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f2fs: support POSIX_FADV_DONTNEED drop compressed page cache

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Previously, compressed page cache drop when clean page cache, but
POSIX_FADV_DONTNEED can't clean compressed page cache because raw page
don't have private data, and won't call f2fs_invalidate_compress_pages.
This commit call f2fs_invalidate_compress_pages() directly in
f2fs_file_fadvise() for POSIX_FADV_DONTNEED case.

Signed-off-by: Fengnan Chang <changfengnan@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Fengnan Chang
2021-11-29 10:13:41 +08:00
committed by Jaegeuk Kim
parent 485eaa5339
commit 26f2048b7e
1 changed files with 9 additions and 3 deletions
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12
fs/f2fs/file.c
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@@ -4795,12 +4795,12 @@ out:
static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
int advice)
{
struct inode *inode;
struct address_space *mapping;
struct backing_dev_info *bdi;
struct inode *inode = file_inode(filp);
int err;
if (advice == POSIX_FADV_SEQUENTIAL) {
inode = file_inode(filp);
if (S_ISFIFO(inode->i_mode))
return -ESPIPE;
@@ -4817,7 +4817,13 @@ static int f2fs_file_fadvise(struct file *filp, loff_t offset, loff_t len,
return 0;
}
return generic_fadvise(filp, offset, len, advice);
err = generic_fadvise(filp, offset, len, advice);
if (!err && advice == POSIX_FADV_DONTNEED &&
test_opt(F2FS_I_SB(inode), COMPRESS_CACHE) &&
f2fs_compressed_file(inode))
f2fs_invalidate_compress_pages(F2FS_I_SB(inode), inode->i_ino);
return err;
}
#ifdef CONFIG_COMPAT