the descriptors set.
- In em_process_receive_interrupts(), call bus_dmamap_sync() for the
descriptors set each time we modify one descriptor, instead of doing it only
at the function exit, to make sure the adapters know he can re-use the
descriptor.
This helps on arm with write-back data cache (and possibly on other arches
with bounce pages, I don't know) under heavy network load. Without this,
if we attempt to process more than num_rx_desc descriptors, the adapter
would just stop processing rx interrupts.
While here, support up to four sections because it was trivial to do
and cheap. (One pointer per section).
For amd64 with "-fpic -shared" format .ko files, using a single PT_LOAD
section is important to avoid wasting about 1MB of KVM and physical ram
for the 'gap' between the two PT_LOAD sections. amd64 normally uses
.o format kld files and isn't affected normally. But -fpic -shared modules
are actually possible to produce and load... (And with a bugfix to
binutils, we can build and use plain -shared .ko files without -fpic)
i386 only wastes 4K per .ko file, so that isn't such a big deal there.
and fs.base. We always update pcb.pcb_gsbase and pcb.pcb_fsbase
when user wants to set them, in context switch routine, we only need to
write them into registers, we never have to read them out from registers
when thread is switched away. Since rdmsr is a serialization instruction,
micro benchmark shows it is worthy to do.
Reviewed by: peter, jhb
looked for in the system make file directory or in the specified
-m paths instead of always looking in the other -I and .PATH
specified paths. (Commit log shamelessly stolen from NetBSD.)
Reviewed by: yar
the range allowed by that function, resulting in undefined behaviour.
Our undefined behaviour in multibyte locales happened to differ from
glibc's, resulting in errors parsing option strings.
Obtained from: Corinna Vinschen (Red Hat)
the former is the ISA part, not the latter.
MFC After 6.0 is unfrozen (this bug doesn't exist in 6.0 because I didn't
MFC the rtl80x9 changes for ISA due to an error on my part)
cache_lookup() has returned a ref'ed and locked vnode since
vfs_cache.c:1.96, dated Tue Mar 29 12:59:06 2005 UTC. This change
is similar to the change made to smbfs_lookup() in smbfs_vnops.c:1.58.
Tested by: "Antony Mawer" ant AT mawer.org
MFC after: 2 weeks
I benchmarked this by simultaneously extracting 4 large tarballs (basically
world images) on a 4-processor AMD64 system, in a malloc-backed md.
With this patch, system time was reduced by 43%, and wall clock time by 33%.
Submitted by: jeff
MFC after: 1 week
cd9660_lookup() that was used to fix an actual race in ufs_lookup.c:1.78.
This is not currently a hazard, but the bug would be activated by
marking cd9660 as MPSAFE.
Requested by: bde
ext2_lookup() that was used to fix an actual race in ufs_lookup.c:1.78.
This is not currently a hazard, but the bug would be activated by
marking ext2fs as MPSAFE.
Requested by: bde
MFC after: 2 weeks
