bv_page) + from->bv_offset;
|
||||
memcpy(vto, vfrom, to->bv_len);
|
||||
kunmap(from->bv_page);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* no pages bounced
|
||||
*/
|
||||
if (!bio)
|
||||
return;
|
||||
|
||||
/*
|
||||
* at least one page was bounced, fill in possible non-highmem
|
||||
* pages
|
||||
*/
|
||||
__bio_for_each_segment(from, *bio_orig, i, 0) {
|
||||
to = bio_iovec_idx(bio, i);
|
||||
if (!to->bv_page) {
|
||||
to->bv_page = from->bv_page;
|
||||
to->bv_len = from->bv_len;
|
||||
to->bv_offset = from->bv_offset;
|
||||
}
|
||||
}
|
||||
|
||||
bio->bi_bdev = (*bio_orig)->bi_bdev;
|
||||
bio->bi_flags |= (1 << BIO_BOUNCED);
|
||||
bio->bi_sector = (*bio_orig)->bi_sector;
|
||||
bio->bi_rw = (*bio_orig)->bi_rw;
|
||||
|
||||
bio->bi_vcnt = (*bio_orig)->bi_vcnt;
|
||||
bio->bi_idx = (*bio_orig)->bi_idx;
|
||||
bio->bi_size = (*bio_orig)->bi_size;
|
||||
|
||||
if (pool == page_pool) {
|
||||
bio->bi_end_io = bounce_end_io_write;
|
||||
if (rw == READ)
|
||||
bio->bi_end_io = bounce_end_io_read;
|
||||
} else {
|
||||
bio->bi_end_io = bounce_end_io_write_isa;
|
||||
if (rw == READ)
|
||||
bio->bi_end_io = bounce_end_io_read_isa;
|
||||
}
|
||||
|
||||
bio->bi_private = *bio_orig;
|
||||
*bio_orig = bio;
|
||||
}
|
||||
|
||||
void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
|
||||
{
|
||||
mempool_t *pool;
|
||||
|
||||
/*
|
||||
* for non-isa bounce case, just check if the bounce pfn is equal
|
||||
* to or bigger than the highest pfn in the system -- in that case,
|
||||
* don't waste time iterating over bio segments
|
||||
*/
|
||||
if (!(q->bounce_gfp & GFP_DMA)) {
|
||||
if (q->bounce_pfn >= blk_max_pfn)
|
||||
return;
|
||||
pool = page_pool;
|
||||
} else {
|
||||
BUG_ON(!isa_page_pool);
|
||||
pool = isa_page_pool;
|
||||
}
|
||||
|
||||
blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE);
|
||||
|
||||
/*
|
||||
* slow path
|
||||
*/
|
||||
__blk_queue_bounce(q, bio_orig, pool);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(blk_queue_bounce);
|
||||
|
||||
#if defined(HASHED_PAGE_VIRTUAL)
|
||||
|
||||
#define PA_HASH_ORDER 7
|
||||
|
||||
Loading…
Reference in New Issue
Block a user