- Reorganize locking in UVM and provide extra serialisation for pmap(9).
New lock order: [vmpage-owner-lock] -> pmap-lock.
- Simplify locking in some pmap(9) modules by removing P->V locking.
- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).
- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.
- Unify /dev/mem et al in MI code and provide required locking (removes
kernel-lock on some ports). Also, avoid cache-aliasing issues.
Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.
Fixes the following PRs:
PR kern/44515 (cgd dies on non-aligned writes to the raw device)
PR kern/44964 (cgd seems to panic on unaligned writes instead of giving EINVAL)
ok christos
and the metadata required to interpret it. Callers of namei must now
create a pathbuf and pass it to NDINIT (instead of a string and a
uio_seg), then destroy the pathbuf after the namei session is
complete.
Update all namei call sites accordingly. Add a pathbuf(9) man page and
update namei(9).
The pathbuf interface also now appears in a couple of related
additional places that were passing string/uio_seg pairs that were
later fed into NDINIT. Update other call sites accordingly.
Make sure non-MPsafe iodone callbacks raise the SPL as appropriate.
Fix buffer corruption issue I noticed in dk(4), and probable similar
issues in vnd(4) and cgd(4).
on error, that leaves the cgd_softc in an inconsistent state.
Fixes a crash during shutdown reported by Patrick Welche. Thanks
to Patrick for reporting and for testing the fix.
for the patches!
I've lightly tested the basics: create cgd0 on vnd0d, initialize with
zeros, newfs /dev/cgd0a, mount, copy files on, unmount, drvctl -d
cgd0. Works fine. I also shutdown with a cgd0 configured: detached as
expected.
cgd inadvertently encrypts blkno eight times to generate IV
Add "encblkno1" IV type to encrypt only once, rename old "encblkno" to
"encblkno8" for clarity, and make "encblkno" an alias for "encblkno8"
for backward compatibility.
The general trend is to remove it from all kernel interfaces and
this is a start. In case the calling lwp is desired, curlwp should
be used.
quick consensus on tech-kern
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
that tells whether the given path is in user space or kernel space, so it
can tell NDINIT().
While the raidframe calls were ok, both ccd(4) and cgd(4) were passing
pointers to user space data, which leads to strange error on i386, as
reported by Jukka Salmi on current-users.
The issue has been there since last august, I'm actually a bit surprised
that no one in the meantime has used ccd(4) or cgd(4) on an arch where it
would have simply faulted.
* Corrected type of keybytes to size_t to prevent a potential buffer
overflow on 64-bit archs.
* Fixed incorrect but harmless use of sizeof.
hexprint():
* Corrected cast to prevent sign extension if char is signed.
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)
jruoho