Re: [Ocfs2-devel] Long io response time doubt

2015-11-25 Thread Eric Ren
Hi Joseph, You've cleared up my confusion! Very good explaination~ Thanks, Eric On 11/26/15 09:34, Joseph Qi wrote: > Hi Eric, > convert has two types, upconvert and downconvert. And please note that, > PR and EX is not compatible. > Assume read node has gotten PR first, then write node wants to

Re: [Ocfs2-devel] Long io response time doubt

2015-11-25 Thread Joseph Qi
Hi Eric, convert has two types, upconvert and downconvert. And please note that, PR and EX is not compatible. Assume read node has gotten PR first, then write node wants to get EX, it requires read node to downconvert PR to NL. Then read node want's to get PR again, write node should downconvert EX