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History log of /src/sys/dev/raidframe/rf_psstatus.c
RevisionDateAuthorComments
 1.39  10-Feb-2024  andvar fix various typos in comments and log messages.
 1.38  23-Jul-2021  oster Extensive mechanical changes to the pools used in RAIDframe.

Alloclist remains not per-RAID, so initialize that pool
separately/differently than the rest.

The remainder of pools in RF_Pools_s are now per-RAID pools. Mostly
mechanical changes to functions to allocate/destroy per-RAID pools.
Needed to make raidPtr available in certain cases to be able to find
the per-RAID pools.

Extend rf_pool_init() to now populate a per-RAID wchan value that is
unique to each pool for a given RAID device.

TODO: Complete the analysis of the minimum number of items that are
required for each pool to allow IO to progress (i.e. so that a request
for pool resources can always be satisfied), and dynamically scale
minimum pool sizes based on RAID configuration.
 1.37  10-Oct-2019  christos branches: 1.37.12;
fix the function pointer and callback mess:
- callback functions return 0 and their result is not checked; make them void.
- there are two types of callbacks and they used to overload their parameters
and the callback structure; separate them into "function" and "value"
callbacks.
- make the wait function signature consistent.
 1.36  10-Feb-2019  christos Introduce PR_ZERO to avoid open-coding memset()s everywhere. OK riastradh@.
 1.35  09-Feb-2019  christos - Change the allocation macros to be more like function calls
- Change sizeof(type) -> sizeof(*variable)
- Use macros for the long buffer length allocations
- Remove "bit polishing" memsets() -- do them only once
- Remove unnecessary casts

Thanks to oster@ for finding bugs and testing.
 1.34  03-May-2011  mrg branches: 1.34.56;
convert the pssTable mutex into a kmutex/cv.
 1.33  16-Nov-2006  christos branches: 1.33.76; 1.33.82;
__unused removal on arguments; approved by core.
 1.32  12-Oct-2006  christos - sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386
 1.31  14-Feb-2006  oster branches: 1.31.14; 1.31.16;
RAIDframe was erroneously re-initializing the Parity Stripe Status
pool each time a new array was configured. This causes grief
with things like 'vmstat -m' by causing it to loop. Make RAIDframe
only initialize PSS bits once.

Pointed out by simonb@. Fix tested by simonb@. Thanks!
 1.30  11-Dec-2005  christos branches: 1.30.2; 1.30.4; 1.30.6;
merge ktrace-lwp.
 1.29  27-Feb-2005  perry branches: 1.29.2; 1.29.4; 1.29.12;
nuke trailing whitespace
 1.28  18-Mar-2004  oster branches: 1.28.8; 1.28.10;
Re-work the locking mechanisms for reconstruct and PSS structures
such that we don't actually hold a simplelock while we are doing
a pool_get(), but that we still effectively protecting critical code.

This should fix all of the outstanding LOCKDEBUG warnings related to
rebuilding RAID sets.
 1.27  08-Mar-2004  oster Move pss_pool to rf_pools. Will save a bit of extra memory at
run-time, and we can only do one reconstruction at a time anyway.
Nuke pss_issued_pool - move it to an internal structure in pss.
 1.26  07-Mar-2004  oster - Introduce rf_pools which contains all of the various global pools used
by RAIDframe. Convert all other RAIDframe global pools to use pools
defined within this new structure.
- Introduce rf_pool_init(), used for initializing a single pool in
RAIDframe. Teach each of the configuration routines to use
rf_pool_init().
- Cleanup a few pool-related comments.
- Cleanup revent initialization and #defines.
- Add a missing pool_destroy() for the reconbuffer pool.

(Saves another 1K off of an i386 GENERIC kernel, and makes
stuff a lot more readable)
 1.25  05-Mar-2004  oster - remove the RF_*_INC's, as necessary. They are not needed any more.
- introduce RF_MIN_*'s, as necessary. These will indicate the
low-water mark for pools as well as the pool_prime() value.
- add pool_setlowat() for the critical pools.
- pool_prime() and pool_setlowat() the raidframe_cbufpool.
- re-order some pool_prime()'s and pool_sethiwat()'s for clarity.
 1.24  04-Mar-2004  oster Remove a comment that is no longer relevant.
 1.23  03-Mar-2004  oster Improve comments on rf_LookupRUStatus(). No functional changes.
 1.22  03-Mar-2004  oster - cleanup memory allocation in rf_AllocPSStatus()
- change function signature of rf_LookupRUStatus(). The last argument
is now a pointer to a new PSS, in case one is needed. Rather than
having rf_LookupRUStatus() allocate a new PSS, we pre-allocate one
beforehand, where necessary, just in case.
- change callers of rf_lookupRUStatus() to deal with the new way of
calling rf_lookupRUStatus().

