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Steven Rostedt
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Steven Rostedt

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When you look at a patch, and all your mind says is "I wonder what is happening on G+", taking a 2.5 mile walk sets things right again.
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Andrew Bradford (bradfa)'s profile photoGeert Uytterhoeven's profile photoSteven Rostedt's profile photo
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If you really have to know, it was this patch:

https://lkml.org/lkml/2015/2/19/251
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Steven Rostedt

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Grumble,  I really hate it when a git bisect for a crash ends on a commit that just modifies documentation. And it's not even a comment in code. It's the help text in a config file.

Now to search where the bisect failed.
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Andrew Chant's profile photoVlastimil Babka's profile photoJon Masters's profile photoGeert Uytterhoeven's profile photo
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Reminds me of bisecting the "your multi_defconfig kernel became too big to boot" problem...
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Steven Rostedt

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Steven Rostedt originally shared:
 
"What devious message can I write on his Google+ account?"
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Subject: Reminder: End of Support for Windows Server - Webinar - March 25

Really? How the heck did I get on this spam mailing list. And this was to my Red Hat email address!
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Behan Webster's profile photoJuan Quintela's profile photo
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I am sure you commented sometime somewhere that it would be a good idea to migrate some machine from Windows to a linux distro.  For the email that theiy choose, clearly you suggested Red Hat.

See????  There is not so difficult to find a valid reason to receive SPAM.  Now search for one explanation for the ones about penis enlargement O:-)
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Steven Rostedt

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Hugh Grant calls my Alma Mater (where I got my Masters), "a not so great university in the middle of nowhere".

Hey, it is ranked 88 out of the 201 national universities, and for price has been listed several times as the top 10 best valued universities.

But he may be right about me living in the middle of nowhere.

http://www.today.com/video/today/56959944#56959944
Video on Today: The actor joins TODAY to talk about his new romantic comedy “Rewrite,” in which he plays a struggling Hollywood screenwriter and college professor, and jokes about a new study that found the British accent is the sexiest.
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Neil Brown's profile photoSteven Rostedt's profile photo
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I don't really care, but it is cool that they made a movie about my old university. Too bad the outside scenes were not filmed on location. But some of it was.
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Steven Rostedt

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For those flying in for the Linux Collaboration Summit, what is the best (cheapest) option? Flying into SF or OAK and renting a car, or flying into Santa Rosa directly?

What are others doing?
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Jes Sorensen's profile photoScott Murray's profile photo
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I took the bus from SF to Santa Rosa when Plumbers was there, it wasn't too bad.
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Steven Rostedt

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The systemd Project Forks the Linux Kernel

I'm expecting to see an official announcement about this in two days.

http://distrowatch.com/weekly.php?issue=20150330#community
News and feature lists of Linux and BSD distributions.
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Vladimir Pantelic's profile photoYinghai Lu's profile photoStefano Stabellini's profile photoCihangir Aktürk's profile photo
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+Paul McKenney I really hope that is true, so it could mobilize Linus spend some time to have something like git!!!
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Steven Rostedt

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"Today happens to be my day!"
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silly cat...
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Steven Rostedt

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This can't be. After spending the day writing crazy IPI scheduling code that sends request back and forth to CPUs, after getting it to compile, it booted on my first try!

This means there's something really wrong with this patch.
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Frédéric Weisbecker's profile photoJohannes Thumshirn's profile photoSteven Rostedt's profile photoPaul McKenney's profile photo
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Well, if it makes you feel better, earlier today I managed to mess up a patch to RCU's CPU-hotplug code.  Seems I set the bit when the CPU went offline and cleared it when it came online, the opposite of what the rest of RCU expected.  Needless to say, rcutorture objected rather strenuously.
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Steven Rostedt

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Bah! I didn't realize my last comment was only shared with "my circles". WTF, I never want to post something private. When did the default change. I don't recall ever modifying that myself.

Sad part is, I can't make a private post public :-p
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Sergey Senozhatsky's profile photoScott Murray's profile photoSteven Rostedt's profile photoDenys Dmytriyenko's profile photo
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+Steven Rostedt isn't that the magic feature invented by Apple couple years ago?
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Steven Rostedt

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Grumble, I upgraded my main server and rebooted, and now it wont boot. Latest kernels get stuck early in the initram code.  But I can get further with an older 3.14 kernel (need to bisect that). But that gets stuck at:

[FAILED] Failed to start Remount Root and Kernel File Systems.
See 'systemctl status systemd-remount-fs.service' for details.

Um, it hangs here. How the fsck am I suppose to be able to run systemctl to see the details!!!

Off to playing with init=/bin/bash to see what's up.
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Pantelis Antoniou's profile photoSteven Rostedt's profile photoCristian Rodriguez's profile photodigi owl's profile photo
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+Steven Rostedt is booting with  "systemd.confirm_spawn emergency" enough for your usecase ? 
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Steven Rostedt

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For my new laptop, I encrypted the 8 GB swap partition and the 300GB /home partition. The swap partition took a half hour to write random data to. It's been all night and my /home partition is only at 62% complete. It should be done in another 8 hours or so  :-p
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Jes Sorensen's profile photoKenneth Johansson's profile photoSteven Rostedt's profile photoLinus Torvalds's profile photo
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Btw, as for writing speed: you don't want to just do streaming writes and buffer it out until memory fills up or the OS decides that there's too much dirty data and just stalls you waiting for it to write out.

You can use direct IO, but that's not actually the real issue. The real issue is that you want to start writeout at sane points, and wait (on earlier writes - while still having more writeout going that you are not waiting for).

And you can easily do that with regular writes too, if you just use sync_file_range(). The optimal sequence tends to be something like:

loop {
     write out reasonable chunk (say 8mb)
     start writeout on previous chunk
     wait for writeout on two-chunks-back
}

where "start writeout" is SYNC_FILE_RANGE_WRITE, and "wait for writeout" is SYNC_FILE_RANGE_WAIT_AFTER.

I sometimes really wish we had an easy interface to just tell the kernel to do that for some big streaming write to get good steady-state IO. As it is, I've written the above pattern a few too many times..
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Have him in circles
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Ajith Adapa's profile photo
Stephen Pilon's profile photo
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