Date: Sun, 5 Dec 2010 10:02:08 -0800 From: Artem Belevich <fbsdlist@src.cx> To: Thomas Zander <thomas.e.zander@googlemail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: DTrace (or other monitor) access to LBA of a block device Message-ID: <AANLkTim2VCanQ1Sp15GU5Td8bL=J-8drkoZPKqTgbwtv@mail.gmail.com> In-Reply-To: <AANLkTikWoCmRQE6VDG1S88s5UCtXY7acP1Q_pwo=gYY%2B@mail.gmail.com> References: <AANLkTi=2Ln5s-mD%2B%2B-iKEq2v-1f31fpavXB7kUfTC2Lf@mail.gmail.com> <AANLkTikWoCmRQE6VDG1S88s5UCtXY7acP1Q_pwo=gYY%2B@mail.gmail.com>
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> GEOM sounds like a good candidate for probing of that kind.
>
> sudo dtrace -n 'fbt:kernel:g_io_deliver:entry { printf("%s %d %d
> %d\n",stringof(args[0]->bio_from->geom->name), args[0]->bio_cmd,
> args[0]->bio_offset, args[0]->bio_length); }'
By the way, in order for this to work one would need r207057 applied
to -8. Any chance that could be MFC'ed?
http://svn.freebsd.org/viewvc/base?view=revision&revision=207057
--Artem
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