Hi, Not so usual to be switching rc kernels for guix I suppose, but this looked worth mentioning anyway:
LWN archive link [1] [1]https://lwn.net/ml/linux-kernel/CAHk-=wjnzdlsp3odxhf9emtyo7gf-qjanlbuh1zk3c4a7x7...@mail.gmail.com/ In case of link problem, a couple of extractions: --8<---------------cut here---------------start------------->8--- From: Linus Torvalds <torvalds-AT-linux-foundation.org> To: Linux Kernel Mailing List <linux-kernel-AT-vger.kernel.org> Subject: A note on the 5.12-rc1 tag Date: Wed, 03 Mar 2021 12:53:18 -0800 Message-ID: <CAHk-=wjnzdlsp3odxhf9emtyo7gf-qjanlbuh1zk3c4a7x7...@mail.gmail.com> Hey peeps - some of you may have already noticed that in my public git tree, the "v5.12-rc1" tag has magically been renamed to "v5.12-rc1-dontuse". It's still the same object, it still says "v5.12-rc1" internally, and it is still is signed by me, but the user-visible name of the tag has changed. The reason is fairly straightforward: this merge window, we had a very innocuous code cleanup and simplification that raised no red flags at all, but had a subtle and very nasty bug in it: swap files stopped working right. And they stopped working in a particularly bad way: the offset of the start of the swap file was lost. Swapping still happened, but it happened to the wrong part of the filesystem, with the obvious catastrophic end results. [ -- snip discussion why all will not be hit -- ] But I want everybody to be aware of because _if_ it bites you, it bites you hard, and you can end up with a filesystem that is essentially overwritten by random swap data. This is what we in the industry call "double ungood". --8<---------------cut here---------------end--------------->8--- -- Regards, Bengt Richter