linux-kernel - Re: [patch 0/7] Add TRIM support for raid linear/0/1/10

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 14 Mar 2012 13:24:22 +1100
From:	NeilBrown <neilb@...e.de>
To:	Shaohua Li <shli@...ionio.com>
Cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
	axboe@...nel.dk
Subject: Re: [patch 0/7] Add TRIM support for raid linear/0/1/10

On Mon, 12 Mar 2012 11:04:12 +0800 Shaohua Li <shli@...ionio.com> wrote:

> The patches add TRIM support for raid linear/0/1/10. I'll add TRIM support for
> raid 4/5/6 later. The implementation is pretty straightforward and
> self-explained.
> 
> Thanks,
> Shaohua

Thanks.
They look mostly OK.

In raid0.c, I think you'll need to change

		/* Sanity check -- queue functions should prevent this happening */
		if (bio->bi_vcnt != 1 ||
		    bio->bi_idx != 0)
			goto bad_map;

to also allow for 'bi_vcnt == 0' like you did in bio_split.

Also I wonder about handling failure in RAID1.
I think the code will currently treat it like a write error, and
maybe record a bad block (then fail the device is writing the badblock
record fails). Is that what were want?

And of course resync/recovery will mess up the discarded sector information,
so this isn't a complete solution for RAID1.  But  it is a reasonable start.

Thanks,
NeilBrown

Download attachment "signature.asc" of type "application/pgp-signature" (829 bytes)