Date: Wed, 27 Dec 2017 23:27:45 -0800 From: Eitan Adler <lists@eitanadler.com> To: Mark Millard <markmi@dsl-only.net> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: faq/troubleshoot.html#indefinite-wait-buffer has the direction of transfer wrong (head -r326888 /usr/src/) Message-ID: <CAF6rxg=zQRo%2BKc4p%2B-90sJJxFGHzkk9%2B=1E2bdAFhNffE%2Bz1CQ@mail.gmail.com> In-Reply-To: <8D8CFFA3-ADE9-402F-B9A1-C311E4244FCB@dsl-only.net> References: <BD1E6290-23E1-4231-8E0A-AC0FEA3F32C2@dsl-only.net> <CAF6rxg=yOEnLm4VQGoCyTnQoQaLcgqvOo42UgQazA-0SAwPfyg@mail.gmail.com> <8D8CFFA3-ADE9-402F-B9A1-C311E4244FCB@dsl-only.net>
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On 16 December 2017 at 20:34, Mark Millard <markmi@dsl-only.net> wrote: > > On 2017-Dec-16, at 8:23 PM, Eitan Adler <lists at eitanadler.com> wrote: > >> On 16 December 2017 at 10:47, Mark Millard <markmi at dsl-only.net> wrot= e: >>> I got a "swap_pager: indefinite wait buffer" notice and looked >>> it up. (This was on a rpi2 booted (kernel and world) from a >>> USB SSD, swap partition in use instead of a swap file. It >>> was building devel/cmake via poudriere-devel .) >>> >>> https://www.freebsd.org/doc/faq/troubleshoot.html#indefinite-wait-buffe= r >>> reads like it is for page-out to disk: >>> >>> >>> QUOTE >>> 5.9. >>> >>> What does the error swap_pager: indefinite wait buffer: mean? >>> >>> This means that a process is trying to page memory to disk, and the pag= e attempt has hung trying to access the disk for more than 20 seconds. It m= ight be caused by bad blocks on the disk drive, disk wiring, cables, or any= other disk I/O-related hardware. If the drive itself is bad, disk errors w= ill appear in /var/log/messages and in the output of dmesg. Otherwise, chec= k the cables and connections. >>> ENDQUOTE >>> >>> >>> But the code containing the message is for "swread": >>> (head -r326888) >> >> If I understand correctly this is fixed by change "trying to page to" >> to "trying to page from" ? In other words this happens on swap-in, >> not swap-out. > > That is my understanding of what I reported. Sorry about the delay: Sending faq/book.xml Transmitting file data .done Committing transaction... Committed revision 51344. Fixed. --=20 Eitan Adler
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