Re: Discard support (was Re: [PATCH] swap: send callback when swap slot is freed)

Bill Davidsen wrote:

I assume that it really is artificial, rather than the device really 
being ready for another operation (other than another TRIM). I lack the 
hardware, but the test would be the time to complete a read, trim and 
read, and two trim and read operations. Just my thought that the TRIM in 
progress may only block the next TRIM, rather than other operations.

I don't know his test sequence but READ is not the likely command
before and after TRIM unless we are talking about TRIM being issued
only in delayed host garbage collection.  Filesystems send WRITES
during delete.

jim