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f2fs: compress: delay temp page allocation 

Currently, we allocate temp pages which is used to pad hole in
cluster during read IO submission, it may take long time before
releasing them in f2fs_decompress_pages(), since they are only
used as temp output buffer in decompression context, so let's
just do the allocation in that context to reduce time of memory
pool resource occupation.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2020-07-25 09:17:48 +08:00 committed by Jaegeuk Kim
parent 944dd22ea4
commit b2f57a8e6b
1 changed files with 21 additions and 16 deletions
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37
fs/f2fs/compress.c
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@ -670,6 +670,7 @@ void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity)
const struct f2fs_compress_ops *cops =
f2fs_cops[fi->i_compress_algorithm];
int ret;
int i;
dec_page_count(sbi, F2FS_RD_DATA);
@ -688,6 +689,26 @@ 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);
if (!dic->tpages) {
ret = -ENOMEM;
goto out_free_dic;
}
for (i = 0; i < dic->cluster_size; i++) {
if (dic->rpages[i]) {
dic->tpages[i] = dic->rpages[i];
continue;
}
dic->tpages[i] = f2fs_compress_alloc_page();
if (!dic->tpages[i]) {
ret = -ENOMEM;
goto out_free_dic;
}
}
if (cops->init_decompress_ctx) {
ret = cops->init_decompress_ctx(dic);
if (ret)
@ -1449,22 +1470,6 @@ struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
dic->cpages[i] = page;
}
dic->tpages = f2fs_kzalloc(sbi, sizeof(struct page *) *
dic->cluster_size, GFP_NOFS);
if (!dic->tpages)
goto out_free;
for (i = 0; i < dic->cluster_size; i++) {
if (cc->rpages[i]) {
dic->tpages[i] = cc->rpages[i];
continue;
}
dic->tpages[i] = f2fs_compress_alloc_page();
if (!dic->tpages[i])
goto out_free;
}
return dic;
out_free: