Commit Graph

67 Commits

Author SHA1 Message Date
fvdl ea3e5a38b8 Fix from Ethan Solomita <ethan@geocast.com> to avoid a livelock problem
where the buffer cache code would be recycling B_AGE buffers with
dependencies.
2000-04-12 11:33:43 +00:00
augustss 264f1d27c6 Get rid of register declarations. 2000-03-30 09:27:11 +00:00
thorpej 445e42d77a One small piece from UBC: create a pool for I/O buffers. One small piece
not from UBC: make physio use it instead of its own home-grown thing.
2000-02-14 20:12:02 +00:00
thorpej fe551f0e64 Fix a bug in disksort_*() which caused non-optimal ordering when multiple
active partitions were on a single spindle.  Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.
2000-02-07 20:16:47 +00:00
thorpej 0ef111e8ee - Implement bowrite() -- perform an asynchronous, ordered write. 2000-01-21 23:22:24 +00:00
ragge 184f8b2c39 First round of discarding the CL* macros. 1999-12-03 21:43:19 +00:00
fvdl 2aea14c604 Clear B_AGE in bdirty(), this buffer must go through the LRU again
to be back on the AGE queue. Otherwise we risk recycling a set
of buffers with (soft) dependencies on the AGE list, which may
last forever if the vnode they belong to is locked (i.e. the syncer
won't get to the buffers they depend on, so their dependencies
are never flushed).
1999-11-26 17:18:15 +00:00
fvdl d901f6eae0 Be more careful to block bio interrupts for some data structures. There
were at least a few missed cases where vp->v_{clean,dirty}blkhd were
unprotected since the softdep/trickle sync merge.
1999-11-23 23:52:40 +00:00
fvdl 0b1963121a Add Kirk McKusick's soft updates code to the trunk. Not enabled by
default, as the copyright on the main file (ffs_softdep.c) is such
that is has been put into gnusrc. options SOFTDEP will pull this
in. This code also contains the trickle syncer.

Bump version number to 1.4O
1999-11-15 18:49:07 +00:00
mycroft d4026f6eb5 GC the B_CACHE bit. 1998-11-09 01:18:34 +00:00
mycroft 13daec0fb1 Several things:
* Change the usage of B_DONE so that it is only set when a buffer is in sync
  with the data on disk.
* If a buffer is being waited for, don't put it on the age queue.
* Make sure to clear B_DONE when pages are stolen from a buffer.
* Make sure to clear B_CACHE after each use.
* If we find a buffer for the block we want with valid data, but it is too
  small, panic.  (This isn't supposed to happen.)
Fixes potential file corruption problems with clustering.
1998-10-27 23:48:22 +00:00
eeh a2dd74ed79 Merge paddr_t changes into the main branch. 1998-08-13 02:10:37 +00:00
perry 275d1554aa Abolition of bcopy, ovbcopy, bcmp, and bzero, phase one.
bcopy(x, y, z) ->  memcpy(y, x, z)
ovbcopy(x, y, z) -> memmove(y, x, z)
   bcmp(x, y, z) ->  memcmp(x, y, z)
  bzero(x, y)    ->  memset(x, 0, y)
1998-08-04 04:03:10 +00:00
perry 730baa7431 fix sizeofs so they comply with the KNF style guide. yes, it is pedantic. 1998-07-31 22:50:48 +00:00
chs f64abc7b4c add flags arg to hashinit(), to pass to malloc(). 1998-02-07 02:44:44 +00:00
pk 37d77087e8 Check `b_dev' field in bdwrite() before using it as an index into bdevsw[].
`b_dev' value of NODEV happens and is normal if the buffer is on its way
to the underlying device strategy function for the first time.

