> From: "Mike Chambers" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Subject: Re: mm: critical shortage of bounce buffers
> Date: Sun, 21 Oct 2001 16:15:25 -0500
> Reply-To: [EMAIL PROTECTED]
>
>> ----- Original Message -----
>> From: "Robert G. 'Doc' Savage" <[EMAIL PROTECTED]>
>> To: <[EMAIL PROTECTED]>
>> Sent: Sunday, October 21, 2001 3:56 PM
>> Subject: Re: mm: critical shortage of bounce buffers
>>
>> I'm confused by this. IIRC the performance breakthrough appeared in
>> 2.4.10pre11 with Andreas Arkangeli's VM patch. I don't understand why Red
>> Hat released a 2.4.9-6 kernel when the key performance and security fixes
>> didn't appear until 2.4.10 and 2.4.12, respectively. Is it a "band-aid"
>> with those two patches retrofitted?
>>
> Remember that key personnel that work on the official kernel also work for
> RedHat (see Alan Cox). So some and/or a lot of the patches are incorporated
> into RedHat's kernel even if a version or two lower depending on what the
> fix is for.
This reinforces Robert's point about confusion.
Unless explicitly stated in the errata, why/how would a user expect/know that
other patches are included in a particular kernel ?
The errata for kernel-*2.4.9-6 states the problem as:
"A vulnerability has been found in the ptrace code of the kernel (ptrace is
the part that allows program debuggers to run) that could be abused by
local users to gain root privileges."
No mention of VM problems here.
Another point of concern is that Redhat is seriously targeting the
"big-end of town" but it seems as though testing is not being carried out
on machines relevant to this market, i.e. multi-processor, large memory.
So why release kernels that *can not use swap* in a high memory environment?
Don't get me wrong - Redhat is my distro' of choice and my hope is that my
comments are taken as *constructive* criticism.
>
> Don't know if that is the case now but I am assuming that happens a decent
> amount anyway one way or another.
>
> Mike
-------------------------------------
Steve Batson
System Administrator
Victorian Institute of Animal Science
Victoria, Australia
Email: [EMAIL PROTECTED]
--------------------------------------
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