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Diffstat (limited to 'fs/f2fs/compress.c')
-rw-r--r--fs/f2fs/compress.c242
1 files changed, 182 insertions, 60 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 1dfb126a0cb2..14262e0f1cd6 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -17,6 +17,33 @@
#include "node.h"
#include <trace/events/f2fs.h>
+static struct kmem_cache *cic_entry_slab;
+static struct kmem_cache *dic_entry_slab;
+
+static void *page_array_alloc(struct inode *inode, int nr)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int size = sizeof(struct page *) * nr;
+
+ if (likely(size <= sbi->page_array_slab_size))
+ return kmem_cache_zalloc(sbi->page_array_slab, GFP_NOFS);
+ return f2fs_kzalloc(sbi, size, GFP_NOFS);
+}
+
+static void page_array_free(struct inode *inode, void *pages, int nr)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int size = sizeof(struct page *) * nr;
+
+ if (!pages)
+ return;
+
+ if (likely(size <= sbi->page_array_slab_size))
+ kmem_cache_free(sbi->page_array_slab, pages);
+ else
+ kfree(pages);
+}
+
struct f2fs_compress_ops {
int (*init_compress_ctx)(struct compress_ctx *cc);
void (*destroy_compress_ctx)(struct compress_ctx *cc);
@@ -130,19 +157,16 @@ struct page *f2fs_compress_control_page(struct page *page)
int f2fs_init_compress_ctx(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
-
- if (cc->nr_rpages)
+ if (cc->rpages)
return 0;
- cc->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ cc->rpages = page_array_alloc(cc->inode, cc->cluster_size);
return cc->rpages ? 0 : -ENOMEM;
}
void f2fs_destroy_compress_ctx(struct compress_ctx *cc)
{
- kfree(cc->rpages);
+ page_array_free(cc->inode, cc->rpages, cc->cluster_size);
cc->rpages = NULL;
cc->nr_rpages = 0;
cc->nr_cpages = 0;
@@ -382,16 +406,17 @@ static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic)
ZSTD_DStream *stream;
void *workspace;
unsigned int workspace_size;
+ unsigned int max_window_size =
+ MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size);
- workspace_size = ZSTD_DStreamWorkspaceBound(MAX_COMPRESS_WINDOW_SIZE);
+ workspace_size = ZSTD_DStreamWorkspaceBound(max_window_size);
workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode),
workspace_size, GFP_NOFS);
if (!workspace)
return -ENOMEM;
- stream = ZSTD_initDStream(MAX_COMPRESS_WINDOW_SIZE,
- workspace, workspace_size);
+ stream = ZSTD_initDStream(max_window_size, workspace, workspace_size);
if (!stream) {
printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initDStream failed\n",
KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id,
@@ -554,13 +579,29 @@ static void f2fs_compress_free_page(struct page *page)
mempool_free(page, compress_page_pool);
}
+#define MAX_VMAP_RETRIES 3
+
+static void *f2fs_vmap(struct page **pages, unsigned int count)
+{
+ int i;
+ void *buf = NULL;
+
+ for (i = 0; i < MAX_VMAP_RETRIES; i++) {
+ buf = vm_map_ram(pages, count, -1);
+ if (buf)
+ break;
+ vm_unmap_aliases();
+ }
+ return buf;
+}
+
static int f2fs_compress_pages(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct f2fs_inode_info *fi = F2FS_I(cc->inode);
const struct f2fs_compress_ops *cops =
f2fs_cops[fi->i_compress_algorithm];
- unsigned int max_len, nr_cpages;
+ unsigned int max_len, new_nr_cpages;
+ struct page **new_cpages;
int i, ret;
trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx,
@@ -575,8 +616,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
max_len = COMPRESS_HEADER_SIZE + cc->clen;
cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE);
- cc->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- cc->nr_cpages, GFP_NOFS);
+ cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages);
if (!cc->cpages) {
ret = -ENOMEM;
goto destroy_compress_ctx;
@@ -590,13 +630,13 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
}
}
- cc->rbuf = vmap(cc->rpages, cc->cluster_size, VM_MAP, PAGE_KERNEL_RO);
+ cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size);
if (!cc->rbuf) {
ret = -ENOMEM;
goto out_free_cpages;
}
- cc->cbuf = vmap(cc->cpages, cc->nr_cpages, VM_MAP, PAGE_KERNEL);
+ cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages);
if (!cc->cbuf) {
ret = -ENOMEM;
goto out_vunmap_rbuf;
@@ -618,16 +658,28 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++)
cc->cbuf->reserved[i] = cpu_to_le32(0);
- nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
+ new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
+
+ /* Now we're going to cut unnecessary tail pages */
+ new_cpages = page_array_alloc(cc->inode, new_nr_cpages);
+ if (!new_cpages) {
+ ret = -ENOMEM;
+ goto out_vunmap_cbuf;
+ }
/* zero out any unused part of the last page */
memset(&cc->cbuf->cdata[cc->clen], 0,
- (nr_cpages * PAGE_SIZE) - (cc->clen + COMPRESS_HEADER_SIZE));
+ (new_nr_cpages * PAGE_SIZE) -
+ (cc->clen + COMPRESS_HEADER_SIZE));
- vunmap(cc->cbuf);
- vunmap(cc->rbuf);
+ vm_unmap_ram(cc->cbuf, cc->nr_cpages);
+ vm_unmap_ram(cc->rbuf, cc->cluster_size);
- for (i = nr_cpages; i < cc->nr_cpages; i++) {
+ for (i = 0; i < cc->nr_cpages; i++) {
+ if (i < new_nr_cpages) {
+ new_cpages[i] = cc->cpages[i];
+ continue;
+ }
f2fs_compress_free_page(cc->cpages[i]);
cc->cpages[i] = NULL;
}
@@ -635,22 +687,24 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
if (cops->destroy_compress_ctx)
cops->destroy_compress_ctx(cc);
- cc->nr_cpages = nr_cpages;
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = new_cpages;
+ cc->nr_cpages = new_nr_cpages;
trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx,
cc->clen, ret);
return 0;
out_vunmap_cbuf:
- vunmap(cc->cbuf);
+ vm_unmap_ram(cc->cbuf, cc->nr_cpages);
out_vunmap_rbuf:
- vunmap(cc->rbuf);
+ vm_unmap_ram(cc->rbuf, cc->cluster_size);
out_free_cpages:
for (i = 0; i < cc->nr_cpages; i++) {
if (cc->cpages[i])
f2fs_compress_free_page(cc->cpages[i]);
}
- kfree(cc->cpages);
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
cc->cpages = NULL;
destroy_compress_ctx:
if (cops->destroy_compress_ctx)
@@ -677,7 +731,7 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
if (bio->bi_status || PageError(page))
dic->failed = true;
- if (refcount_dec_not_one(&dic->ref))
+ if (atomic_dec_return(&dic->pending_pages))
return;
trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx,
@@ -689,8 +743,7 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
goto out_free_dic;
}
- dic->tpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- dic->cluster_size, GFP_NOFS);
+ dic->tpages = page_array_alloc(dic->inode, dic->cluster_size);
if (!dic->tpages) {
ret = -ENOMEM;
goto out_free_dic;
@@ -715,13 +768,13 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
goto out_free_dic;
}
- dic->rbuf = vmap(dic->tpages, dic->cluster_size, VM_MAP, PAGE_KERNEL);
+ dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size);
if (!dic->rbuf) {
ret = -ENOMEM;
goto destroy_decompress_ctx;
}
- dic->cbuf = vmap(dic->cpages, dic->nr_cpages, VM_MAP, PAGE_KERNEL_RO);
+ dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages);
