Re: [PATCH 00/13] Prepare for PTRACE_GET_SYSCALL_INFO

On Thu, Nov 8, 2018 at 7:13 PM Dmitry V. Levin wrote: > > syscall_get_arch() is required to be implemented on all architectures > that use tracehook_report_syscall_entry() in order to extend > the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Nice! I'm pretty sure you have vastly more

[PATCH 06/13] arc: define syscall_get_arch()

syscall_get_arch() is required to be implemented on all architectures that use tracehook_report_syscall_entry() in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Signed-off-by: Dmitry V. Levin --- arch/arc/include/asm/syscall.h | 6 ++ include/uapi/linux/audit.h

[PATCH 02/13] elf-em.h: add EM_ARC

The uapi/linux/audit.h header is going to use EM_ARC in order to define AUDIT_ARCH_ARC which is needed to implement syscall_get_arch() which in turn is required to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. The value for EM_ARC has been taken from http://www.sco.com/develo

[PATCH 00/13] Prepare for PTRACE_GET_SYSCALL_INFO

syscall_get_arch() is required to be implemented on all architectures that use tracehook_report_syscall_entry() in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request. Dmitry V. Levin (13): Move EM_HEXAGON to uapi/linux/elf-em.h elf-em.h: add EM_ARC elf-em.h: add EM_N

[PATCH -next-akpm 3/3] mm: select HAVE_MOVE_PMD in x86 for faster mremap

From: "Joel Fernandes (Google)" Moving page-tables at the PMD-level on x86 is known to be safe. Enable this option so that we can do fast mremap when possible. Suggested-by: Kirill A. Shutemov Acked-by: Kirill A. Shutemov Signed-off-by: Joel Fernandes (Google) --- arch/x86/Kconfig | 1 + 1 f

[PATCH -next-akpm 1/3] mm: treewide: remove unused address argument from pte_alloc functions (v2)

From: "Joel Fernandes (Google)" This series speeds up mremap(2) syscall by copying page tables at the PMD level even for non-THP systems. There is concern that the extra 'address' argument that mremap passes to pte_alloc may do something subtle architecture related in the future that may make the

[PATCH -next-akpm 2/3] mm: speed up mremap by 20x on large regions (v5)

From: "Joel Fernandes (Google)" Android needs to mremap large regions of memory during memory management related operations. The mremap system call can be really slow if THP is not enabled. The bottleneck is move_page_tables, which is copying each pte at a time, and can be really slow across a la

[PATCH -next-akpm 0/3] Add support for fast mremap

Hi, Here is the "fast mremap" series. This just a repost with Kirill's Acked-bys added and William's Reviewed-by added. Also fixed a UML build error reported last week. I would like this to be considered for linux -next. The performance numbers in the series are for testing on x86. The config enabl