[no improvement or worsening of parity rebuild/initialization performance.]
 1.21  29-Feb-2004  oster Adjust _rf_ShutdownCreate() so that it is willing to wait for more
memory. Since we only now ever "return(0)", just return (void)
instead.

Cleanup all uses of rf_ShutdownCreate() to not worry about
it ever failing. Shaves another 600 bytes off of an i386 GENERIC kernel.
 1.20  31-Dec-2003  oster Increase the scope of RF_DEBUG_PSS to cover a bit more stuff.
 1.19  30-Dec-2003  oster Some days you wonder if some of the function declaration consistency
was just an accident in the first place. Cleanup function decls and
a few comments. [ok.. so I wasn't going to fix this many.. but once
you're on a roll....]
 1.18  29-Dec-2003  oster Since rf_mutex_destroy() is effectively a NOP now, nuke it.
 1.17  29-Dec-2003  oster Simplify defn's of rf_mutex_init() and rf_mutex_destroy(). Since
neither of these ever fail, no need to have a return value. That
makes all the "error detection" on these functions completely
unneeded. But since we're here, if we don't have a return value, then
why not make these macros? My.. look how things keep shrinking, with
no loss in functionality!
 1.16  29-Dec-2003  oster - first kick at a major reworking of RAIDframe's memory allocation code:
- all freelists converted to pools
- initialization of structure members in certain cases where
code was relying on specific allocation and usage properties
to keep structures in a "known state" (that doesn't work with
pools!).
- make most pool_get() be "PR_WAITOK" until they can be analyzed
further, and/or have proper error handling added.
- all RF_Mallocs zero the space returned, so there is no difference
between RF_Calloc and RF_Malloc. In fact, all the RF_Calloc()'s
do is tend to do is get things horribly confused.
Make RF_Malloc() the "general memory allocator", with
RF_MallocAndAdd() the "general memory allocator with
allocation list".
- some of these RF_Malloc's et al. are destined to disappear.
- remove rf_rdp_freelist entirely (it's not used anywhere!)
- remove: #include "rf_freelist.h"
- to the files that were relying on the above, add: #include "rf_general.h"
- add: #include "rf_debugMem.h" to rf_shutdown.h to make it happy
about the loss of: #include "rf_freelist.h".

This shrinks an i386 GENERIC kernel by approx 5K. RAIDframe now
weighs in at about 162K on i386.
 1.15  29-Dec-2003  oster [Having received a definite lack of strenuous objection, a small amount
of strenuous agreement, and some general agreement, this commit is
going ahead because it's now starting to block some other changes I
wish to make.]

Remove most of the support for the concept of "rows" from RAIDframe.
While the "row" interface has been exported to the world, RAIDframe
internals have really only supported a single row, even though they
have feigned support of multiple rows.

Nothing changes in configuration land -- config files still need to
specify a single row, etc. All auto-config structures remain fully
forward/backwards compatible.

The only visible difference to the average user should be a
reduction in the size of a GENERIC kernel (i386) by 4.5K. For those
of us trolling through RAIDframe kernel code, a lot of the driver
configuration code has become a LOT easier to read.
 1.14  21-Dec-2003  oster Since the 5th arg of pool_init() wasn't actually the number
of items with which to prime the pool, we now prime each
pool using pool_prime().
 1.13  21-Dec-2003  simonb Fix usage of fifth argument to pool_init().
 1.12  12-Nov-2002  oster branches: 1.12.6;
xorBufCount needs to be initialized too!
 1.11  11-Oct-2002  oster poolify the allocation of Parity Stripe Status structures.

XXX: Current code may have problems if kernel memory is completely depleted.
This is, unfortunately, not the only chunk of RAIDframe code to have
this problem, and will have to be dealt with. :(
 1.10  19-Sep-2002  oster Introduce and use RF_DEBUG_PSS, and save a few more bytes.
 1.9  14-Sep-2002  oster Everyone and their dog was using RF_ERRORMSG3 to print out the same
sort of error message, over and over again, in different files.
Rather than having the same text repeated in multiple .o files,
create a couple of little functions to do the printing, and save a
bundle of space. Also improves readability of code.
 1.8  13-Nov-2001  lukem add RCSIDs
 1.7  04-Oct-2001  oster Step 2 of the disentanglement. We now look to <dev/raidframe/*> for
the stuff that used to live in rf_types.h, rf_raidframe.h, rf_layout.h,
rf_netbsd.h, rf_raid.h, rf_decluster,h, and a few other places.
Believe it or not, when this is all done, things will be cleaner.

