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Diffstat (limited to '2005/flow-accounting-ols2005/OLS2005/goyal/goyal-abstract.tex')
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diff --git a/2005/flow-accounting-ols2005/OLS2005/goyal/goyal-abstract.tex b/2005/flow-accounting-ols2005/OLS2005/goyal/goyal-abstract.tex new file mode 100644 index 0000000..a396e49 --- /dev/null +++ b/2005/flow-accounting-ols2005/OLS2005/goyal/goyal-abstract.tex @@ -0,0 +1,30 @@ + +% Registration Kdump, A Kexec based kernel crash dumping +% mechanism +% Vivek Goyal (vgoyal@in.ibm.com) + +Kdump is a kexec-based kernel crash dumping +mechanism, which is being perceived as a +reliable crash dumping solution for Linux. In +this paper we discuss what kexec is and what +it can do in general case. Kexec has been +modified to boot a new kernel even in a system +crash event. This paper includes the details +about the changes made in kexec to handle the +panic situations. Given the fact that kexec +enables booting into a new kernel while +preserving the memory contents in a crash +scenario, kdump uses this feature to capture +the kernel crash dump. Physical memory layout +and processor state are encoded in ELF Core +format and these headers are stored in a +reserved section of memory. Upon a crash, new +kernel boots up from reserved memory and +provides a platform to retrieve stored elf +headers and capture the crash dump. We briefly +discuss elf core header creation and dump +capture mechanism and also detail how to +configure and use kdump feature. + + + |