Messages in this thread | | | From | "Leonid Grossman" <> | Subject | pci_alloc_consistent() | Date | Thu, 22 Jan 2004 17:59:47 -0800 |
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Are there any known issues with pci_alloc_consistent() allocating more than 1MB? One of our developers seems to recall a thread but we can't find it...
We are using pci_alloc_consistent() in our 10GbE driver, to allocate memory for DMA transfers between host and device. If we allocate under 1MB, everything works fine. When the allocation is more than 1 MB, allocation call does not return any failure but some data corruption seems to take place beyond the 1 MB space.
Is this a known problem? The system is 2-way Itanium, running 2.4.21 kernel.
Thanks in advance, Leonid
> -----Original Message----- > From: linux-kernel-owner@vger.kernel.org > [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of > Charles Shannon Hendrix > Sent: Thursday, January 22, 2004 3:48 PM > To: Linux Kernel > Subject: Re: Nvidia drivers and 2.6.x kernel > > > Thu, 22 Jan 2004 @ 12:12 +0000, Kieran said: > > > How strange. I run slack 9.1 and 2.6.1, just grabbed the 4496 > > pre-patched file from http://www.sh.nu/download/nvidia/ and > installed it > > as I would on 2.4. Works a charm. > > How's the performance? > > I have found the 4496 and 5328 drivers lowered my performance. > > 5328 is supposed to be faster mip-mapping and faster when > running with vertical blank sync, but I didn't see it myself. > It also caused quite a few sound artifacts from my Live! sound card. > > Anyone done a driver-by-driver benchmark? > > I got tired of it, but here's the performance order on my > system from fastest to slowest: > > 4620 > 3xxx (last stable 3xxx driver) > 4496 > 5328 > > Mostly what I look for are not benchmark numbers, but notable > hesitation in programs and interactive response, and side > effects like bad sound artifacts. > > > > > -- > UNIX/Perl/C/Pizza____________________s h a n n o n@wido !SPAM > maker.com > - > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in the body of a message to > majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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