Date: Sat, 16 Dec 2017 20:23:46 -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=yOEnLm4VQGoCyTnQoQaLcgqvOo42UgQazA-0SAwPfyg@mail.gmail.com> In-Reply-To: <BD1E6290-23E1-4231-8E0A-AC0FEA3F32C2@dsl-only.net> References: <BD1E6290-23E1-4231-8E0A-AC0FEA3F32C2@dsl-only.net>
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On 16 December 2017 at 10:47, Mark Millard <markmi@dsl-only.net> wrote: > 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-buffer > 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 page = attempt has hung trying to access the disk for more than 20 seconds. It mig= ht be caused by bad blocks on the disk drive, disk wiring, cables, or any o= ther disk I/O-related hardware. If the drive itself is bad, disk errors wil= l appear in /var/log/messages and in the output of dmesg. Otherwise, check = 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. --=20 Eitan Adler
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