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Thursday, May 30 • 12:00pm - 12:50pm
kdump: Improve Reliability on Kernel Switching - Takao Indoh, Fujitsu

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One of the biggest problem on kdump is that kdump kernel can be unstable after switched from first kernel. The kdump kernel boot is disturbed by device interruption or DMA which is derived from I/O issued in first kernel, it causes kernel panic, driver error, and at last kdump fails. Recently this problem surfaces when iommu is used for PCI passthrough on KVM guest. This presentation shows introduction of kdump reliability problem and its solution by resetting devices at kdump kernel boot time to stop ongoing DMA and cleaning up them.

The audience is expected to be interested in kdump, especially its reliability, to have basic skills to operate linux system, and to have very basic kernel knowledge if interested also in technical aspects. Knowledge of device(PCI, DMA, etc) is helpful to understand presentation more deeply.


Takao Indoh

software engineer, Fujitsu
Takao Indoh has been working for support service of Linux system in Fujitsu since 2001, especially working for crash dump for mission critical server, and has also committed several open source communities relevant to crash dump framework, LKCD(Linux Kernel Crash Dump), diskdump... Read More →

Thursday May 30, 2013 12:00pm - 12:50pm

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