On 2020/1/7 5:57, Darrick J. Wong wrote:
So your solution is to split the delalloc reservation to constrain the
allocation to the range that's being operated on?
Yes, I'm trying to split delalloc reservation.
If so, I think a better solution (at least from the perspective of
reducing fragmentation) would be to map the extent unwritten and force a
post-writeback conversion[1] but I got shot down for performance reasons
the last time I suggested that.
I'm wondering if spliting delalloc reservation have the same performance
issue.
Thanks!
Yu Kuai
