forked from luck/tmp_suning_uos_patched
f2fs: compress: introduce page array slab cache
Add a per-sbi slab cache "f2fs_page_array_entry-%u:%u" for memory allocation of page pointer array in compress context. Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: Fix wrong memory allocation] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
Jaegeuk Kim
parent
3a22e9ac71
commit
3108303170
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@ -17,6 +17,30 @@
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#include "node.h"
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#include <trace/events/f2fs.h>
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static void *page_array_alloc(struct inode *inode, int nr)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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unsigned int size = sizeof(struct page *) * nr;
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if (likely(size <= sbi->page_array_slab_size))
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return kmem_cache_zalloc(sbi->page_array_slab, GFP_NOFS);
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return f2fs_kzalloc(sbi, size, GFP_NOFS);
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}
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static void page_array_free(struct inode *inode, void *pages, int nr)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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unsigned int size = sizeof(struct page *) * nr;
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if (!pages)
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return;
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if (likely(size <= sbi->page_array_slab_size))
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kmem_cache_free(sbi->page_array_slab, pages);
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else
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kfree(pages);
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}
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struct f2fs_compress_ops {
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int (*init_compress_ctx)(struct compress_ctx *cc);
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void (*destroy_compress_ctx)(struct compress_ctx *cc);
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@ -130,19 +154,16 @@ struct page *f2fs_compress_control_page(struct page *page)
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int f2fs_init_compress_ctx(struct compress_ctx *cc)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
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if (cc->nr_rpages)
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return 0;
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cc->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
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cc->log_cluster_size, GFP_NOFS);
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cc->rpages = page_array_alloc(cc->inode, cc->cluster_size);
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return cc->rpages ? 0 : -ENOMEM;
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}
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void f2fs_destroy_compress_ctx(struct compress_ctx *cc)
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{
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kfree(cc->rpages);
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page_array_free(cc->inode, cc->rpages, cc->cluster_size);
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cc->rpages = NULL;
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cc->nr_rpages = 0;
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cc->nr_cpages = 0;
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@ -573,11 +594,11 @@ static void *f2fs_vmap(struct page **pages, unsigned int count)
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static int f2fs_compress_pages(struct compress_ctx *cc)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
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struct f2fs_inode_info *fi = F2FS_I(cc->inode);
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const struct f2fs_compress_ops *cops =
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f2fs_cops[fi->i_compress_algorithm];
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unsigned int max_len, nr_cpages;
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unsigned int max_len, new_nr_cpages;
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struct page **new_cpages;
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int i, ret;
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trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx,
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@ -592,8 +613,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
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max_len = COMPRESS_HEADER_SIZE + cc->clen;
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cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE);
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cc->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
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cc->nr_cpages, GFP_NOFS);
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cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages);
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if (!cc->cpages) {
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ret = -ENOMEM;
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goto destroy_compress_ctx;
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@ -635,16 +655,28 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
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for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++)
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cc->cbuf->reserved[i] = cpu_to_le32(0);
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nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
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new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE);
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/* Now we're going to cut unnecessary tail pages */
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new_cpages = page_array_alloc(cc->inode, new_nr_cpages);
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if (!new_cpages) {
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ret = -ENOMEM;
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goto out_vunmap_cbuf;
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}
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/* zero out any unused part of the last page */
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memset(&cc->cbuf->cdata[cc->clen], 0,
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(nr_cpages * PAGE_SIZE) - (cc->clen + COMPRESS_HEADER_SIZE));
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(new_nr_cpages * PAGE_SIZE) -
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(cc->clen + COMPRESS_HEADER_SIZE));
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vm_unmap_ram(cc->cbuf, cc->nr_cpages);
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vm_unmap_ram(cc->rbuf, cc->cluster_size);
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for (i = nr_cpages; i < cc->nr_cpages; i++) {
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for (i = 0; i < cc->nr_cpages; i++) {
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if (i < new_nr_cpages) {
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new_cpages[i] = cc->cpages[i];
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continue;
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}
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f2fs_compress_free_page(cc->cpages[i]);
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cc->cpages[i] = NULL;
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}
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@ -652,7 +684,9 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
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if (cops->destroy_compress_ctx)
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cops->destroy_compress_ctx(cc);
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cc->nr_cpages = nr_cpages;
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page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
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cc->cpages = new_cpages;
