lkml.org 
[lkml]   [2007]   [Mar]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] max_loop limit
Date
On Mar 23, 2007, at 19:26:34, Jan Engelhardt wrote:
> here's one. Allocates all the fluff dynamically. It does not create
> any dev nodes by itself, so you need to do it (à la mdadm), but
> you'll get all 1048576 available minors.
>
> +static LIST_HEAD(loop_devices);

Maybe an rbtree would work better here? Maximum number of nodes
traversed to get to the bottom of the tree given 2^(20) loop devices
is 19 as opposed to the 2^(20) for a linked list. Also, to preserve
compatibility with existing userspace loop tools you should probably
always allocate one extra loop device. Keep a "highest used loopdev"
number and create the one after that so that udev will autocreate a
dev node for it.

Cheers,
Kyle Moffett

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

\
 
 \ /
  Last update: 2007-03-29 06:05    [W:0.066 / U:3.560 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site