Brad Fitzpatrick
@bradfitz.com
I do computers. Married to @radkat.fitzpat.com. Three kids. Xoogler.
Go (#golang) team 2010~2020. Made LiveJournal, OpenID, memcached. Currently at @Tailscale.com making WireGuard easy.
Seattle, WA // Bainbridge
Go (#golang) team 2010~2020. Made LiveJournal, OpenID, memcached. Currently at @Tailscale.com making WireGuard easy.
Seattle, WA // Bainbridge
Go to the hardware store and hunt for xmas light clips that aren't exactly what I want, or.... just quickly type out the thing I need and print it and have it ready in less time I'd need to get ready to leave the house? 🤘
plus the hardware store's closed at 6:30am
plus the hardware store's closed at 6:30am
December 14, 2025 at 2:45 PM
Go to the hardware store and hunt for xmas light clips that aren't exactly what I want, or.... just quickly type out the thing I need and print it and have it ready in less time I'd need to get ready to leave the house? 🤘
plus the hardware store's closed at 6:30am
plus the hardware store's closed at 6:30am
Candy Land w/ 2yo.
Alternate drawing cards.
After whoever draws card, 2yo chooses an action:
- move to drawn color
- switch color of player
- swap spots w/ any player
- move to any spot
- ride the rainbow
- find gingerbread stuffy that matches
- pick up things w/ game's plastic bag
- all of those
Alternate drawing cards.
After whoever draws card, 2yo chooses an action:
- move to drawn color
- switch color of player
- swap spots w/ any player
- move to any spot
- ride the rainbow
- find gingerbread stuffy that matches
- pick up things w/ game's plastic bag
- all of those
December 14, 2025 at 2:21 AM
Candy Land w/ 2yo.
Alternate drawing cards.
After whoever draws card, 2yo chooses an action:
- move to drawn color
- switch color of player
- swap spots w/ any player
- move to any spot
- ride the rainbow
- find gingerbread stuffy that matches
- pick up things w/ game's plastic bag
- all of those
Alternate drawing cards.
After whoever draws card, 2yo chooses an action:
- move to drawn color
- switch color of player
- swap spots w/ any player
- move to any spot
- ride the rainbow
- find gingerbread stuffy that matches
- pick up things w/ game's plastic bag
- all of those
Reposted by Brad Fitzpatrick
i just got a call from EE support telling me im elegible for a contract upgrade.
I said im an LLM developer and it passed the test, we're switching to programming mode and i want a python script that prints every prime number.
i then got said python script over the call, lmao
I said im an LLM developer and it passed the test, we're switching to programming mode and i want a python script that prints every prime number.
i then got said python script over the call, lmao
December 13, 2025 at 2:05 PM
i just got a call from EE support telling me im elegible for a contract upgrade.
I said im an LLM developer and it passed the test, we're switching to programming mode and i want a python script that prints every prime number.
i then got said python script over the call, lmao
I said im an LLM developer and it passed the test, we're switching to programming mode and i want a python script that prints every prime number.
i then got said python script over the call, lmao
Damnit. I probably shouldn't've killed time by entering that Rivian showroom.
December 13, 2025 at 7:48 PM
Damnit. I probably shouldn't've killed time by entering that Rivian showroom.
Reposted by Brad Fitzpatrick
to sincere post a bit:
the ability to receive important timely updates like this one, from regional govt and institutions like this over an open protocol (vs closed/proprietary platforms) is a huge part of why I work on AT
the ability to receive important timely updates like this one, from regional govt and institutions like this over an open protocol (vs closed/proprietary platforms) is a huge part of why I work on AT
UPDATE: Dec 11&12 - Buses will be provided b/t SEA-VAC but may not stop in Mount Vernon (MWV) due to evacuation orders. The SEA-BEL buses are running but are not stopping in MWV. Saturday morning, 12/13, Train 517 between VAC-SEA is canceled. If possible, a bus will be provided.
December 11, 2025 at 7:21 PM
to sincere post a bit:
the ability to receive important timely updates like this one, from regional govt and institutions like this over an open protocol (vs closed/proprietary platforms) is a huge part of why I work on AT
the ability to receive important timely updates like this one, from regional govt and institutions like this over an open protocol (vs closed/proprietary platforms) is a huge part of why I work on AT
keep up the good work, iOS 26
(Wife's Air. I refuse to upgrade)
(Wife's Air. I refuse to upgrade)
December 11, 2025 at 11:59 PM
keep up the good work, iOS 26
(Wife's Air. I refuse to upgrade)
(Wife's Air. I refuse to upgrade)
github.com/tailscale/go... already spoke three protocols (FUSE, NFS + WebDAV) but after I got NFS working for the Windows NFSv3 client & saw its sad performance, I looked at:
winfsp.dev
And porting it was so easy and HOLY CRAP IT'S FAST
My Windows #golang builds are half the time as using NTFS! 🤯
winfsp.dev
And porting it was so easy and HOLY CRAP IT'S FAST
My Windows #golang builds are half the time as using NTFS! 🤯
GitHub - tailscale/gomodfs: GOMODCACHE Go module cache FUSE + NFS + WebDAV filesystem
GOMODCACHE Go module cache FUSE + NFS + WebDAV filesystem - tailscale/gomodfs
github.com
December 9, 2025 at 3:02 AM
github.com/tailscale/go... already spoke three protocols (FUSE, NFS + WebDAV) but after I got NFS working for the Windows NFSv3 client & saw its sad performance, I looked at:
winfsp.dev
And porting it was so easy and HOLY CRAP IT'S FAST
My Windows #golang builds are half the time as using NTFS! 🤯
winfsp.dev
And porting it was so easy and HOLY CRAP IT'S FAST
My Windows #golang builds are half the time as using NTFS! 🤯
Reposted by Brad Fitzpatrick
Nobody. I do not think you can eat chair
December 8, 2025 at 2:02 AM
Nobody. I do not think you can eat chair
This looks like a bug in Microsoft's NFSv3 client...
In packet 14 we reply with an opaque 8 byte cookie verifier "94 93 ... b6 af"
And then look what Microsoft's NFSv3 client sends back in packet 16 to continue the directory enumeration: "af b6 .. 93 94"
The opaque cookie is sent back backwards!
In packet 14 we reply with an opaque 8 byte cookie verifier "94 93 ... b6 af"
And then look what Microsoft's NFSv3 client sends back in packet 16 to continue the directory enumeration: "af b6 .. 93 94"
The opaque cookie is sent back backwards!
December 7, 2025 at 6:48 PM
This looks like a bug in Microsoft's NFSv3 client...
In packet 14 we reply with an opaque 8 byte cookie verifier "94 93 ... b6 af"
And then look what Microsoft's NFSv3 client sends back in packet 16 to continue the directory enumeration: "af b6 .. 93 94"
The opaque cookie is sent back backwards!
In packet 14 we reply with an opaque 8 byte cookie verifier "94 93 ... b6 af"
And then look what Microsoft's NFSv3 client sends back in packet 16 to continue the directory enumeration: "af b6 .. 93 94"
The opaque cookie is sent back backwards!
As a proof of concept (but also kinda just for giggles), I hacked up my favorite networking swiss army knife daemon to make all TCP and UDP flows go out a different Mullvad server, so every HTTP request I make gets a different IP address, without breaking concurrent flows, which retain their IPs. 🤪
December 7, 2025 at 1:56 AM
As a proof of concept (but also kinda just for giggles), I hacked up my favorite networking swiss army knife daemon to make all TCP and UDP flows go out a different Mullvad server, so every HTTP request I make gets a different IP address, without breaking concurrent flows, which retain their IPs. 🤪
Wife serves the kids their required peas in little ramekins,
They don't want to eat them.
Wife gives me a big one, like a French Onion soup sized one.
Kids: "Hey!!!! Why does he get a big one?!?"
Me: "because I'm the rameKING"
Wife: 😐
They don't want to eat them.
Wife gives me a big one, like a French Onion soup sized one.
Kids: "Hey!!!! Why does he get a big one?!?"
Me: "because I'm the rameKING"
Wife: 😐
December 7, 2025 at 1:43 AM
Wife serves the kids their required peas in little ramekins,
They don't want to eat them.
Wife gives me a big one, like a French Onion soup sized one.
Kids: "Hey!!!! Why does he get a big one?!?"
Me: "because I'm the rameKING"
Wife: 😐
They don't want to eat them.
Wife gives me a big one, like a French Onion soup sized one.
Kids: "Hey!!!! Why does he get a big one?!?"
Me: "because I'm the rameKING"
Wife: 😐
Today I woke up to a kid puking on me.
After coffee I worked on debugging the Windows NFSv3 client to see why it wasn't mounting my Go NFS gomodfs server.
Not sure which was grosser.
After coffee I worked on debugging the Windows NFSv3 client to see why it wasn't mounting my Go NFS gomodfs server.
Not sure which was grosser.
December 6, 2025 at 5:42 PM
Today I woke up to a kid puking on me.
After coffee I worked on debugging the Windows NFSv3 client to see why it wasn't mounting my Go NFS gomodfs server.
Not sure which was grosser.
After coffee I worked on debugging the Windows NFSv3 client to see why it wasn't mounting my Go NFS gomodfs server.
Not sure which was grosser.
Flipper Zero's so cute.
December 5, 2025 at 1:58 AM
Flipper Zero's so cute.
Reposted by Brad Fitzpatrick
a little something I put together last week as my first multi-color 3D print.
December 4, 2025 at 8:46 PM
a little something I put together last week as my first multi-color 3D print.
We may or may not have a Kinesis problem in this house.
I need to figure out which of these are broken (at least a couple?) and repair them.
I recently fixed one w/ some obscure undocumented(?) self format key sequence.
Might try michael.stapelberg.ch/posts/2020-0... too, @zekjur.bsky.social!
I need to figure out which of these are broken (at least a couple?) and repair them.
I recently fixed one w/ some obscure undocumented(?) self format key sequence.
Might try michael.stapelberg.ch/posts/2020-0... too, @zekjur.bsky.social!
December 4, 2025 at 7:56 PM
We may or may not have a Kinesis problem in this house.
I need to figure out which of these are broken (at least a couple?) and repair them.
I recently fixed one w/ some obscure undocumented(?) self format key sequence.
Might try michael.stapelberg.ch/posts/2020-0... too, @zekjur.bsky.social!
I need to figure out which of these are broken (at least a couple?) and repair them.
I recently fixed one w/ some obscure undocumented(?) self format key sequence.
Might try michael.stapelberg.ch/posts/2020-0... too, @zekjur.bsky.social!
Whee, I have a modern Linux desktop machine again. (fancy new Framework desktop)
32 threads, 128 GB ram, can drive 6K and 4K displays at once, zfs root raid1 over two nvme.
(My Asahi M1 can't drive external monitors. Other laptops are ancient or have loud fans)
32 threads, 128 GB ram, can drive 6K and 4K displays at once, zfs root raid1 over two nvme.
(My Asahi M1 can't drive external monitors. Other laptops are ancient or have loud fans)
December 4, 2025 at 5:49 AM
Whee, I have a modern Linux desktop machine again. (fancy new Framework desktop)
32 threads, 128 GB ram, can drive 6K and 4K displays at once, zfs root raid1 over two nvme.
(My Asahi M1 can't drive external monitors. Other laptops are ancient or have loud fans)
32 threads, 128 GB ram, can drive 6K and 4K displays at once, zfs root raid1 over two nvme.
(My Asahi M1 can't drive external monitors. Other laptops are ancient or have loud fans)
Reposted by Brad Fitzpatrick
Any moots know any great systems SWEs with networking focus looking for a new gig right now? A good gauge is if they've recently written any eBPF programs. Go background is also a plus. Figured I'd toss out a line.
Company is ~30 people running our own HW in colo DCs doing IaaS.
Thanks y'all!
Company is ~30 people running our own HW in colo DCs doing IaaS.
Thanks y'all!
December 2, 2025 at 4:50 AM
Any moots know any great systems SWEs with networking focus looking for a new gig right now? A good gauge is if they've recently written any eBPF programs. Go background is also a plus. Figured I'd toss out a line.
