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posted by Fnord666 on Sunday June 06 2021, @05:51PM   Printer-friendly
from the 640k-is-more-memory-than-anyone-will-ever-need dept.

Linux x86/x86_64 Will Now Always Reserve The First 1MB Of RAM - Phoronix:

The Linux x86/x86_64 kernel code already had logic in place for reserving portions of the first 1MB of RAM to avoid the BIOS or kernel potentially clobbering that space among other reasons while now Linux 5.13 is doing away with that "wankery" and will just unconditionally always reserve the first 1MB of RAM.

[...] The motivation now for Linux 5.13 in getting that 1MB unconditional reservation in place for Linux x86/x86_64 stems from a bug report around an AMD Ryzen system being unbootable on Linux 5.13 since the change to consolidate their early memory reservations handling. Just unconditionally doing the first 1MB makes things much simpler to handle.

The change was sent in this morning as part of x86/urgent. "Do away with all the wankery of reserving X amount of memory in the first megabyte to prevent BIOS corrupting it and simply and unconditionally reserve the whole first megabyte."

no more wankery


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  • (Score: 2) by Reziac on Monday June 07 2021, @01:10PM

    by Reziac (2489) on Monday June 07 2021, @01:10PM (#1142721) Homepage

    RedHat6, early Ubuntus (back when they were sending out CDs), several others of the era (at the time getting ANY linux to run was hit-or-miss). Mighta been before your time. But I remember seeing it go by in the load crawl and thinking... that's why its performance sucks. Why is it loading that? what else do I clearly not need but don't know by name?

    --
    And there is no Alkibiades to come back and save us from ourselves.
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