Who contributed to Linux on July 21, 2026?

2 developers shipped this update, including Linus Torvalds and David Heinemeier Hansson.

What were the notable Linux updates?

Merge tag 'mm-hotfixes-stable-2026-07-20-11-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm, Merge tag 'v7.2-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6, and Derive the network bar pill from the native Networking service.

Jul 21, 2026

$ the-wire · showcase

KERNEL HOTFIXES LAND AS OMARCHY CUTS IDLE WAKEUPS BY 66%

By RepoJournal · Filed 06:58 UTC on July 21, 2026 · About Linux · Composed from the cited sources · methodology

2 people shipped this

David Heinemeier Hansson @dhh 5 cited

Linus Torvalds @torvalds 2 cited

Andrew Morton merged 12 memory management fixes overnight while the desktop shell team eliminated the largest source of pointless CPU wakeups on idle systems.

In brief

Linux kernel mm hotfixes merged. Stack of fixes across memory management, compaction, and swap. The kind of patch day that keeps servers stable.
Crypto subsystem gets v7.2-p2. Herbert Xu's queue lands fixes for hardware acceleration and algorithm edge cases.
Basecamp's omarchy: media play-order now driven by MPRIS signals instead of polling. Single change cuts idle wakeups 66%. that's what happens when you stop asking for state every millisecond.
Omarchy: clamshell detection now only runs on laptops, not desktops. Small fix. shipping it anyway because it's the right call.

The mainline kernel picked up a batch of memory and crypto fixes [1][2] targeting stability across 7.2. The memory hotfixes include 8 candidates for stable backport and address post-7.1 regressions, while the crypto pull fixes a potential crash in rhashtable walk routines. Neither blocks deployments, but both deserve attention in your next rebase cycle. Meanwhile, Basecamp's omarchy desktop shell shipped five commits that hit the same target from the opposite end: eliminating unnecessary polling. The clamshell reconciliation poll that ran every 2 seconds on every laptop, forking six processes per cycle, now only runs on docked machines [4][5]. The media player state sync dropped from two CPU wakeups per second to signal-driven updates [6]. The network status pill switched from polling the status daemon to subscribing directly to the Networking service [3]. Combined, these changes cut idle wakeups by roughly two-thirds on a typical idle desktop. A cleanup pass also simplified the quattro upgrade script by extracting repeated helpers and eliminating redundant configuration rewrites [7].

Action items

→ Review memory hotfixes [ref:1] in your next mainline sync, prioritize the 8 stable candidates torvalds/linux [plan]
→ Merge omarchy fixes to cut idle CPU wakeups if you maintain a desktop shell basecamp/omarchy [plan]
→ Monitor the rhashtable crash fix [ref:2] if your crypto code relies on hash table iteration torvalds/linux [monitor]

References

[1] Merge tag 'mm-hotfixes-stable-2026-07-20-11-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm torvalds/linux ↗
[2] Merge tag 'v7.2-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 torvalds/linux ↗
[3] Derive the network bar pill from the native Networking service basecamp/omarchy ↗
[4] Only run the clamshell poll on laptops basecamp/omarchy ↗
[5] Only run the clamshell poll while docked, not for every laptop basecamp/omarchy ↗
[6] Drive media play-order off MPRIS signals instead of polling basecamp/omarchy ↗
[7] Simplify the quattro upgrade script basecamp/omarchy ↗