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to free some for use on the rx rings on network cards.
this modifies m_cluncount to advise callers when we're in such a
situation, and makes them responsible for freeing up the cluster
for allocation by MCLGETI later.
fixes an awesome lockup with sis(4) henning has been experiencing.
this is not the best fix, but it is better than the current situation.
yep deraadt@ tested by henning@
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inline the loop in the one place it exists, and remove it from uvm
adjust a comment mentioning it accordingly
originally inspired by a diff fixing a comment from oga@
ok art@ beck@ miod@ oga@
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ok dlg thib
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to the per-ipf mbuf cluster reference counters
ok dlg claudio
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just use strings and make things unique.
ok claudio@
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functions are called, which will turn off DMA. Receiving packets into
your memory after a system reboot is pretty nasty. This will also mean
that the shutdown hooks can go; this solution is smaller.
ok henning miod dlg kettenis
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that case.
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the chain
ok henning
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things to softraid.
ok jsing thib krw beck oga
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ok beck@, dlg@
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the most common operation is checking for a particular tag to be there.
in the majority of the cases it is not.
introduce a "tagsset" in the mbuf packet header which has a bit for
each mbuf tag type that is in the chain set, checking for its existance
is now as easy and cheap as (tagsset & type) != 0. theo ok
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thinks they could be available via multiple paths. those stolen
devices are then made available via mpath(4).
this is the minimum amount of code to implement the stealing. it
is generally broken and very brittle, so it is currently disabled.
it is going in so i can work on it in the tree.
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this lets m_freem() only do one splnet/splx instead of repeating this all
the way down a chain
ok henning claudio dlg
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reducing the amount of splnet/splx dancing required.. especially in the
worst case (of m_cldrop)
ok dlg kettenis damien
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No longer allocate a static amount of memory for messages in MD
boot path; message queues, message metadata, and message data now
all use dynamic memory, which means that runtime sysctls should now
be trivial to implement.
Since I'm going to be around all week to fix any breakage, this should
probably just go in now.
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1) fix buffer cache low water mark to allow for extremely low memory machines
without dying
2) Add "show bcstats" to ddb to allow for looking at the buffer cache statistics in ddb
ok art@ oga@
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Now instead of the global object hashtable, we have a per object tree.
Testing shows no performance difference and a slight code shrink. OTOH when
locking is more fine grained this should be faster due to lock contention on
uvm.hashlock.
ok thib@, art@.
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ok dlg@
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after c2k9
allows buffer cache to be extended and grow/shrink dynamically
tested by many, ok oga@, "why not just commit it" deraadt@
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Man page bits adapted from FreeBSD. OK miod@
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Change to void function.
Also, no need to have global tty stats pointer, so just return it
from clalloc, as the caller frees it immediately anyway.
ok miod@
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which is exactly what the macro does.
Macro's that are nothing more then:
#define FUNCTION(arg) function(arg)
are almost always pointless and should go away.
OK blambert@
Agreed by many.
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where doing bremfree() befure calling buf_acquire().
This is causing us headache pinning down a bug that showed up
when deraadt@ too cvs to current, and will have to be done
anyway as a preperation for backouts.
OK deraadt@
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waiting for all the workqs to die wakeup more often than
it should have.
ok dlg@ tedu@
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receive SIGCHLD twice if scheduled before the reaper runs. diff by
guenther@ and myself. okay guenther@ deraadt@
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addition of rdomain to struct pkthdr.
"Doh!" claudio@
ok henning@
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have been going on. this appears to bring us back to stable state.
lots of testing by oga and ariane and my self.
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separately).
a change at or just before the hackathon has either exposed or added a
very very nasty memory corruption bug that is giving us hell right now.
So in the interest of kernel stability these diffs are being backed out
until such a time as that corruption bug has been found and squashed,
then the ones that are proven good may slowly return.
a quick hitlist of the main commits this backs out:
mine:
uvm_objwire
the lock change in uvm_swap.c
using trees for uvm objects instead of the hash
removing the pgo_releasepg callback.
art@'s:
putting pmap_page_protect(VM_PROT_NONE) in uvm_pagedeactivate() since
all callers called that just prior anyway.
ok beck@, ariane@.
prompted by deraadt@.
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is how sysctl finds them, so it can *never* be renumbered again, and must
stay
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three
commits:
1) The sysctl allowing bufcachepercent to be changed at boot time.
2) The change moving the buffer cache hash chains to a red-black tree
3) The dynamic buffer cache (Which depended on the earlier too).
ok on the backout from marco and todd
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indicates that writedisklabel is trying to find the location for writing
the label. If the lp is messed with, an invalid checksum is written.
done with miod and kettenis, lots of moaning and gnashing of teeth, etc
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*and* PR_ZERO in flags, you will no longer zero our your nicely
constructed object.
Instead, now if you have a contructor set, and you set PR_ZERO, you will
panic (it's invalid due to how constructor work).
ok miod@ deraadt@ on earlier versions of the diff. ok tedu@ after he
pointed out a couple of places I messed up.
Problem initally noticed by ariane@ a while ago.
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(just a noop since that doesn't matter in userland).
Pointed out by a couple of people, thanks.
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and it is pretty critical so commiting it now. Any more fallout from
the code 'simplication'?
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along with vnode type-specific info to make it more useful for fstat(1).
OK deraadt@
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media just a wee bit too much.
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Just put it in the buf_acquire function.
oga@ ok
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ok millert
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This commit won't change the default behaviour of the system unless the
buffer cache size is increased with sysctl kern.bufcachepercent. By default
our buffer cache is 10% of memory, which with this commit is now treated
as a low water mark. If the buffer cache size is increased, the new size
is treated as a high water mark and the buffer cache is permitted to grow
to that percentage of memory.
If the page daemon is invoked, the page daemon will ask the buffer cache
to relenquish pages. if the buffer cache has more than the low water mark it
will relenquish pages allowing them to be consumed by uvm. after a short
period the buffer cache will attempt to re-grow back to the high water mark.
This permits the use of a large buffer cache without penalizing the available
memory for other purposes.
Above the low water mark the buffer cache remains entirely subservient to
the page daemon, so if uvm requires pages, the buffer cache will abandon
them.
ok art@ thib@ oga@
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OK miod
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still do the right thing if the MBR has a lie in it
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alternate routing table and separate them from other interfaces in distinct
routing tables. The same network can now be used in any doamin at the same
time without causing conflicts.
This diff is mostly mechanical and adds the necessary rdomain checks accross
net and netinet. L2 and IPv4 are mostly covered still missing pf and IPv6.
input and tested by jsg@, phessler@ and reyk@. "put it in" deraadt@
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