No functional changes to RAIDframe.
 1.6  18-Jul-2001  thorpej branches: 1.6.2;
bzero -> memset
 1.5  08-Jan-2000  oster branches: 1.5.6; 1.5.8;
- nuke calls to rf_get_threadid() and associated #include
- change a bunch of debugging printfs from
"[%d] ...", tid (where tid is the "thread id")
to
"raid%d: ...", raidPtr->raidid
- other minor rototillage
 1.4  13-Aug-1999  oster branches: 1.4.2;
rf_sys.h does not need to be #included in any of these files, and, actually,
is no longer needed at all.
 1.3  05-Feb-1999  oster Phase 2 of the RAIDframe cleanup. The source is now closer to KNF
and is much easier to read. No functionality changes.
 1.2  26-Jan-1999  oster RAIDframe cleanup, phase 1. Nuke simulator support, user-land driver,
out-dated comments, and other unneeded stuff. This helps prepare
for cleaning up the rest of the code, and adding new functionality.

No functional changes to the kernel code in this commit.
 1.1  13-Nov-1998  oster RAIDframe, version 1.1, from the Parallel Data Laboratory at
Carnegie Mellon University. Full RAID implementation, including
levels 0, 1, 4, 5, 6, parity logging, and a few other goodies.
Ported to NetBSD by Greg Oster.
 1.4.2.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.
 1.5.8.3  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.5.8.2  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.5.8.1  03-Aug-2001  lukem update to -current
 1.5.6.6  11-Dec-2002  thorpej Sync with HEAD.
 1.5.6.5  18-Oct-2002  nathanw Catch up to -current.
 1.5.6.4  17-Sep-2002  nathanw Catch up to -current.
 1.5.6.3  14-Nov-2001  nathanw Catch up to -current.
 1.5.6.2  22-Oct-2001  nathanw Catch up to -current.
 1.5.6.1  24-Aug-2001  nathanw Catch up with -current.
 1.6.2.1  11-Oct-2001  fvdl Catch up with -current. Fix some bogons in the sparc64 kbd/ms
attach code. cd18xx conversion provided by mrg.
 1.12.6.4  04-Mar-2005  skrll Sync with HEAD.

Hi Perry!
 1.12.6.3  21-Sep-2004  skrll Fix the sync with head I botched.
 1.12.6.2  18-Sep-2004  skrll Sync with HEAD.
 1.12.6.1  03-Aug-2004  skrll Sync with HEAD
 1.28.10.1  19-Mar-2005  yamt sync with head. xen and whitespace. xen part is not finished.
 1.28.8.1  29-Apr-2005  kent sync with -current
 1.29.12.1  15-Feb-2006  riz Pull up following revision(s) (requested by oster in ticket #1170):
sys/dev/raidframe/rf_driver.c: revision 1.110
sys/dev/raidframe/rf_psstatus.c: revision 1.31
sys/dev/raidframe/rf_psstatus.h: revision 1.13
RAIDframe was erroneously re-initializing the Parity Stripe Status
pool each time a new array was configured. This causes grief
with things like 'vmstat -m' by causing it to loop. Make RAIDframe
only initialize PSS bits once.
Pointed out by simonb@. Fix tested by simonb@. Thanks!
 1.29.4.1  21-Jun-2006  yamt sync with head.
 1.29.2.1  15-Feb-2006  riz Pull up following revision(s) (requested by oster in ticket #1170):
sys/dev/raidframe/rf_driver.c: revision 1.110
sys/dev/raidframe/rf_psstatus.c: revision 1.31
sys/dev/raidframe/rf_psstatus.h: revision 1.13
RAIDframe was erroneously re-initializing the Parity Stripe Status
pool each time a new array was configured. This causes grief
with things like 'vmstat -m' by causing it to loop. Make RAIDframe
only initialize PSS bits once.
Pointed out by simonb@. Fix tested by simonb@. Thanks!
 1.30.6.1  22-Apr-2006  simonb Sync with head.
 1.30.4.1  09-Sep-2006  rpaulo sync with head
 1.30.2.1  18-Feb-2006  yamt sync with head.
 1.31.16.2  10-Dec-2006  yamt sync with head.
 1.31.16.1  22-Oct-2006  yamt sync with head
 1.31.14.1  18-Nov-2006  ad Sync with head.
 1.33.82.1  06-Jun-2011  jruoho Sync with HEAD.
 1.33.76.1  31-May-2011  rmind sync with head
 1.34.56.2  13-Apr-2020  martin Mostly merge changes from HEAD upto 20200411
 1.34.56.1  10-Jun-2019  christos Sync with HEAD
 1.37.12.1  01-Aug-2021  thorpej Sync with HEAD.

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