Re: [PATCH 1/3] rwsem: Remove the list_head from struct rw_semaphore

[Mark Brown]

On Wed, Mar 18, 2026 at 09:28:51PM +0100, Peter Zijlstra wrote:
> On Wed, Mar 18, 2026 at 07:07:24PM +0000, Mark Brown wrote:
> > On Thu, Mar 05, 2026 at 07:55:41PM +0000, Matthew Wilcox (Oracle) wrote:

> > In the past few days we've started seeing lockups when running LTP on
> > -next on a range of arm64 platforms which bisect to this patch.  It
> > looks like corruption of some kind, the exact trigger varies but it's
> > very predictable that something goes wrong and we get lots of rwsem
> > related backtraces which do seem relevant to this commmit.  This one
> > seems reasonably typical:

> I merged the fix in todays branch:

>   https://lkml.kernel.org/r/177382097549.1647592.8219974128268935080.tip-bot2@tip-bot2

Ah, excellent timing :/ - I'll let you know if there are still issues
going forwards.

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