REQ_HARDBARRIER and REQ_SOFTBARRIER

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 for a request to have this? Can I reorder two requests with
these flags set? How is SOFTBARRIER different from HARDBARRIER?

I appreciate your time and help.

Thanks much.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Follow-Ups:
- Re: REQ_HARDBARRIER and REQ_SOFTBARRIER
  - From: Jens Axboe <[email protected]>

Prev by Date: Re: [PATCH] Undo some of the pseudo-security madness
Next by Date: Re: [PATCH 0/4] coredump: core dump masking support v3
Previous by thread: [PATCH] USB Elan FTDI: check for workqueue creation v2
Next by thread: Re: REQ_HARDBARRIER and REQ_SOFTBARRIER
Index(es):
- Date
- Thread

[Index of Archives] [Kernel Newbies] [Netfilter] [Bugtraq] [Photo] [Stuff] [Gimp] [Yosemite News] [MIPS Linux] [ARM Linux] [Linux Security] [Linux RAID] [Video 4 Linux] [Linux for the blind] [Linux Resources]