[fuse-devel] write/read sizes are not consistent during IO

[Yue Li <yl...@pa...>]

I think my problem is a possible duplication of the issue in this old post:

https://sourceforge.net/p/fuse/mailman/message/20856700/

In my test, I enabled async_dio, and writeback_cache in the init function.

When writing a large file, most of the time, the write size is the same, 
say 131072, however, sometimes it became 4096, or 65536 or other sizes. 
The place where such change happens appeared to be random. It could 
happen in the very beginning or in the middle. And the occurrences of 
such changes are not very frequent.

Same thing happens when doing read().

I'm wondering why does this happen?

And how to make the sizes always the same for all the writes (besides 
the last write)?

Best,

Yue