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cc->nr_cpages = new_nr_cpages;
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trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx,
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cc->clen, ret);
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@ -667,7 +701,7 @@ static int f2fs_compress_pages(struct compress_ctx *cc)
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if (cc->cpages[i])
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f2fs_compress_free_page(cc->cpages[i]);
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}
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kfree(cc->cpages);
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page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
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cc->cpages = NULL;
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destroy_compress_ctx:
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if (cops->destroy_compress_ctx)
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@ -706,8 +740,7 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
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goto out_free_dic;
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}
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dic->tpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
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dic->cluster_size, GFP_NOFS);
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dic->tpages = page_array_alloc(dic->inode, dic->cluster_size);
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if (!dic->tpages) {
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ret = -ENOMEM;
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goto out_free_dic;
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@ -1046,6 +1079,7 @@ bool f2fs_compress_write_end(struct inode *inode, void *fsdata,
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{
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struct compress_ctx cc = {
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.inode = inode,
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.log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
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.cluster_size = F2FS_I(inode)->i_cluster_size,
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.rpages = fsdata,
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@ -1149,7 +1183,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
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*/
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down_read(&sbi->node_write);
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} else if (!f2fs_trylock_op(sbi)) {
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return -EAGAIN;
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goto out_free;
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}
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set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
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@ -1179,8 +1213,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
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cic->magic = F2FS_COMPRESSED_PAGE_MAGIC;
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cic->inode = inode;
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atomic_set(&cic->pending_pages, cc->nr_cpages);
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cic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
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cc->log_cluster_size, GFP_NOFS);
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cic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
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if (!cic->rpages)
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goto out_put_cic;
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@ -1274,11 +1307,13 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
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spin_unlock(&fi->i_size_lock);
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f2fs_put_rpages(cc);
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page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
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cc->cpages = NULL;
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f2fs_destroy_compress_ctx(cc);
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return 0;
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out_destroy_crypt:
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kfree(cic->rpages);
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page_array_free(cc->inode, cic->rpages, cc->cluster_size);
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for (--i; i >= 0; i--)
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fscrypt_finalize_bounce_page(&cc->cpages[i]);
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@ -1296,6 +1331,9 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
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up_read(&sbi->node_write);
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else
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f2fs_unlock_op(sbi);
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out_free:
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page_array_free(cc->inode, cc->cpages, cc->nr_cpages);
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cc->cpages = NULL;
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return -EAGAIN;
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}
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@ -1322,7 +1360,7 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
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end_page_writeback(cic->rpages[i]);
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}
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kfree(cic->rpages);
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page_array_free(cic->inode, cic->rpages, cic->nr_rpages);
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kfree(cic);
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}
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@ -1419,8 +1457,6 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
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err = f2fs_write_compressed_pages(cc, submitted,
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wbc, io_type);
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kfree(cc->cpages);
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cc->cpages = NULL;
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if (!err)
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return 0;
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f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN);
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@ -1446,8 +1482,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
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if (!dic)
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return ERR_PTR(-ENOMEM);
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dic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) <<
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cc->log_cluster_size, GFP_NOFS);
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dic->rpages = page_array_alloc(cc->inode, cc->cluster_size);
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if (!dic->rpages) {
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kfree(dic);
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return ERR_PTR(-ENOMEM);
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@ -1466,8 +1501,7 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
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dic->rpages[i] = cc->rpages[i];
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dic->nr_rpages = cc->cluster_size;
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dic->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
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dic->nr_cpages, GFP_NOFS);
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dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages);
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if (!dic->cpages)
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goto out_free;
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@ -1502,7 +1536,7 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
