gitweb.dragonflybsd.org Git - freebsd.git/commit

author	cem <cem@FreeBSD.org>
	Mon, 31 Oct 2016 23:09:52 +0000 (23:09 +0000)
committer	cem <cem@FreeBSD.org>
	Mon, 31 Oct 2016 23:09:52 +0000 (23:09 +0000)
commit	7ae132fee10d014535f1cd5ec53a2584871715c7
tree	38a4d4d75a173395017b59aa5d986d25e29e841a	tree \| snapshot
parent	9d25b3f0046282ba17451e21d1a02b0f7fed2627	commit \| diff

Add BUF_TRACKING and FULL_BUF_TRACKING buffer debugging

Upstream the BUF_TRACKING and FULL_BUF_TRACKING buffer debugging code.
This can be handy in tracking down what code touched hung bios and bufs
last. The full history is especially useful, but adds enough bloat that
it shouldn't be enabled in release builds.

Function names (or arbitrary string constants) are tracked in a
fixed-size ring in bufs. Bios gain a pointer to the upper buf for
tracking. SCSI CCBs gain a pointer to the upper bio for tracking.

Reviewed by: markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D8366

19 files changed:

sys/amd64/conf/GENERIC		diff \| blob \| blame \| history
sys/amd64/conf/GENERIC-NODEBUG		diff \| blob \| blame \| history
sys/cam/cam_ccb.h		diff \| blob \| blame \| history
sys/cam/cam_periph.c		diff \| blob \| blame \| history
sys/cam/cam_xpt.c		diff \| blob \| blame \| history
sys/cam/scsi/scsi_da.c		diff \| blob \| blame \| history
sys/conf/options		diff \| blob \| blame \| history
sys/dev/mps/mps_sas.c		diff \| blob \| blame \| history
sys/geom/geom_dev.c		diff \| blob \| blame \| history
sys/geom/geom_disk.c		diff \| blob \| blame \| history
sys/geom/geom_io.c		diff \| blob \| blame \| history
sys/geom/geom_subr.c		diff \| blob \| blame \| history
sys/geom/geom_vfs.c		diff \| blob \| blame \| history
sys/geom/part/g_part.c		diff \| blob \| blame \| history
sys/kern/vfs_bio.c		diff \| blob \| blame \| history
sys/kern/vfs_cluster.c		diff \| blob \| blame \| history
sys/sys/bio.h		diff \| blob \| blame \| history
sys/sys/buf.h		diff \| blob \| blame \| history
sys/vm/vm_pager.c		diff \| blob \| blame \| history

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