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authorChao Yu <yuchao0@huawei.com>2018-06-04 23:20:51 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2018-06-04 14:33:27 -0700
commitdfa742803fbbd8b82790c152600e09c5ad99caca (patch)
tree59a2825a37a0c70f9112515d5480d7ffe26ad907 /include
parentc29fd0c0e26dacb7a33ad166587059818a94b4e0 (diff)
downloadlinux-dfa742803fbbd8b82790c152600e09c5ad99caca.tar.bz2
f2fs: fix to clear FI_VOLATILE_FILE correctly
Thread A Thread B - f2fs_release_file - clear_inode_flag(FI_VOLATILE_FILE) - wb_writeback - writeback_sb_inodes - __writeback_single_inode - do_writepages - f2fs_write_data_pages - __write_data_page all volatile file's pages are writebacked to storage - set_inode_flag(FI_DROP_CACHE) - filemap_fdatawrite There is a hole that mm can flush all dirty pages of volatile file as inode is not tagged with both FI_VOLATILE_FILE and FI_DROP_CACHE flags, we should never writeback the page #0 and also it's unneeded to writeback other pages. This patch adjusts to relocate clear_inode_flag(FI_VOLATILE_FILE), so that FI_VOLATILE_FILE flag can be remained before all dirty pages were dropped to avoid issue. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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