Messages in this thread | | | Subject | Re: [GIT pull] x86/pti: The real thing | From | François Valenduc <> | Date | Sun, 31 Dec 2017 09:40:46 +0100 |
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Le 30/12/17 à 10:04, Mike Galbraith a écrit : > On Fri, 2017-12-29 at 17:42 -0800, Linus Torvalds wrote: >> On Thu, Dec 28, 2017 at 12:34 PM, Thomas Gleixner <tglx@linutronix.de> wrote: >>> >>> please pull the latest x86-pti-for-linus git tree from: >>> >>> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-pti-for-linus >>> >>> This is the final set of enabling page table isolation on x86: >> >> Ok, after that late MCORE2 scare that held things up, this is now >> merged in my tree and pushed out. "WorksForMe(tm)". > > But it definitely ain't free. NFS hanging out in the kernel for 82ms > at a whack may not be such a bad idea after all ;-) > > i4790+tbench > > CONFIG_PAGE_TABLE_ISOLATION=y > Throughput 3467.72 MB/sec 8 clients 8 procs max_latency=3.499 ms > > CONFIG_PAGE_TABLE_ISOLATION=n > Throughput 3700.81 MB/sec 8 clients 8 procs max_latency=4.893 ms > > CONFIG_PAGE_TABLE_ISOLATION=y CONFIG_PAGE_TABLE_ISOLATION=n > 4.48% [k] syscall_return_via_sysret 3.56% [k] copy_user_enhanced_fast_string > 3.41% [k] copy_user_enhanced_fast_string 2.54% [.] child_run > 2.48% [.] child_run 1.76% [k] tcp_transmit_skb > 1.64% [.] __strchr_sse2 1.74% [k] tcp_recvmsg > 1.60% [k] tcp_transmit_skb 1.69% [.] __strchr_sse2 > 1.55% [k] tcp_recvmsg 1.56% [.] __GI_____strtoll_l_internal > 1.46% [k] ipt_do_table 1.44% [k] ipt_do_table > 1.45% [.] __GI_____strtoll_l_internal 1.42% [k] tcp_sendmsg_locked > 1.25% [k] tcp_in_window 1.34% [k] tcp_write_xmit > 1.21% [.] next_token 1.34% [k] tcp_clean_rtx_queue > 1.17% [k] tcp_clean_rtx_queue 1.26% [.] next_token > 1.16% [k] tcp_sendmsg_locked 1.24% [k] tcp_in_window > 1.15% [k] __switch_to 1.19% [k] nf_conntrack_in > 1.10% [k] switch_mm_irqs_off 1.17% [k] __switch_to > 1.09% [k] tcp_write_xmit 1.13% [.] __strcasecmp_l_avx > 1.09% [k] tcp_ack 1.10% [k] switch_mm_irqs_off > 1.08% [k] nf_hook_slow 1.08% [k] tcp_v4_rcv > 1.04% [k] __sched_text_start 1.06% [k] nf_hook_slow > 0.99% [.] __strcasecmp_l_avx 1.05% [k] tcp_ack >
The KConfig text refers to Documentation/x86/pagetable-isolation.txt, which doesn't exists...
François Valenduc
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