Re: devpts mounts too slowly

["H. Peter Anvin" <hpa@zytor.com>]

Andrew Morton wrote:
>>>
>>> umounts do not appear affected; each umount still take negible time.
>> I think I know what's going on.  /sbin/mount is linked against libselinux
>> /sbin/umount is not.  And FPOS in question blows if you
>> 	* do not have selinuxfs mounted (e.g. because selinux is not enabled)
>> 	* have a lot of mounts.
>>
>> What happens is that this piece of crap checks for presence of selinuxfs
>> on /selinux; then, if the thing isn't there, we go and scan the entire
>> /proc/mounts in search of selinuxfs mounts.
>>
>> If akpm has selinux enabled on his testbox and you don't have it on yours,
>> we have all observations explained.
> 
> CONFIG_SECURITY_SELINUX=y
> CONFIG_SECURITY_SELINUX_BOOTPARAM=y
> CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE=1
> CONFIG_SECURITY_SELINUX_DISABLE=y
> CONFIG_SECURITY_SELINUX_DEVELOP=y
> CONFIG_SECURITY_SELINUX_AVC_STATS=y
> CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
> # CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT is not set
> # CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX is not set
> 

Wow.  It doesn't even check for selinux actually being enabled before
embarking on this stupidity.

FAIL.

	-hpa