linux-kernel - Re: [PATCH] block: flush queued bios when the process blocks

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]

Message-ID: <5384CE82.90601@kernel.dk>
Date:	Tue, 27 May 2014 11:42:26 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Mikulas Patocka <mpatocka@...hat.com>
CC:	Kent Overstreet <kmo@...erainc.com>, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, "Alasdair G. Kergon" <agk@...hat.com>,
	Mike Snitzer <msnitzer@...hat.com>
Subject: Re: [PATCH] block: flush queued bios when the process blocks

On 2014-05-27 10:26, Mikulas Patocka wrote:
> On Tue, 27 May 2014, Jens Axboe wrote:
>
>> On 2014-05-27 09:23, Mikulas Patocka wrote:
>>
>>> The patch adds bio list flushing to the scheduler just besides plug
>>> flushsing.
>>
>> ... which is exactly why I'm commenting. It'd be great to avoid yet one more
>> scheduler hook for this sort of thing.
>>
>> --
>> Jens Axboe
>
> One could create something like schedule notifier chain, but I'm not sure
> if it is worth the complexity because of just two users. If more users
> come in the future, it could be generalized.

Except such a thing already exists, there are unplug callback chains. 
All I'm asking is that you look into how feasible it would be to use 
something like that, instead of reinventing the wheel.

-- 
Jens Axboe

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