linux-kernel - Re: [PATCHv3 0/9] introduce on-demand device creation

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Message-ID: <20150427134128.GA708@swordfish>
Date:	Mon, 27 Apr 2015 22:41:28 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>
Cc:	Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCHv3 0/9] introduce on-demand device creation

On (04/27/15 22:21), Sergey Senozhatsky wrote:
> We currently don't support zram on-demand device creation.  The only way
> to have N zram devices is to specify num_devices module parameter (default
> value 1).  That means that if, for some reason, at some point, user wants
> to have N + 1 devies he/she must umount all the existing devices, unload
> the module, load the module passing num_devices equals to N + 1.

argh, please ignore this series. it causes lockdep warning. will resend.

sorry for the noise.

	-ss


> This patchset introduces zram-control sysfs class, which has two sysfs
> attrs:
> 
>  - zram_add     -- add a new zram device
>  - zram_remove  -- remove a specific (device_id) zram device
> 
>     Usage example:
>         # add a new specific zram device
>         cat /sys/class/zram-control/zram_add
>         1
> 
>         # remove a specific zram device
>         echo 4 > /sys/class/zram-control/zram_remove
> 
> 
> V3:
> -- rebase against 4.1
> -- review comments from Minchan were addressed
> -- no sysfs RO tricks anymore
> 
> V2:
> -- quick rebase and cleanup in attempt to catch 4.1 merge window
> 
> Sergey Senozhatsky (9):
>   zram: add `compact` sysfs entry to documentation
>   zram: cosmetic ZRAM_ATTR_RO code formatting tweak
>   zram: use idr instead of `zram_devices' array
>   zram: reorganize code layout
>   zram: remove max_num_devices limitation
>   zram: report every added and removed device
>   zram: trivial: correct flag operations comment
>   zram: return zram device_id from zram_add()
>   zram: add dynamic device add/remove functionality
> 
>  Documentation/blockdev/zram.txt |  29 +-
>  drivers/block/zram/zram_drv.c   | 975 ++++++++++++++++++++++------------------
>  drivers/block/zram/zram_drv.h   |   6 -
>  3 files changed, 558 insertions(+), 452 deletions(-)
> 
> -- 
> 2.4.0.rc3.3.g6eb1401
> 
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