Half billion tries for a HAMMER2 bug

I’m pulling a quote off of IRC to show some of the testing on HAMMER2, specifically as the background for this commit:

14:22 <@dillon_> ^^^ hammer2 bug, could reproduce it around once a day doing a continuous rm -rf on hardlinked snapshots. reproduced about once every 500 million directory entries or so

I am somewhat tickled by the notion that you might have a problem after deleting half a billion directory entries.

Lazy Reading for 2018/06/17

I’m going heavy on history this week.

In Other BSDs for 2018/06/16

Lots of different items, probably because of BSDCan.

CPU bug hardening added to DragonFly

Matthew Dillon’s added some patches to DragonFly related to securing floating point state, following similar work in OpenBSD.  There isn’t a reported catchy-name issue to match it, like Spectre/Meltdown – yet.

(If anyone has a good link to the similar OpenBSD commits, please share; I did not find them on a cursory search.)

Update: the fix is now in 5.2 and an update is recommended.

mkinitrd out, initrd in

There was an optional ‘make initrd’ step in the DragonFly build process, where you can create a small binary to use for mounting encrypted root drives.

Aaron LI has removed mkinitrd in favor of ‘make initrd’, which builds a separate binary to use in exactly those situations.  See the commit message for more detail.  It incidentally creates a ‘/rescue’ directory and works as a rescue ramdisk, similar to other BSDs, if you should ever need it.  (See updated MOTD for details)

Lazy Reading for 2018/06/10

It’s been a busy week and I didn’t have overflow from last week to help, so these are very fresh links.

In Other BSDs for 2018/06/09

BSDCan is running this weekend.  There is, depending on what time you are reading this, a livestream.

BSDNow 249: Router On A Stick

BSDNow 249 is covering a really wide range of topics including an uncommon amount of NetBSD, so I’m going to do the easy thing and repeat the summary: “OpenZFS and DTrace updates in NetBSD, NetBSD network security stack audit, Performance of MySQL on ZFS, OpenSMTP results from p2k18, legacy Windows backup to FreeNAS, ZFS block size importance, and NetBSD as router on a stick.”

Lazy Reading for 2018/06/03

Treat this week: footage of a college animatronic project I was slightly involved in.  See below.

In Other BSDs for 2017/06/02

One of these links will be very useful to someone.