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f2fs: skip encrypted inode in ASYNC IPU policy 

Async request may be throttled in block layer, so page for async may keep WRITE_BACK
for a long time.

For encrytped inode, we need wait on page writeback no matter if the device supports
BDI_CAP_STABLE_WRITES. This may result in a higher waiting page writeback time for
async encrypted inode page.

This patch skips IPU for encrypted inode's updating write.

Signed-off-by: Hou Pengyang <houpengyang@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Hou Pengyang 2017-04-21 12:41:48 +00:00 committed by Jaegeuk Kim
parent a788189305
commit 4086d3f61b
1 changed files with 2 additions and 1 deletions
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3
fs/f2fs/segment.h
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@ -593,7 +593,8 @@ static inline bool need_inplace_update(struct inode *inode,
*/
if (policy & (0x1 << F2FS_IPU_ASYNC) &&
fio && fio->op == REQ_OP_WRITE &&
!(fio->op_flags & REQ_SYNC))
!(fio->op_flags & REQ_SYNC) &&
!f2fs_encrypted_inode(inode))
return true;
/* this is only set during fdatasync */