Re: [PATCH] Increase number of dynamic inodes in procfs (2.6.5)

[Nathan Lynch <nathanl@austin.ibm.com>]

Andrew Morton wrote:
> Nathan Lynch <nathanl@austin.ibm.com> wrote:
> 
>>>This open-codes a simple version of lib/idr.c.  Please use lib/idr.c
>>
>> > instead.  There's an example in fs/super.c
>>
>> Ok, thanks for the tip.  Is this better?
> 
> 
> Looks OK.  How well tested was it?  Nothing calls init_proc_inum_idr().
> Maybe all-zeroes happens to work.

Sorry, I tested it all day; it just happens to work :)  Olof just 
pointed the error out to me, too.

I successfully allocated 152371 proc entries using this.

During testing I made sure that release_inode_number was actually 
releasing id's by inserting a call to idr_find before idr_remove, and 
using a dummy token for idr_get_new instead of NULL.  I can pass those 
bits along if you like.

BTW I found the use of idr in kernel/posix-timers.c to be more 
consistent with the comments in lib/idr.c so I emulated that.  I think 
the call to idr_remove in fs/super.c::set_anon_super needs to be holding 
unnamed_dev_lock.

Thanks,
Nathan