Re: [PATCH 0/5] remove tlb_remove_page_ptdesc()

2025-02-07 Thread Matthew Wilcox
On Fri, Jan 24, 2025 at 12:47:59PM +0100, Peter Zijlstra wrote: > Right, so I don't think Sparc and Power care to use ptdesc, they're > using non page page-tables. i think you mean s390, not sparc. all architectures _use_ ptdescs, it's just that s390 and ppc use fractional ptdescs rather than an

UML binary encounters "Segmentation fault" when enabling CONFIG_GCOV_PROFILE_ALL

2025-02-07 Thread Mingrui Zhang
Hi, I'm encountering a segmentation fault when running a UML kernel compiled with GCOV profiling enabled. My steps: 1. Create .config using make ARCH=um defconfig and config the following flags: CONFIG_GCOV_KERNEL=y CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y CONFIG_GCOV_PROFILE_ALL=y 2. Compile to UML