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<p class="MsoNormal"><span style="color:#1F497D">Hi Yong,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Before testing it, I diff the changes you made and have the following feedbacks:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In nvmestd.c:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo5"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">In NVMeFindAdapter, pBuff is not used and can be removed.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo5"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">In Line#1268, if the request had been completed in BuildIo, will it ever come to the codes you added?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo5"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">In RecoveryDpcRoutine, why you need to call NVMeEnumMsiMessages? NVMeEnumMsiMessages always returns TRUE and it won’t fall into the FALSE case.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo5"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">You replaced #if DBG with #if 0, could you please put it back? In nvmesnti.c as well.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In nvmestat.c:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> You call KeStallExecutionProcessor with number of microseconds in multiple of 100, why 100? Can we #define it in header file instead of hard-coding it? One of the coding principles is avoiding the hard-coded
numbers except 0 and 1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">In nvmeinit.c (NVMeAllocateMem function):<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l3 level1 lfo6"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">When dumpbuffer is used up, Status is 0 and pBuf is NULL. In that case, it doesn’t return immediately, instead it will proceed and call StorPortAllocateContiguousMemorySpecifyCacheNode, etc.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l3 level1 lfo6"><![if !supportLists]><span style="color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">What will happen if dumpbuffer is used up? You request 5*64K for it and is there any reasons you pick the number?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thank you for your effort!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Alex<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yong Chen [mailto:Yong.sc.Chen@huawei.com]
<br>
<b>Sent:</b> Friday, November 22, 2013 1:48 PM<br>
<b>To:</b> Alex Chang; nvmewin@lists.openfabrics.org<br>
<b>Subject:</b> RE: [nvmewin] code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi, everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I hope many are busy testing the changes on your devices. If you have any feedback to share, I’d very appreciate it. Holiday is upon us and we’d like to wrap up this much delayed soon.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Yong<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yong Chen
<br>
<b>Sent:</b> Wednesday, November 20, 2013 12:52 AM<br>
<b>To:</b> 'Alex Chang'; Uma Parepalli<br>
<b>Cc:</b> 'nvmewin@lists.openfabrics.org'<br>
<b>Subject:</b> RE: [nvmewin] code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Object #1: crash dump when blue screen or manual triggered, for all SKUs (server or client).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Object #2: hibernate and then resume on all client SKUs.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">+ Minor cleaning up and fixes along the way.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">High-level Summary:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The major change is to enable ntldrDump mode so that during crash dump or hibernation, the system memory can be dumped to pre-allocated block locations (MEMORY.DMP or HIBERFIL.SYS file). The same nvme.sys driver
will be reloaded as another image into strict dumbed-down environment where usual APIs are not available anymore.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The next challenge is to re-initialize the controller properly after having resumed from hibernation image and to continue serve as system boot disk.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I need to give credits to earlier contributors (Intel, LSI, IDT and others) for having laid solid building blocks needed for the dump mode. This change solved the buffer issue and introduced a different code
path for IOs in dump mode.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Detailed Briefs:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">nvmeInit.c<br>
changes to manage buffers and IO queues in dump modes.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">nvmeIo.c<br>
minor tweak in dump mode where only boot-CPU is available<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">nvmeSnti.c<br>
fix existing bug where FLUSH cmd should include NSID (all NSs in this case).<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">nvmeStat.c<br>
helper function change due to some timer related API not available in dump mode.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol;color:#1F497D"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="color:#1F497D">nvmeStd.c<br>
A: refactored code into NVMeWaitForCtrlRDY() for waiting after setting CC.EN = 1.<br>
B: introduced same waiting logic after clearing CC.EN = 0.<br>
C: during power up, Reset will issue DPC to call RecoveryDpcRoutine() to re-initialize the driver, similarly the above A+B steps are introduced.
