Re: REQ_HARDBARRIER and REQ_SOFTBARRIER

2007-02-24 Thread Jens Axboe
On Sat, Feb 24 2007, V P wrote: > Hi, > > I'm trying to modify the ordering of I/O requests in Linux kernel, and > came across the barrier flags REQ_HARDBARRIER and REQ_SOFTBARRIER. > > One thing I noticed (which might be wrong) is that all the requests > have both

REQ_HARDBARRIER and REQ_SOFTBARRIER

2007-02-24 Thread V P
Hi, I'm trying to modify the ordering of I/O requests in Linux kernel, and came across the barrier flags REQ_HARDBARRIER and REQ_SOFTBARRIER. One thing I noticed (which might be wrong) is that all the requests have both these flags set. What is the significance of these flags? Is it a must

REQ_HARDBARRIER and REQ_SOFTBARRIER

2007-02-24 Thread V P
Hi, I'm trying to modify the ordering of I/O requests in Linux kernel, and came across the barrier flags REQ_HARDBARRIER and REQ_SOFTBARRIER. One thing I noticed (which might be wrong) is that all the requests have both these flags set. What is the significance of these flags? Is it a must

Re: REQ_HARDBARRIER and REQ_SOFTBARRIER

2007-02-24 Thread Jens Axboe
On Sat, Feb 24 2007, V P wrote: Hi, I'm trying to modify the ordering of I/O requests in Linux kernel, and came across the barrier flags REQ_HARDBARRIER and REQ_SOFTBARRIER. One thing I noticed (which might be wrong) is that all the requests have both these flags set. What