Linus Torvalds reply about Meltdown and Spectre. Post: 303011891

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The Lounge War Stories Linus Torvalds reply about Meltdown and Spectre. Post 303011891 by wisecracker on Thursday 25th of January 2018 05:34:25 AM

01-25-2018

Registered User

Quote:

Originally Posted by dodona

.. for a only hypothetical problem.

Perhaps, perhaps not; a hardware design problem that goes back decades just to get performance figures to sell their CPUs is more than bad to say the least - especially when the manufacturers knew about it.
Also, it can't be that hypothetical if it has been proven to work. It is the big/gigantic sytems that will be affected by these patches not so much the piffling little stuff like my MacBook Pro. I can handle a performance hit knowing about it now but can the big guns? <- Rhetorical!

But unless one has experience of writing kernels and OSes then one can't possibly know how difficult it is to create patches, (that will inherently give a performance hit just to _correct_ a deliberate manufacturing fault for profit), that will not slow things down too much.

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git-http-fetch

GIT-HTTP-FETCH(1)						    Git Manual							 GIT-HTTP-FETCH(1)

NAME

       git-http-fetch - Download from a remote git repository via HTTP

SYNOPSIS

       git http-fetch [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [--stdin] <commit> <url>

DESCRIPTION

       Downloads a remote git repository via HTTP.

OPTIONS

       commit-id
	   Either the hash or the filename under [URL]/refs/ to pull.

       -c
	   Get the commit objects.

       -t
	   Get trees associated with the commit objects.

       -a
	   Get all the objects.

       -v
	   Report what is downloaded.

       -w <filename>
	   Writes the commit-id into the filename under $GIT_DIR/refs/<filename> on the local end after the transfer is complete.

       --stdin
	   Instead of a commit id on the command line (which is not expected in this case), git http-fetch expects lines on stdin in the format

	       <commit-id>['	'<filename-as-in--w>]

       --recover
	   Verify that everything reachable from target is fetched. Used after an earlier fetch is interrupted.

AUTHOR

       Written by Linus Torvalds <torvalds@osdl.org[1]>

DOCUMENTATION

       Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org[2]>.

GIT

       Part of the git(1) suite

NOTES

	1. torvalds@osdl.org
	   mailto:torvalds@osdl.org

	2. git@vger.kernel.org
	   mailto:git@vger.kernel.org

Git 1.7.1							    07/05/2010							 GIT-HTTP-FETCH(1)