Re: [Bug #14620] WARNING: at mm/page_alloc.c:1805 __alloc_pages_nodemask

Theodore Tso
2009-11-17T02:43:18Z

On Mon, Nov 16, 2009 at 11:37:47PM +0100, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.31. Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14620
> Subject : WARNING: at mm/page_alloc.c:1805 __alloc_pages_nodemask
> Submitter : Rogério Brito <rbrito-qczF+2RCDl1fyO9Q7EP/yw@public.gmane.org>
> Date : 2009-11-06 23:10 (11 days old)
> References : http://marc.info/?l=linux-kernel&m=125754907413892&w=4

This isn't technically a regression, since the warning is simply
complaining about something that apparently ext4 has been doing for a
long time, which is that it allocates some very large order data
buffers. So the change referenced simply printed a warning message
that complained about the fact.

The actual problem will be fixed in 2.6.32, as we no longer allocate
the big data buffers at mount time.

- Ted