Messages in this thread | | | From | Uday R <> | Date | Mon, 6 Jan 2020 12:43:20 +0530 | Subject | Issue with Kexec memory allocation |
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Hello folks,
I am using kexec to load into the new kernel from the existing kernel. My vmlinuz image size is 6.6MB, initrd size is 18MB, and the root file system size is 715MB. I use kexec command to load the new kernel into memory. I observed that before calling kexec if the available memory is less than 1.33GB then kexec lands into an out of memory issue effectively kexec being killed by OOM-KILLER. I dont get into out of memory issue if i have memory >=1.33GB.
My question is why kexec tries to over allocate memory when the available memory is less than 1.33GB and gets the available memory to ZERO. In case if the available memory is >= 1.33GB before calling kexec, After kexec load, i see the memory consumed by kexec load is approximately equal to size of "linux+initrd+root file system".
Is there a bug in the 'Kexec' code and had been fixed ?
Note: i am using the kernel from a vendor, Just wanted to know if there is no such issue in mainstream code.
Thanks in Advance, Uday
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