<br>
<br>
Using trunk version code, the hardware I have always timed out on initialization. I have had this fix since this spring. I think it is the same issue listed in Kwok’s laundry list. But I would need Judy to verify whether the issue she found is fixed or not
by this change.<br>
(</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Not handling CSTS.RDY status (from 1->0 and 0->1) properly on NVMe reset.</span><span style="color:#1F497D">)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Alex Chang [<a href="mailto:Alex.Chang@pmcs.com">mailto:Alex.Chang@pmcs.com</a>]
<br>
<b>Sent:</b> Tuesday, November 19, 2013 5:04 PM<br>
<b>To:</b> Uma Parepalli; Yong Chen<br>
<b>Subject:</b> RE: [nvmewin] code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi Yong,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Could you please summarize the changes you made? Normally, we list the changes under each file as high-level briefs.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<br>
Alex<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Uma Parepalli [<a href="mailto:uma.parepalli@skhms.com">mailto:uma.parepalli@skhms.com</a>]
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<b>Sent:</b> Tuesday, November 19, 2013 4:05 PM<br>
<b>To:</b> Alex Chang<br>
<b>Subject:</b> RE: [nvmewin] code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Is there a change log file or something that explains what changes are made without looking at the code?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Uma<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a href="mailto:nvmewin-bounces@lists.openfabrics.org">nvmewin-bounces@lists.openfabrics.org</a> [<a href="mailto:nvmewin-bounces@lists.openfabrics.org">mailto:nvmewin-bounces@lists.openfabrics.org</a>]
<b>On Behalf Of </b>Alex Chang<br>
<b>Sent:</b> Tuesday, November 19, 2013 4:05 PM<br>
<b>To:</b> <a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a><br>
<b>Subject:</b> Re: [nvmewin] code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Please find the attached code changes made by Yong Chen from Huawei. Please review the changes, test them accordingly and provide your feedbacks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<br>
Alex<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yong Chen [<a href="mailto:Yong.sc.Chen@huawei.com">mailto:Yong.sc.Chen@huawei.com</a>]
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<b>Sent:</b> Tuesday, November 19, 2013 3:59 PM<br>
<b>To:</b> <a href="mailto:nvmewin@lists.openfabrics.org">nvmewin@lists.openfabrics.org</a>; Alex Chang<br>
<b>Subject:</b> RE: code review: crash dump & hibernation support<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:#1F497D"><Resending to due to attachment issue><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hi, all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Please download the source code from the link in the attached email (you need to have Silverlight installed).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Or to save the trouble for everyone,… Alex, Could you reply back with the code change you downloaded. Testlog is attached and see below for the list of tests.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Yong<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yong Chen
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<b>Sent:</b> Monday, November 18, 2013 4:13 PM<br>
<b>To:</b> 'nvmewin@lists.openfabrics.org'; 'Alex Chang'</span><o:p></o:p></p>
<p class="MsoNormal">Hi, Alex and all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is the code change to support crash dump and hibernation. Please review. Hopefully we can wrap up by this week before the meeting.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Using the trunk version I had problem with the initialization as well. The trunk version would timeout on me. I think it is the same
<span style="font-size:10.0pt;font-family:"Arial","sans-serif"">CSTS.RDY</span> issue Judy raised up. I refactored a bit and fixed it at least for the hardware I have.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Yong<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tests that I have gone thru:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>manual crash dump.<br>
KD>.crash and then reboot and KD -z -v MEMORY.DMP, do “!process -1 f”<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>manual hibernation or pwrtest /sleep /c:10 /d:30 /p:30 /s:4<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>SCSICompliance (log attached).<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>stresses: iostress, sdstress (log attached)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>hibernation has been tested on win8.0 as well, but not extensively.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">6.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Hibernation has also been tested with both bootable OptionROM or the newly released UEFI driver.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l1 level1 lfo4"><![if !supportLists]><span style="mso-list:Ignore">7.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>All tests were conducted on x64 platform, involving 3 different hardware, plus another Intel MB which can’t do hibernation (no S4).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:STXihei;color:black">Yong Chen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:STXihei;color:black">Storage Architect<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="ZH-CN" style="font-size:10.0pt;font-family:SimSun;color:black">华为技术有限公司</span><span style="font-size:10.0pt;font-family:STXihei;color:black"> Huawei Technologies Co., Ltd<o:p></o:p></span></p>
<p class="MsoNormal"><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f">
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</v:shape><![endif]--><![if !vml]><img width="102" height="32" src="cid:image002.jpg@01CEF018.30D6ADE0" align="left" alt="Company_logo" v:shapes="ridImg"><![endif]><span style="font-size:10.0pt;font-family:STXihei;color:black">Office:
408-330-5482<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Cambria","serif";color:black">Mobile: 425-922-0658</span><span style="font-size:10.0pt;font-family:STXihei;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Email: <a href="mailto:yong.sc.chen@huawei.com">
yong.sc.chen@huawei.com</a><br>
2330 Central Expressway<br>
Santa Clara, CA 95050<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><a href="http://www.huawei.com">http://www.huawei.com</a><o:p></o:p></span></p>
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