From owner-freebsd-hackers@freebsd.org Thu Feb 21 16:18:00 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 613FE14E682B for ; Thu, 21 Feb 2019 16:18:00 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-qt1-x82b.google.com (mail-qt1-x82b.google.com [IPv6:2607:f8b0:4864:20::82b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 68EDC81877 for ; Thu, 21 Feb 2019 16:17:59 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-qt1-x82b.google.com with SMTP id p48so32138085qtk.2 for ; Thu, 21 Feb 2019 08:17:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=jpq9Km8W2Bikxwk2iq3Mky4mwqLdlAXbTZvlXDK20zE=; b=NEJwHcLkqGqPiigDmeRZrioi+NYyQXMduNN751M7gGGsIbexSQysQpHOaKiQE/5NY7 IKf0Ed5/UFPywEFTFQrS3V5jcmMp8GLYP3P7H5pqdlUf8FVUpRU+j15KItJcd2LtWE2+ c9wqbsOWJemU6kUjE6yYSHlWigORHdD6LCx7RRhtInJsPEgId34gEJ54LUE2lMBaoXWx P8cRNUutha26zRkaS+1fovtSCwHfY3Vh1fD9PezRzRxWUuPFDa9uNbWPbZK/R2GTaqF5 mUuyuRfNgqbgddrQ7/970yKUdrRT9yLwdTFQrnWmKE7x2MwM+2kld4DerFPlCHkscVMh 2jEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=jpq9Km8W2Bikxwk2iq3Mky4mwqLdlAXbTZvlXDK20zE=; b=l2CLrzBpqI2M05U/mDCZA9FhFTEx3yfOeghWCQysXtJG3b8hAwV19oOU+ArXvU1/zu ++m+IX4TSqcm3o0XaUQI8cGZES2dXEdxRMXHLCCmlHijOwOoXueM7Q8zVg7qhk9FVRpw 8KLszRXyXMPNIczlRTVQW+Isv+AZ7pG8/umJOnhIFkhHXHGyQLptVaFdUZ9pOZVzVfle iA7fePmPFW3hKR+pcXSEngpRuOtulJdXz6E/5vJleeWamQLmfc0LDfUsz+Fib8TNtP2a zMdhz/+rA5+D1thDWcoYzHXCGBH55VuuqAAgsuRQxEGLzZ0yqwmYGbqXGN9szLg4NY16 C9Kw== X-Gm-Message-State: AHQUAualtuVgmf09cjvWMuGMdZmBLPfaMxSOs+WVVUBRpZcQvqhI5DuY hR7giUbqQwKkS3yCpWuu75XqvJKrNL5SrCZJXMoXg5rX X-Google-Smtp-Source: AHgI3IbQuft7vrIqy4DmAAVLoslo0cbue+SsYDEtd1BxfffXLfaJIo3KM+xFx9ew9jpk0RL/NZ0y/Rkoor2xwjHd8Eg= X-Received: by 2002:a0c:b68a:: with SMTP id u10mr30139127qvd.57.1550765878839; Thu, 21 Feb 2019 08:17:58 -0800 (PST) MIME-Version: 1.0 References: <8a139c9c-b98b-4a54-1d7c-0ea1e3dc7a72@freebsd.org> <53a0bd68-a6ba-e8ad-4af2-abeb22e92c03@FreeBSD.org> In-Reply-To: From: Warner Losh Date: Thu, 21 Feb 2019 09:17:48 -0700 Message-ID: Subject: Re: Amazon AMIs To: Matthew Seaman Cc: Jonathan Anderson , Alex Dupre , "freebsd-hackers@freebsd.org" , Colin Percival X-Rspamd-Queue-Id: 68EDC81877 X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=bsdimp-com.20150623.gappssmtp.com header.s=20150623 header.b=NEJwHcLk X-Spamd-Result: default: False [-5.70 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; R_DKIM_ALLOW(-0.20)[bsdimp-com.20150623.gappssmtp.com:s=20150623]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[bsdimp.com]; RCPT_COUNT_FIVE(0.00)[5]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[bsdimp-com.20150623.gappssmtp.com:+]; MX_GOOD(-0.01)[cached: ALT1.aspmx.l.google.com]; RCVD_IN_DNSWL_NONE(0.00)[b.2.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.93)[-0.935,0]; R_SPF_NA(0.00)[]; FORGED_SENDER(0.30)[imp@bsdimp.com,wlosh@bsdimp.com]; MIME_TRACE(0.00)[0:+,1:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[imp@bsdimp.com,wlosh@bsdimp.com]; IP_SCORE(-2.75)[ip: (-9.10), ipnet: 2607:f8b0::/32(-2.61), asn: 15169(-1.99), country: US(-0.07)]; RCVD_COUNT_TWO(0.00)[2] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Feb 2019 16:18:00 -0000 On Thu, Feb 21, 2019 at 1:02 AM Matthew Seaman wrote: > On 20/02/2019 22:32, Jonathan Anderson wrote: > > On 20 Feb 2019, at 18:50, Alex Dupre wrote: > > > >> Colin Percival wrote: > >>> Last time I looked at this, we weren't handling hotplug/hotunplug of > >>> "NVMe" > >>> disks properly on the m5/c5/etc. instances. I opted to recommend the > >>> instance > >>> which completely works rather than the one with slightly better > >>> performance... > >> > >> It does happen only on a few instances, but I get some freezes on new t3 > >> machines: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235856 > >> > >> They are indeed cheaper and more performant, but not 100% reliable in > >> every workload. > > > > https://www.xkcd.com/937 ? > > > > Yes, indeed. That's a very good reason not to recommend the newest and > shiniest. I haven't seen any problems so far, but then again it's only > been a day or so and we haven't got into the full testing regime quite > yet. I'll let you know if we do run into problems. > > Is there work on hot-plug NVMe going on? ISTR jmg@ mentioning hotplug > PCI at the dev summit at Stockholm EuroBSDCon, but not much since then. > It's hot-unplug that doesn't work quite right. Hotplug works, I believe, if you have PCI_HP in your kernel, I believe. What's needed is about a solid week of cleanup and testing in this area, however. Warner