linux-kernel - Re: 2.6.25-rc7-git2: Reported regressions from 2.6.24

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Date:	Fri, 28 Mar 2008 17:10:43 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Pawel Staszewski <pstaszewski@...com.pl>,
	Christoph Lameter <clameter@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>
Subject: Re: 2.6.25-rc7-git2: Reported regressions from 2.6.24

On Friday, 28 of March 2008, Linus Torvalds wrote:
> 
> On Thu, 27 Mar 2008, Rafael J. Wysocki wrote:
> >
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=9412
> > Subject		: commit a878539ef994787c447a98c2e3ba0fe3dad984ec breaks boot on SB600 AHCI
> > Submitter	: Srihari Vijayaraghavan <sriharivijayaraghavan@...oo.com.au>
> > Date		: 2008-03-12 17:15 (16 days old)
> > Handled-By	: Jeff Garzik <jgarzik@...ox.com>
> > 		  Richard Zhao <richard.zhao@....com>
> 
> Fixed by 4cde32fc4b32e96a99063af3183acdfd54c563f0, methinks.

Closed.

> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=9962
> > Subject		: mount: could not find filesystem
> > Submitter	: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
> > Date		: 2008-02-12 14:34 (45 days old)
> > References	: http://lkml.org/lkml/2008/2/12/91
> > Handled-By	: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> > 		  Yinghai Lu <yhlu.kernel@...il.com>
> 
> Needs more info. The original oops that opened it is fixed, but..
> 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=9976
> > Subject		: BUG: 2.6.25-rc1: iptables postrouting setup causes oops
> > Submitter	: Ben Nizette <bn@...sdigital.com>
> > Date		: 2008-02-12 12:46 (45 days old)
> > References	: http://lkml.org/lkml/2008/2/12/148
> > Handled-By	: Haavard Skinnemoen <hskinnemoen@...el.com>
> 
> This one seems gone (and was apparently AVR-only):
> 
> http://lkml.org/lkml/2008/2/13/607:
>   "What ever the problem is it isn't immediately apparent in latest git so
>    I guess we'll just have to keep our eyes peeled."

Closed, too.
    
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=9978
> > Subject		: 2.6.25-rc1: volanoMark regression
> > Submitter	: Zhang, Yanmin <yanmin_zhang@...ux.intel.com>
> > Date		: 2008-02-13 10:30 (44 days old)
> > References	: http://lkml.org/lkml/2008/2/13/128
> > 		  http://lkml.org/lkml/2008/3/12/52
> > 		  http://lkml.org/lkml/2008/3/18/81
> > Handled-By	: Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>
> > 		  Balbir Singh <balbir@...ux.vnet.ibm.com>
> 
> Hmm. It is a regression on one machine (2x quad-core stoakley), but not 
> another (4x quad-core tigerton).
> 
> Interestingly, the stoakley box numbers have apparently been all over the 
> map.
> 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=10318
> > Subject		: WARNING: at arch/x86/mm/highmem_32.c:43 kmap_atomic_prot+0x87/0x184()
> > Submitter	: Pawel Staszewski <pstaszewski@...com.pl>
> > Date		: 2008-03-25 02:50 (3 days old)
> 
> Andrew and seems to have debugged this down to a kzalloc(GFP_ATOMIC) or 
> similar.
> 
> I wonder if the bug is in that commit 
> 3811dbf67162bd08412f1b0e02e554f353e93bdb ("SLUB: remove useless masking 
> of GFP_ZERO"), because I don't think that masking was at all useless and I 
> think my original 7fd272550bd43cc1d7289ef0ab2fa50de137e767 was correct.
> 
> That apparently bogus commit says "GFP_ZERO is already masked out in 
> new_slab()", but gfpflags is not just used for new_slab(), but for 
> kmalloc_large() too.  Which does *not* clear GFP_ZERO.
> 
> Pawel, does reverting 3811dbf67162bd08412f1b0e02e554f353e93bdb fix it for 
> you?
> 
> Also, Rafael - do these reminder emails also go to the people who are 
> mentioned in the regressions (especially people who are set up as being 
> "hanled-by" or having patches for the problem)? 

No, they don't.  I need to do some scriptwork to make that happen.

Thanks,
Rafael
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