On 6/1/11, David Rientjes <rientjes@xxxxxxxxxx> wrote: > On Wed, 1 Jun 2011, Dmitry Eremin-Solenikov wrote: > >> I've hit this with IrDA driver on PXA. Also I've seen the report regarding >> other ARM platform (ep-something). Thus I've included Russell in the cc. >> > > So you want to continue to allow the page allocator to return pages from > anywhere, even when GFP_DMA is specified, just as though it was lowmem? Yes and no. I'm asking for the grace period for the drivers authors to be able to fix their code. After a grace period of one or two majors this permission should be removed and your original patch should be effective. > Why don't you actually address the problem with the driver you're > complaining about with the patch below, which I already posted to you a > few days ago? > > If this arm driver is going to be using GFP_DMA unconditionally, it better > require CONFIG_ZONE_DMA for it to actually be meaningful until such time > as it can be removed if it's truly not needed or generalized to only > specific pieces of hardware. No. This only workarounds the bug. And also a possible hundred of other bugs in the PXA/etc. ARM drivers. Instead I'm asking for the way to visualize all such bugs. Do you want to also add such workarounds to some PATA CF driver used on PXA? To _any_ of the drivers allocating the GFP_DMA memory? Then CONFIG_ZONE_DMA would serve no purpose. We can as well to drop that symbol. Believe me. > --- > drivers/net/irda/Kconfig | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/drivers/net/irda/Kconfig b/drivers/net/irda/Kconfig > --- a/drivers/net/irda/Kconfig > +++ b/drivers/net/irda/Kconfig > @@ -374,6 +374,7 @@ config VIA_FIR > config PXA_FICP > tristate "Intel PXA2xx Internal FICP" > depends on ARCH_PXA && IRDA > + select ZONE_DMA > help > Say Y or M here if you want to build support for the PXA2xx > built-in IRDA interface which can support both SIR and FIR. > -- With best wishes Dmitry -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>