Re: [PATCH] drivers/rxe: improve rxe loopback

On Wed, Jul 26, 2017 at 10:57 PM, Yuval Shaia wrote: > On Wed, Jul 26, 2017 at 05:52:48PM +0300, Marcel Apfelbaum wrote: >> Currently a packet is marked for loopback only if the source and >> destination address match. This is not enough when multiple >> gids are present in rxe's gid table and the

Re: Doubled "opcode != 0x9a" check

On Wed, 26 Jul 2017 21:55:34 +0200 Denys Vlasenko wrote: > commit bd0b90676c30fe640e7ead919b3e38846ac88ab7 > Author: Masami Hiramatsu > Date: Wed Mar 29 13:56:56 2017 +0900 > > kprobes/x86: Fix kprobe-booster not to boost far call instructions > > Fix the kprobe-booster not to boost

[PATCH -tip v4] [BUGFIX] kprobes/x86: Do not jump-optimize kprobes on irq entry code

Since the kernel segment registers are not prepared at the entry of irq-entry code, if a kprobe on such code is jump-optimized, accessing per-cpu variables may cause kernel panic. However, if the kprobe is not optimized, it kicks int3 exception and set segment registers correctly. This checks prob

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