Hi Alan,
On 8/1/23 18:14, Alan Huang wrote:
2023年8月1日 16:06，Hao Xu <hao.xu@xxxxxxxxx> 写道：
From: Hao Xu <howeyxu@xxxxxxxxxxx>
In FOPEN_DIRECT_IO, page cache may still be there for a file since
private mmap is allowed. Direct write should respect that and invalidate
the corresponding pages so that page cache readers don't get stale data.
Do other filesystems also invalidate page cache in this case?
For now all filesystems that use iomap do this invalidation, see:
__iomap_dio_rw()
e.g. ext4, xfs
Regards,
Hao