if (!dic->cbuf) {
ret = -ENOMEM;
goto out_vunmap_rbuf;
@@ -738,15 +791,15 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
ret = cops->decompress_pages(dic);
out_vunmap_cbuf:
- vunmap(dic->cbuf);
+ vm_unmap_ram(dic->cbuf, dic->nr_cpages);
out_vunmap_rbuf:
- vunmap(dic->rbuf);
+ vm_unmap_ram(dic->rbuf, dic->cluster_size);
destroy_decompress_ctx:
if (cops->destroy_decompress_ctx)
cops->destroy_decompress_ctx(dic);
out_free_dic:
if (verity)
- refcount_set(&dic->ref, dic->nr_cpages);
+ atomic_set(&dic->pending_pages, dic->nr_cpages);
if (!verity)
f2fs_decompress_end_io(dic->rpages, dic->cluster_size,
ret, false);
@@ -1029,6 +1082,7 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
{
struct compress_ctx cc = {
+ .inode = inode,
.log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
.cluster_size = F2FS_I(inode)->i_cluster_size,
.rpages = fsdata,
@@ -1132,7 +1186,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
*/
down_read(&sbi->node_write);
} else if (!f2fs_trylock_op(sbi)) {
- return -EAGAIN;
+ goto out_free;
}
set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
@@ -1155,15 +1209,14 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
fio.version = ni.version;
- cic = f2fs_kzalloc(sbi, sizeof(struct compress_io_ctx), GFP_NOFS);
+ cic = kmem_cache_zalloc(cic_entry_slab, GFP_NOFS);
if (!cic)
goto out_put_dnode;
cic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
cic->inode = inode;
- refcount_set(&cic->ref, cc->nr_cpages);
- cic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ atomic_set(&cic->pending_pages, cc->nr_cpages);
+ cic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
if (!cic->rpages)
goto out_put_cic;
@@ -1257,11 +1310,13 @@ unlock_continue:
spin_unlock(&fi->i_size_lock);
f2fs_put_rpages(cc);
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = NULL;
f2fs_destroy_compress_ctx(cc);
return 0;
out_destroy_crypt:
- kfree(cic->rpages);
+ page_array_free(cc->inode, cic->rpages, cc->cluster_size);
for (--i; i >= 0; i--)
fscrypt_finalize_bounce_page(&cc->cpages[i]);
@@ -1271,7 +1326,7 @@ out_destroy_crypt:
f2fs_put_page(cc->cpages[i], 1);
}
out_put_cic:
- kfree(cic);
+ kmem_cache_free(cic_entry_slab, cic);
out_put_dnode:
f2fs_put_dnode(&dn);
out_unlock_op:
@@ -1279,6 +1334,9 @@ out_unlock_op:
up_read(&sbi->node_write);
else
f2fs_unlock_op(sbi);
+out_free:
+ page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
+ cc->cpages = NULL;
return -EAGAIN;
}
@@ -1296,7 +1354,7 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
dec_page_count(sbi, F2FS_WB_DATA);
- if (refcount_dec_not_one(&cic->ref))
+ if (atomic_dec_return(&cic->pending_pages))
return;
for (i = 0; i < cic->nr_rpages; i++) {
@@ -1305,8 +1363,8 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
end_page_writeback(cic->rpages[i]);
}
- kfree(cic->rpages);
- kfree(cic);
+ page_array_free(cic->inode, cic->rpages, cic->nr_rpages);
+ kmem_cache_free(cic_entry_slab, cic);
}
static int f2fs_write_raw_pages(struct compress_ctx *cc,
@@ -1388,9 +1446,6 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
struct writeback_control *wbc,
enum iostat_type io_type)
{
- struct f2fs_inode_info *fi = F2FS_I(cc->inode);
- const struct f2fs_compress_ops *cops =
- f2fs_cops[fi->i_compress_algorithm];
int err;
*submitted = 0;
@@ -1405,9 +1460,6 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
err = f2fs_write_compressed_pages(cc, submitted,
wbc, io_type);
- cops->destroy_compress_ctx(cc);
- kfree(cc->cpages);
- cc->cpages = NULL;
if (!err)
return 0;
f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN);
@@ -1424,25 +1476,23 @@ destroy_out:
struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct decompress_io_ctx *dic;
pgoff_t start_idx = start_idx_of_cluster(cc);
int i;
- dic = f2fs_kzalloc(sbi, sizeof(struct decompress_io_ctx), GFP_NOFS);
+ dic = kmem_cache_zalloc(dic_entry_slab, GFP_NOFS);
if (!dic)
return ERR_PTR(-ENOMEM);
- dic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
- cc->log_cluster_size, GFP_NOFS);
+ dic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
if (!dic->rpages) {
- kfree(dic);
+ kmem_cache_free(dic_entry_slab, dic);
return ERR_PTR(-ENOMEM);
}
dic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
dic->inode = cc->inode;
- refcount_set(&dic->ref, cc->nr_cpages);
+ atomic_set(&dic->pending_pages, cc->nr_cpages);
dic->cluster_idx = cc->cluster_idx;
dic->cluster_size = cc->cluster_size;
dic->log_cluster_size = cc->log_cluster_size;
@@ -1453,8 +1503,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
dic->rpages[i] = cc->rpages[i];
dic->nr_rpages = cc->cluster_size;
- dic->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
- dic->nr_cpages, GFP_NOFS);
+ dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages);
if (!dic->cpages)
goto out_free;
@@ -1489,7 +1538,7 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
continue;
f2fs_compress_free_page(dic->tpages[i]);
}
- kfree(dic->tpages);
+ page_array_free(dic->inode, dic->tpages, dic->cluster_size);
}
if (dic->cpages) {
@@ -1498,11 +1547,11 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
continue;
f2fs_compress_free_page(dic->cpages[i]);
}
- kfree(dic->cpages);
+ page_array_free(dic->inode, dic->cpages, dic->nr_cpages);
}
- kfree(dic->rpages);
- kfree(dic);
+ page_array_free(dic->inode, dic->rpages, dic->nr_rpages);
+ kmem_cache_free(dic_entry_slab, dic);
}
void f2fs_decompress_end_io(struct page **rpages,
@@ -1530,3 +1579,76 @@ unlock:
unlock_page(rpage);
}
}
+
+int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi)
+{
+ dev_t dev = sbi->sb->s_bdev->bd_dev;
+ char slab_name[32];
+
+ sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev));
+
+ sbi->page_array_slab_size = sizeof(struct page *) <<
+ F2FS_OPTION(sbi).compress_log_size;
+
+ sbi->page_array_slab = f2fs_kmem_cache_create(slab_name,
+ sbi->page_array_slab_size);
+ if (!sbi->page_array_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi)
+{
+ kmem_cache_destroy(sbi->page_array_slab);
+}
+
+static int __init f2fs_init_cic_cache(void)
+{
+ cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry",
+ sizeof(struct compress_io_ctx));
+ if (!cic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_cic_cache(void)
+{
+ kmem_cache_destroy(cic_entry_slab);
+}
+
+static int __init f2fs_init_dic_cache(void)
+{
+ dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry",
+ sizeof(struct decompress_io_ctx));
+ if (!dic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_dic_cache(void)
+{
+ kmem_cache_destroy(dic_entry_slab);
+}
+
+int __init f2fs_init_compress_cache(void)
+{
+ int err;
+
+ err = f2fs_init_cic_cache();
+ if (err)
+ goto out;
+ err = f2fs_init_dic_cache();
+ if (err)
+ goto free_cic;
+ return 0;
+free_cic:
+ f2fs_destroy_cic_cache();
+out:
+ return -ENOMEM;
+}
+
+void f2fs_destroy_compress_cache(void)
+{
+ f2fs_destroy_dic_cache();
+ f2fs_destroy_cic_cache();
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-22 11:57:02 +0300