Re: [PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on v4.16-rc4] [also build test ERROR on next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url:

Re: [PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on v4.16-rc4] [also build test ERROR on next-20180316] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url:

[PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

Resent to address reviewer comments. Currently, the VDSO does not handle clock_gettime( CLOCK_MONOTONIC_RAW, ) on Intel / AMD - it calls vdso_fallback_gettime() for this clock, which issues a syscall, having an unacceptably high latency (minimum measurable time or time between

[PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

Resent to address reviewer comments. Currently, the VDSO does not handle clock_gettime( CLOCK_MONOTONIC_RAW, ) on Intel / AMD - it calls vdso_fallback_gettime() for this clock, which issues a syscall, having an unacceptably high latency (minimum measurable time or time between

[PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index f19856d..8b9b9cf 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -182,27 +182,49 @@ notrace static u64 vread_tsc(void) return last; } -notrace

[PATCH v4.16-rc5 1/1] x86/vdso: VDSO should handle clock_gettime(CLOCK_MONOTONIC_RAW) without syscall

diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index f19856d..8b9b9cf 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c @@ -182,27 +182,49 @@ notrace static u64 vread_tsc(void) return last; } -notrace