src-test2/sys/geom/notes, branch release/7.2.0_cvs FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F7.2.0_cvs 2009-05-01T02:51:58Z Copy releng/7.2 to release/7.2.0 for FreeBSD 7.2-RELEASE. 2009-05-01T02:51:58Z Ken Smith kensmith@FreeBSD.org 2009-05-01T02:51:58Z urn:sha1:b205d83df7763ca1f099bce5ac12a05862a626c4 Approved by: re (implicit) This commit was manufactured to restore the state of the 7.2-RELEASE image. For removable devices without media we set a zero mediasize but a non-zero 2004-09-05T21:15:58Z Poul-Henning Kamp phk@FreeBSD.org 2004-09-05T21:15:58Z urn:sha1:5ae652c0ed19b11e5080de5145302f7723a2b61a sectorsize in order to avoid a lot of checks around various divisions etc. Enforce the sectorsize being > 0 with a KASSERT on successful open. Fix scsi_cd.c to return 2k sectors when no media inserted. A note about which #include files may be used where. 2003-03-23T10:08:13Z Poul-Henning Kamp phk@FreeBSD.org 2003-03-23T10:08:13Z urn:sha1:679c4aa68cefd7bb14bb098bd81d0d5702c0f6a1 Better names for struct disk elements: d_maxsize, d_stripeoffset 2003-02-11T14:57:34Z Poul-Henning Kamp phk@FreeBSD.org 2003-02-11T14:57:34Z urn:sha1:8a63edc3a1082a88f6b3415c6d1aa33a1992b536 and d_stripesisze; Introduce si_stripesize and si_stripeoffset in struct cdev so we can make the visible to clustering code. Add stripesize and stripeoffset to providers. DTRT with stripesize and stripeoffset in various places in GEOM. Update the statistics collection code to track busy time instead of 2003-02-09T17:04:57Z Poul-Henning Kamp phk@FreeBSD.org 2003-02-09T17:04:57Z urn:sha1:cce7303af3e298a5c62c491c988687eb877d71f9 idle time. Statistics now default to "on" and can be turned off with sysctl kern.geom.collectstats=0 Performance impact of statistics collection is on the order of 800 nsec per consumer/provider set on a 700MHz Athlon. Commit the correct copy of the g_stat structure. 2003-02-07T23:08:24Z Poul-Henning Kamp phk@FreeBSD.org 2003-02-07T23:08:24Z urn:sha1:801bb689ca8be76700b0c16c159683b5fa89472d Add debug.sizeof.g_stat sysctl. Set the id field of the g_stat when we create consumers and providers. Remove biocount from consumer, we will use the counters in the g_stat structure instead. Replace one field which will need to be atomically manipulated with two fields which will not (stat.nop and stat.nend). Change add companion field to bio_children: bio_inbed for the exact same reason. Don't output the biocount in the confdot output. Fix KASSERT in g_io_request(). Add sysctl kern.geom.collectstats defaulting to off. Collect the following raw statistics conditioned on this sysctl: for each consumer and provider { total number of operations started. total number of operations completed. time last operation completed. sum of idle-time. for each of BIO_READ, BIO_WRITE and BIO_DELETE { number of operations completed. number of bytes completed. number of ENOMEM errors. number of other errors. sum of transaction time. } } API for getting hold of these statistics data not included yet.