Date: Tue, 14 Sep 2021 15:36:49 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Guido Falsi <mad@madpilot.net> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: recent head having significantly less "avail memory" Message-ID: <YUCXYUs7%2B5q3VPy8@kib.kiev.ua> In-Reply-To: <ebd854fc-8960-bb3f-e1b7-a7154203a315@madpilot.net> References: <4c990632-868a-2393-291b-fe7e2bc1974f@madpilot.net> <YT%2BFiWtUKZuZIbIb@kib.kiev.ua> <9e40483c-29e0-303a-eaa4-86d294403868@madpilot.net> <YT/M0aLEi32sTzM2@kib.kiev.ua> <ebd854fc-8960-bb3f-e1b7-a7154203a315@madpilot.net>
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On Tue, Sep 14, 2021 at 12:25:55AM +0200, Guido Falsi wrote: > On 14/09/21 00:12, Konstantin Belousov wrote: > > On Mon, Sep 13, 2021 at 10:07:46PM +0200, Guido Falsi wrote: > > > On 13/09/21 19:08, Konstantin Belousov wrote: > > > > On Mon, Sep 13, 2021 at 02:59:25PM +0200, Guido Falsi via freebsd-current wrote: > > > > > Hi, > > > > > > > > > > I updated head recently and today I noticed a difference which looks wrong. > > > > > > > > > > At boodt the new head shows signifcantly less avail memory than before, > > > > > around 3 GiB less. > > > > > > > > > > I moved from commit 71fbc6faed6 [1] where I got: > > > > > > > > > > Aug 28 22:03:03 marvin kernel: real memory = 17179869184 (16384 MB) > > > > > Aug 28 22:03:03 marvin kernel: avail memory = 16590352384 (15821 MB) > > > > > > > > > > to commit 7955efd574b [2] where I get: > > > > > > > > > > Sep 13 10:44:40 marvin kernel: real memory = 17179869184 (16384 MB) > > > > > Sep 13 10:44:40 marvin kernel: avail memory = 13298876416 (12682 MB) > > > > > > > > > > I'm seeing this on multiple machines. > > > > > > > > > > Unluckily bisecting and trying an older loader.efi in sseparate tests did > > > > > not give me any more insight. > > > > > > > > > > The recent changes to efi loader, starting with commit 6032b6ba9596 [3] look > > > > > like a possible trigger to this, but I have been unable to confirm it. > > > > > > > > > > Any suggesstions on how to proceed to debug thiss? ANy idea what a fix could > > > > > be? > > > > > > > > Is this UEFI or bios boot? > > > > Provide verbose dmesg for old and new boots on the same machine. > > > > For UEFI boot, show output of 'sysctl machdep.efi_map', again for old > > > > and new boots. > > > > > > > > > > I shared the data you request here: > > > > > > https://www.madpilot.net/cloud/s/ENW5zF7jfmrmFeG > > > > Thanks. > > > > If you do on the loader prompt for the new (AKA bad) kernel > > copy_staging enable > > and then boot, does the report of avail memory becomes good? > > > > Yes, it works as expected, that is reports the amount of memory I expect: > > Sep 14 00:24:50 marvin kernel: real memory = 17179869184 (16384 MB) > Sep 14 00:24:50 marvin kernel: avail memory = 16590356480 (15821 MB) Please try https://reviews.freebsd.org/D31958
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