[ Fixed Steffen Klasserts bouncing email address as per the bounce message ]
> > Somewhere between 3.17.0-rc3 and 3.17.0-rc5 I started seeing dropped ssh > > connections to a couple of test servers with dual AthlonMP (32-bit) and > > 3C90x family of NICs (3Com Corporation 3c980-C 10/100baseTX NIC > > [Python-T] (rev 78) in one server and 3Com Corporation 3c905C-TX/TX-M > > [Tornado] (rev 78) in the other server). Bisect leads to the following > > commit: > > > > 98ea232cf63961fad734cc8c5e07e8915ec73073 is the first bad commit > > commit 98ea232cf63961fad734cc8c5e07e8915ec73073 > > Author: Neil Horman <[email protected]> > > Date: Thu Sep 4 06:13:38 2014 -0400 > > > > 3c59x: avoid panic in boomerang_start_xmit when finding page address: > > ... > > > I'm guessing the above change has uncovered another bug, mostly likely an > exhaustion of dma space on your system. Nothing in the transmit path there > does > any error checking for successful dma mapping, which it really should. I'd be > willing to be that any dma mapping error leads to a leak in the mapping table. > Does your system have an iommu, or does it use swiotlb? If its the latter, > can > you increase the swiotlb table space and see if that relieves the problem? In > the interim, I'll start adding some error checking to the transmit path. # CONFIG_IOMMU_SUPPORT is not set nothing matching iommu or iotlb in dmesg. I thought the system does not have any - K7 CPUs and AMD 760MP chipset with normal AGP gart. [ 3.763519] agpgart-amdk7 0000:00:00.0: AMD 760MP chipset [ 3.782995] agpgart-amdk7 0000:00:00.0: AGP aperture is 64M @ 0xf8000000 -- Meelis Roos ([email protected]) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