Company is ~30 people running our own HW in colo DCs doing IaaS.
Thanks y'all!
Company is ~30 people running our own HW in colo DCs doing IaaS.
Thanks y'all!
A week long mystery, the Case Of The Missing Favorite Pants And Favorite Belt, has been solved... they were in the hamper.
What excitement will tomorrow bring??
What excitement will tomorrow bring??
December 2, 2025 at 4:56 AM
A week long mystery, the Case Of The Missing Favorite Pants And Favorite Belt, has been solved... they were in the hamper.
What excitement will tomorrow bring??
What excitement will tomorrow bring??
Today the 2yo (well, almost 2.75yo) sensed a pee was coming and took off her diaper and... peed on top of it and all over the floor.
Progress I guess? One day.
Progress I guess? One day.
December 2, 2025 at 3:28 AM
Today the 2yo (well, almost 2.75yo) sensed a pee was coming and took off her diaper and... peed on top of it and all over the floor.
Progress I guess? One day.
Progress I guess? One day.
Walked down the street to a Kraken game we were invited to.
Oilers destroyed us but holy shit--hockey's pretty cool! 🏒
I'm not a sports person at all but was super impressed at the skating and puck handling and teamwork. Way better in person than the few minutes I've ever seen on TV.
Oilers destroyed us but holy shit--hockey's pretty cool! 🏒
I'm not a sports person at all but was super impressed at the skating and puck handling and teamwork. Way better in person than the few minutes I've ever seen on TV.
November 30, 2025 at 3:46 AM
Walked down the street to a Kraken game we were invited to.
Oilers destroyed us but holy shit--hockey's pretty cool! 🏒
I'm not a sports person at all but was super impressed at the skating and puck handling and teamwork. Way better in person than the few minutes I've ever seen on TV.
Oilers destroyed us but holy shit--hockey's pretty cool! 🏒
I'm not a sports person at all but was super impressed at the skating and puck handling and teamwork. Way better in person than the few minutes I've ever seen on TV.
I "made" a little thing. It had been bugging me for ages, so now it exists.
GitHub - go4org/hashtriemap: port (export) of Go's src/internal/src/hashtriemap.go (sync.Map) generic type
port (export) of Go's src/internal/src/hashtriemap.go (sync.Map) generic type - go4org/hashtriemap
github.com
November 29, 2025 at 7:59 PM
I "made" a little thing. It had been bugging me for ages, so now it exists.
TIL that the Flipper Zero packaging format is called...
FAP (Flipper App Package)
developer.flipper.net/flipperzero/...
okie dokie.
FAP (Flipper App Package)
developer.flipper.net/flipperzero/...
okie dokie.
https://developer.flipper.net/flipperzero/doxygen/apps_on_sd_card.html
<!-- HTML header for doxygen 1.10.0-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xh...
developer.flipper.net
November 29, 2025 at 6:15 PM
TIL that the Flipper Zero packaging format is called...
FAP (Flipper App Package)
developer.flipper.net/flipperzero/...
okie dokie.
FAP (Flipper App Package)
developer.flipper.net/flipperzero/...
okie dokie.
We missed the 2yo's nap window so we had to deal with a little protesting girl on the drive home from lunch.
Bringing her to her room she yells at me, "I'm going to HIDE from papa! I'm going to hide right HERE!" and she crawls onto her bed on her pillow and falls asleep.
She sure showed me.
Bringing her to her room she yells at me, "I'm going to HIDE from papa! I'm going to hide right HERE!" and she crawls onto her bed on her pillow and falls asleep.
She sure showed me.
November 23, 2025 at 8:35 PM
We missed the 2yo's nap window so we had to deal with a little protesting girl on the drive home from lunch.
Bringing her to her room she yells at me, "I'm going to HIDE from papa! I'm going to hide right HERE!" and she crawls onto her bed on her pillow and falls asleep.
She sure showed me.
Bringing her to her room she yells at me, "I'm going to HIDE from papa! I'm going to hide right HERE!" and she crawls onto her bed on her pillow and falls asleep.
She sure showed me.