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CC to netdev where this report might find better answers Ian Jeffray a écrit : > All, > > I moved from kernel 2.6.25.4 to 2.6.26 yesterday and observed that > large files sent via Apache2 are partially corrupt. > > This appears to be linked to sendfile() -- disabling the use of > sendfile in the apache config (EnableSendfile Off) allows it to > function as normal. > > My system is a simple Core2Duo running Debian lenny/sid; nothing > special, and I have never observed problems like this before. > > The problem feels certainly related to sendfile() since the data > reads correctly from disc in other programs, and via CIFS etc. > > The corruption happens part-way in to the file... I've no exact > figure but it would seem like maybe 32KB -- I'm seeing broken > PNGs served from Apache, where the top few dozen lines decode > correctly, and the rest is garbage. > > I've made basically no configuration changes between 2.6.25.4 and > 2.6.26 and have explicitly tried both enabling and disabling the > new PAT support to no effect. > > This is completely repeatable and reproducible. > > Is anyone else seeing this broken behaviour? > What kind of network adapter are you using ? (lspci | grep -i ether) If you disable TCP segmentation offload on this NIC (ethtool -K eth0 tso off) , is this problem still present ? -- 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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