Re: [PATCH 004 of 11] md: Increase the delay before marking metadata clean, and make it configurable.

On Mon, May 01, 2006 at 03:30:19PM +1000, NeilBrown wrote:
> When a md array has been idle (no writes) for 20msecs it is marked as
> 'clean'.  This delay turns out to be too short for some real
> workloads.  So increase it to 200msec (the time to update the metadata
> should be a tiny fraction of that) and make it sysfs-configurable.

What does this mean, 'too short'? What happens in that case, backing block
devices are still busy writing? When making this configurable, the help text
better explain what the trade offs are.

Thanks.

-- 
http://www.PowerDNS.com      Open source, database driven DNS Software 
http://netherlabs.nl              Open and Closed source services
-
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: [PATCH 004 of 11] md: Increase the delay before marking metadata clean, and make it configurable.
    • From: Neil Brown <[email protected]>

• References:
  • [PATCH 000 of 11] md: Introduction - assort md enhancements for 2.6.18
    • From: NeilBrown <[email protected]>
  • [PATCH 004 of 11] md: Increase the delay before marking metadata clean, and make it configurable.
    • From: NeilBrown <[email protected]>

• Prev by Date: Re: frame buffer driver
• Next by Date: Re: + fix-compile-error-undefined-reference-for-sparc64.patch added to -mm tree
• Previous by thread: Re: [PATCH 004 of 11] md: Increase the delay before marking metadata clean, and make it configurable.
• Next by thread: Re: [PATCH 004 of 11] md: Increase the delay before marking metadata clean, and make it configurable.
• 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]