Re: Repeatable Panics with XFS and RAID1 (long)

[Marcelo Tosatti <marcelo@xxxxxxxxxxxxxxxx>]

On Thu, 22 Feb 2001, Marcelo Tosatti wrote:

> 
> 
> On Wed, 21 Feb 2001, Rajagopal Ananthanarayanan wrote:
> 
> > Danny wrote:
> > 
> > > Feb 20 12:51:38 dsc_proto_1 kernel: __alloc_pages: 0-order allocation
> > > failed.
> > 
> > For those seeing __alloc_pages failing, can you please try this patch?
> > With recent code changes, writepage() is used for flushing dirty pages,
> > and this typically happens under memory pressure. So, doing anything
> > expensive to allocate memory under these conditions is bad.
> 
> Ananth, 
> 
> I think allocating memory from the atomic queue (used mainly by in
> interrupt context) to generate dirty data may cause problems.

I'll write the GFP_PAGE_IO thing we talked about RSN to avoid having to
use GFP_ATOMIC.