linux-kernel - Re: [PATCH v6 0/8] block: prepare for multipage bvecs

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] [day] [month] [year] [list]

Message-ID: <CACVXFVMbvqyEeX4NsuZLANCCQyxwr2_cjLrLT8tR9LUZkwejdg@mail.gmail.com>
Date:	Fri, 10 Jun 2016 10:44:34 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Jens Axboe <axboe@...com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	"open list:DRBD DRIVER" <drbd-dev@...ts.linbit.com>,
	Jan Kara <jack@...e.cz>, Joe Thornber <ejt@...hat.com>,
	Keith Busch <keith.busch@...el.com>,
	Kent Overstreet <kent.overstreet@...il.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Michal Hocko <mhocko@...e.com>,
	Mike Snitzer <snitzer@...hat.com>, NeilBrown <neilb@...e.com>,
	Sagi Grimberg <sagig@...lanox.com>, Shaohua Li <shli@...com>,
	Steven Whitehouse <swhiteho@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	"open list:XFS FILESYSTEM" <xfs@....sgi.com>
Subject: Re: [PATCH v6 0/8] block: prepare for multipage bvecs

On Fri, Jun 10, 2016 at 12:06 AM, Jens Axboe <axboe@...nel.dk> wrote:
> On 05/30/2016 07:34 AM, Ming Lei wrote:
>>
>> Hi,
>>
>> Interests[1] have been shown in multipage bvecs, so this patchset
>> try to prepare for the support and do two things:
>>
>> 1) the 1st 4 patches use bvec iterator to implement iterate_bvec(),
>> then we can drop the non-standard way for iterating bvec, which
>> can be thought as a good cleanup for lib/iov_iter.c
>>
>> 2) remove BIO_MAX_SECTORS and makre BIO_MAX_SIZE as obsolete, and
>> now there is only one user for each. Once multipage bvecs is introduced,
>> one bio may hold lots of sectors, and we should always use sort of
>> BIO_MAX_VECS which should be introduced in future and is similiar
>> with current BIO_MAX_PAGES.
>>
>> The only functional change is iterate_bvec():lib/iov_iter.c
>>
>> xfstests(-a auto) over loop aio is run for ext4/xfs to verify
>> the change and no regression found with this patchset.
>
>
> Added patches 1-7, still waiting for an answer on my reply to #8.

Thanks for adding patches 1-7, and now I just found the added
BIO_MAX_SIZE usage in dm-crypt.c is droped from next, so it is
safe to kill it now.

I will send a new patch #8 against for-4.8/core.

Thanks,
Ming

>
> --
> Jens Axboe
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-block" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html