Re: [RFC 1/2] MD: raid5 trim support

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Tue, Apr 17, 2012 at 1:35 AM, Shaohua Li <shli@xxxxxxxxxx> wrote:
> Discard for raid4/5/6 has limitation. If discard request size is small, we do
> discard for one disk, but we need calculate parity and write parity disk.  To
> correctly calculate parity, zero_after_discard must be guaranteed.

I'm wondering if we could use the new bad blocks facility to mark
discarded ranges so we don't necessarily need determinate data after
discard.

...but I have not looked into it beyond that.

--
Dan
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[ATA RAID]     [Linux SCSI Target Infrastructure]     [Managing RAID on Linux]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device-Mapper]     [Kernel]     [Linux Books]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Photos]     [Yosemite Photos]     [Yosemite News]     [AMD 64]     [Linux Networking]

Add to Google Powered by Linux