races while allowing consistent lockless sampling of the per-cpu
statistics without atomic operations. Update comment describing
the locking protocol to include this.
These files were fumble-fingered out of the last commit.
- vcache_get() retrieves a referenced and initialised vnode / fs node pair.
- vcache_remove() removes a vnode / fs node pair from the cache.
On cache miss vcache_get() calls new vfs operation vfs_loadvnode() to
initialise a vnode / fs node pair. This call is guaranteed exclusive,
no other thread will try to load this vnode / fs node pair.
Convert ufs/ext2fs, ufs/ffs and ufs/mfs to use this interface.
Remove now unused ufs/ufs_ihash
Discussed on tech-kern.
Welcome to 6.99.41
Push -Wno-array-bounds down to the cases that depend on it.
Selectively disable warnings for 3rd party software or non-trivial
issues to be reviewed later to get clang -Werror to build most of the
tree.
rename "UVMHIST" option to enable the uvm histories.
TODO:
- make UVMHIST properly depend upon KERNHIST
- enable dynamic registration of histories. this is mostly just
allocating something in a bitmap, and is only for viewing multiple
histories in a merged form.
tested on amd64 and sparc64.
obtained via sysctl, we can skip it entirely. This means we can run even
if not setgid.
getuptime will now use sysctl/clock_gettime if memf is NULL.
doevcnt now sues sysctl(kern.evcnt) is memf is NULL. It falls back to
groveling if sysctl returns an error of ENOENT.
dointr will call doevcnt to evcnt based intr stats.
also only use 16 u_shorts instead of 32 ints. Also add panic()
calls for under- and overflow of the ks_active members under
DIAGNOSTIC. The MAXBUCKET constant ended up in sys/mallocvar.h
and not sys/param.h, as the latter caused build problems.
Ride the kernel revision bump of my previous change.
per size, and make vmstat report this information under the "Memory
statistics by type" display, which is only printed when the kernel
has been compiled with KMEMSTATS defined, like this:
Memory statistics by type Type Kern
Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
wapbl 15 4192K 4192K 78644K 376426 0 0 32:0,256:3,512:6,131072:1,262144:2,524288:3
Since struct malloc_type is user-visible and is changed, bump kernel
revision to 5.99.26.
While it is true that malloc(9) is in general on the path of slowly
being replaced by kmem(9) (kmem_alloc/kmem_free), there remains a
lot of points of usage of malloc/free, and this could aid in finding
any leaks. (It helped finding the leak fixed in PR#42661.)
This was discussed with and somewhat hestitantly OKed by rmind@
- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.
Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).
Discussed on <tech-kern>, reviewed by <ad>.
christos