Re: Proposal for "proper" durable fsync() and fdatasync()

Andrew Morton
2008-02-26T07:43:46Z

On Tue, 26 Feb 2008 07:26:50 +0000 Jamie Lokier <jamie@shareable.org> wrote:

> (It would be nicer if sync_file_range()
> took a vector of ranges for better elevator scheduling, but let's
> ignore that :-)

Two passes:

Pass 1: shove each of the segments into the queue with
SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE

Pass 2: wait for them all to complete and return accumulated result
with SYNC_FILE_RANGE_WAIT_AFTER