Also, MFS sillily uses a major device number (255) which cannot be used
to index bdevsw[]. Check marked with XXXs.
1997-07-08 22:03:30 +00:00
pk b7b1073fd0 In bread() and breadn(): if getblk() returns a DELWRI buffer, don't
call biowait() but return `success' immediately. We can return `success'
because buffers with recorded errors are not returned by getblk().
(Takes care of PR#3694).
1997-07-08 21:42:59 +00:00
mycroft 6911ff7d13 Fix two performance issues:
* When a delayed write buffer falls off the LRU queue, arrange for it to go on
  the AGE queue after being flushed out to disk.
* When a delayed write buffer is synced, leave it in its relative position in
  the LRU queue.
1997-04-09 21:12:10 +00:00
cgd c8e4c454f2 curproc was being used directly for ru_{in,ou}block counting. Instead
of using it directly, use a local, and set that local to be curproc
if curproc is not NULL else a pointer to process 0's proc struct.
If syncing disks while handling a panic that occurred while 'curproc'
was NULL, the old code would dereference NULL and die.
1996-10-15 23:06:27 +00:00
christos f443b89c92 backout previous kprintf change 1996-10-13 02:32:29 +00:00
christos 60d201973e printf -> kprintf, sprintf -> ksprintf 1996-10-10 22:46:11 +00:00
mycroft 506cefab8c In the sync case of bwrite(), move the accounting earlier so that so that the
delayed write is logically converted to a sync write, mirroring the async case.
In bdwrite(), move the tape case earlier to avoid needless reassignbuf()s.
1996-06-18 20:50:23 +00:00
pk b298c40fbe Call reassignbuf() at splbio in bdwrite(). 1996-06-17 22:21:31 +00:00
pk 50e7d72655 Protect vnode when updating for started IO on buffers. 1996-06-11 11:15:36 +00:00
christos 4ef330b934 remove include of <sys/cpu.h> 1996-04-22 01:38:12 +00:00
fvdl 56a654e17f Changes for NVSv3 code: pull in more NFS include files into kern_time.c
to get types right (overkill for just one function call, but oh well).
Clear B_NEEDCOMMIT in bdwrite().
1996-02-18 11:57:06 +00:00
christos 09afd77655 More proto fixes 1996-02-09 18:59:18 +00:00
christos e630447d8c First pass at prototyping 1996-02-04 02:17:43 +00:00
cgd 32b4385a97 fix bug pointed out by, and do the cleanup suggested by
Alasdair Baird <alasdair@wildcat.demon.co.uk>.  From pr 1301.
1995-08-02 22:01:46 +00:00
cgd f5bbdfba41 bdwrite() should upgrade writes to tape devices by sending them to
bawrite().  it's logically more correct (doesn't return an error code,
because it's async; bdwrite is also async), it still writes things
in-order, it makes sure the proper accountins is done (see the
wasdelayed cases in bwrite()), and it allows writes to vnodes on volumes
mountd with the MNT_ASYNC to be converted into delayed writes the way
God, err, Kirk intended.  Convert synchronous bwrite()s on MNT_ASYNC
file systems to delayed writes.
1995-07-12 07:56:31 +00:00
cgd 9c3fe30d92 fix long-standing XXX in getblk(): NFS does funky things (somewhat
explained in comments), which can cause a race condition.  amazingly,
the _only_ time i've ever seen or heard of this problem was in some
comments and sources by Rick Macklem, and when running against the
a DEC OSF/1 NFS server running on an Alpha.
1995-07-12 07:39:00 +00:00
cgd 3176641085 fix pr 1128; change vfs_bufstats defn from DIAGNOSTIC - > DEBUG 1995-06-20 10:42:33 +00:00
mycroft 04a0a9a518 Use the new d_type field. 1995-04-10 00:46:51 +00:00
mycroft 642eb11a86 Various code rearrangement. 1994-11-22 01:31:02 +00:00
cgd 6ac2bbfc35 be more careful with types, also pull in headers where necessary. 1994-10-30 21:43:03 +00:00
mycroft f5232de492 Patch to fix `reassignbuf: NULL' messages, from cgd. 1994-08-29 01:47:02 +00:00
cgd ea01579f35 light clean up, use some macros 1994-07-03 07:57:32 +00:00
cgd cf92afd66e New RCS ID's, take two. they're more aesthecially pleasant, and use 'NetBSD' 1994-06-29 06:29:24 +00:00
mycroft 11884bb842 Minor cleanup. 1994-06-14 19:36:14 +00:00
mycroft 699bbb84b6 Update to 4.4-Lite fs code. 1994-06-08 11:28:29 +00:00
cgd ffde2d4a28 minor type pointed out by Onno van der Linden 1994-06-05 13:00:49 +00:00
mycroft 766c830cb5 Clear more flags in brelse(). 1994-05-29 22:50:50 +00:00
mycroft facfcdd2ef Cluster routines want 0-sized bufs. 1994-05-27 11:05:54 +00:00
cgd 7f683b3792 some paranoia, also, clean up spaces vs. tabs 1994-05-19 03:04:01 +00:00
cgd c18ec4dca5 my two favorite reference books 1994-05-18 10:51:13 +00:00
cgd fbd5b44ec7 forgot the damned rcsid 1994-05-18 10:28:14 +00:00
cgd ddca406d72 significant rework, to match 4.4-Lite interfaces, and to comment more
closely from Bach.
1994-05-18 10:24:54 +00:00
cgd 179c5769e3 notdef out vn_bwrite out, for now, so that kernels compile, until new fs stuff 1994-05-17 10:50:56 +00:00
mycroft 6c7bd3b00f Implement new functions for 4.4-Lite file systems, and some general cleanup. 1994-05-17 03:43:46 +00:00
cgd 009e6dd4e9 rearrange some splfoo 1994-04-28 01:17:00 +00:00