AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

f2fs: fix to drop all inmem pages correctly

Browse Source 
In commit 57864ae5ce ("f2fs: limit # of inmemory pages"), we have
limited memory footprint of all inmem pages with 20% of total memory,
otherwise, if we exceed the threshold, we will try to drop all inmem
pages to avoid excessive memory pressure resulting in performance
regression.

But in some unrelated error paths, we will also drop all inmem pages,
which should be wrong, fix it in this patch.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-01-15 17:16:46 +08:00 committed by Jaegeuk Kim
parent f3d98e74fc
commit a2e2e76b23
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/f2fs/data.c
View File

@ -2078,7 +2078,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *page = NULL;
pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
bool need_balance = false;
bool need_balance = false, drop_atomic = false;
block_t blkaddr = NULL_ADDR;
int err = 0;
@ -2087,6 +2087,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
if (f2fs_is_atomic_file(inode) &&
!available_free_memory(sbi, INMEM_PAGES)) {
err = -ENOMEM;
drop_atomic = true;
goto fail;
}
@ -2167,7 +2168,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
fail:
f2fs_put_page(page, 1);
f2fs_write_failed(mapping, pos + len);
if (f2fs_is_atomic_file(inode))
if (drop_atomic)
drop_inmem_pages_all(sbi);
return err;
}