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continue;
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f2fs_compress_free_page(dic->tpages[i]);
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}
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kfree(dic->tpages);
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page_array_free(dic->inode, dic->tpages, dic->cluster_size);
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}
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if (dic->cpages) {
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@ -1511,10 +1545,10 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
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continue;
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f2fs_compress_free_page(dic->cpages[i]);
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}
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kfree(dic->cpages);
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page_array_free(dic->inode, dic->cpages, dic->nr_cpages);
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}
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kfree(dic->rpages);
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page_array_free(dic->inode, dic->rpages, dic->nr_rpages);
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kfree(dic);
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}
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@ -1543,3 +1577,25 @@ void f2fs_decompress_end_io(struct page **rpages,
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unlock_page(rpage);
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}
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}
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int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi)
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{
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dev_t dev = sbi->sb->s_bdev->bd_dev;
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char slab_name[32];
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sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev));
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sbi->page_array_slab_size = sizeof(struct page *) <<
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F2FS_OPTION(sbi).compress_log_size;
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sbi->page_array_slab = f2fs_kmem_cache_create(slab_name,
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sbi->page_array_slab_size);
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if (!sbi->page_array_slab)
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return -ENOMEM;
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return 0;
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}
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void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi)
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{
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kmem_cache_destroy(sbi->page_array_slab);
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}
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@ -1622,6 +1622,11 @@ struct f2fs_sb_info {
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struct kmem_cache *inline_xattr_slab; /* inline xattr entry */
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unsigned int inline_xattr_slab_size; /* default inline xattr slab size */
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#ifdef CONFIG_F2FS_FS_COMPRESSION
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struct kmem_cache *page_array_slab; /* page array entry */
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unsigned int page_array_slab_size; /* default page array slab size */
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#endif
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};
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struct f2fs_private_dio {
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@ -3929,6 +3934,8 @@ void f2fs_decompress_end_io(struct page **rpages,
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int f2fs_init_compress_ctx(struct compress_ctx *cc);
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void f2fs_destroy_compress_ctx(struct compress_ctx *cc);
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void f2fs_init_compress_info(struct f2fs_sb_info *sbi);
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int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi);
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void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
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#else
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static inline bool f2fs_is_compressed_page(struct page *page) { return false; }
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static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
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@ -3945,6 +3952,8 @@ static inline struct page *f2fs_compress_control_page(struct page *page)
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}
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static inline int f2fs_init_compress_mempool(void) { return 0; }
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static inline void f2fs_destroy_compress_mempool(void) { }
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static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; }
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static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
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#endif
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static inline void set_compress_context(struct inode *inode)
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@ -1288,6 +1288,7 @@ static void f2fs_put_super(struct super_block *sb)
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kfree(sbi->raw_super);
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destroy_device_list(sbi);
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f2fs_destroy_page_array_cache(sbi);
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f2fs_destroy_xattr_caches(sbi);
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mempool_destroy(sbi->write_io_dummy);
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#ifdef CONFIG_QUOTA
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@ -3620,13 +3621,16 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
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err = f2fs_init_xattr_caches(sbi);
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if (err)
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goto free_io_dummy;
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err = f2fs_init_page_array_cache(sbi);
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if (err)
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goto free_xattr_cache;
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/* get an inode for meta space */
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sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
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if (IS_ERR(sbi->meta_inode)) {
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f2fs_err(sbi, "Failed to read F2FS meta data inode");
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err = PTR_ERR(sbi->meta_inode);
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goto free_xattr_cache;
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goto free_page_array_cache;
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}
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err = f2fs_get_valid_checkpoint(sbi);
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@ -3902,6 +3906,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
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make_bad_inode(sbi->meta_inode);
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iput(sbi->meta_inode);
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sbi->meta_inode = NULL;
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free_page_array_cache:
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f2fs_destroy_page_array_cache(sbi);
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free_xattr_cache:
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f2fs_destroy_xattr_caches(sbi);
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free_io_dummy:
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