filesystem (and other things that needed to be fixed before the tests
would complete), to wit:
* Include the fs ident in the filehandle; improve stale filehandle checks.
* Change definition of blksize() to use the on-dinode size instead of
the inode's i_size, so that fsck_lfs will work properly again.
* Use b_interlock in lfs_vtruncbuf.
* Postpone dirop reclamation until after the seglock has been released,
so that lfs_truncate is not called with the segment lock held.
* Don't loop in lfs_fsync(), just write everything and wait.
* Be more careful about the interlock/uobjlock in lfs_putpages: when we
lose this lock, we have to resynchronize dirtiness of pages in each
block.
* Be sure to always write indirect blocks and update metadata in
lfs_putpages; fixes a bug that caused blocks to be accounted to the
wrong segment.
first step towards per-device MAXPHYS, and has the beneficial side effect
of allowing clustering to MAXPHYS even on systems that need to run with
a reduced MAXBSIZE to get more metadata buffers.
* Define a new "MMU type", ARM_MMU_SA1. While the SA-1's MMU is basically
compatible with the generic, the SA-1 cache does not have a write-through
mode, and it is useful to know have an indication of this.
* Add a new PMAP_NEEDS_PTE_SYNC indicator, and try to evaluate it at
compile time. We evaluate it like so:
- If SA-1-style MMU is the only type configured -> 1
- If SA-1-style MMU is not configured -> 0
- Otherwise, defer to a run-time variable.
If PMAP_NEEDS_PTE_SYNC might evaluate to true (SA-1 only or run-time
check), then we also define PMAP_INCLUDE_PTE_SYNC so that e.g. assembly
code can include the necessary run-time support. PMAP_INCLUDE_PTE_SYNC
largely replaces the ARM32_PMAP_NEEDS_PTE_SYNC manual setting Steve
included with the original new pmap.
* In the new pmap, make pmap_pte_init_generic() check to see if the CPU
has a write-back cache. If so, init the PT cache mode to C=1,B=0 to get
write-through mode. Otherwise, init the PT cache mode to C=1,B=1.
* Add a new pmap_pte_init_arm8(). Old pmap, same as generic. New pmap,
sets page table cacheability to 0 (ARM8 has a write-back cache, but
flushing it is quite expensive).
* In the new pmap, make pmap_pte_init_arm9() reset the PT cache mode to
C=1,B=0, since the write-back check in generic gets it wrong for ARM9,
since we use write-through mode all the time on ARM9 right now. (What
this really tells me is that the test for write-through cache is less
than perfect, but we can fix that later.)
* Add a new pmap_pte_init_sa1(). Old pmap, same as generic. New pmap,
does generic initialization, then resets page table cache mode to
C=1,B=1, since C=1,B=0 does not produce write-through on the SA-1.
martin