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eea01fba3b
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21 Commits

Author SHA1 Message Date
Rafal Wojtczuk
eea01fba3b qmemman: in is_balance_req_significant(), account for Xen free memory 2010-09-16 16:00:07 +02:00
Rafal Wojtczuk
e476531b0e Leave XEN_FREE_MEM_LEFT of Xen free memory. 
Needed for driver domain, to be able to get contiguous memory for
its drivers.
 2010-09-16 15:57:11 +02:00
Rafal Wojtczuk
0c1f21a28e qmemman: when a AppVM is low on memory, allow small adjustments 
A small AppVM (say, with 100MB total) can go below prefmem, and
still not be assigned memory, because of the MIN_TOTAL_MEMORY_TRANSFER
threshold.
So, if AppVM is below prefmem, allow for smaller mem-sets.
 2010-09-10 11:35:30 +02:00
Rafal Wojtczuk
51e14fc8bb qmemman: trigger do_balance() on receiving /proc/meminfo data 2010-09-09 12:36:18 +02:00
Rafal Wojtczuk
f4e46b63a4 qmemman: in client code, set FD_CLOEXEC on qmmemman.socket 2010-09-09 12:33:48 +02:00
Rafal Wojtczuk
7545789a26 qmemman: now parse_meminfo takes a single argument 2010-09-09 11:30:02 +02:00
Rafal Wojtczuk
9c609a23bf qmemman: move /proc/meminfo parsing to qmemman_algo 
Just cosmetics, to make code layout more coherent.
 2010-09-09 11:24:04 +02:00
Rafal Wojtczuk
24b3baf063 qmemman: use 'Memtotal' from /proc/meminfo to calculate used memory 
Previously, memory_actual (retrieved from xen) was used; it can be inconsistent.
'Memtotal' can be spoofed, but anyway we rely on other fields from /proc/meminfo.
 2010-09-09 11:08:20 +02:00
Rafal Wojtczuk
5a33ed71ce qmemman: use the fact that balloon driver retries 
Apparently even if there is not enough xen memory to balloon up,
balloon driver will try to fulfill the request later, when
some memory is freed. Thus, in do_balloon, do not limit mem_set
to the available memory.
 2010-09-09 10:36:13 +02:00
Rafal Wojtczuk
87d1e973c7 qmemman: print balance stats only when updating 2010-09-09 10:29:35 +02:00
Rafal Wojtczuk
5be12f8459 qmemman: switch off memory balancing when doing xm save 
Apparently, it interferes:
INFO (XendCheckpoint:417) ERROR Internal error: Could not get vcpu context
INFO (XendCheckpoint:417) ERROR Internal error: Failed to map/save the p2m frame list
 2010-09-07 16:00:14 +02:00
Rafal Wojtczuk
11abef3439 qmemman: xc.domain_set_target_mem can throw exceptions, too 2010-09-07 13:10:48 +02:00
Rafal Wojtczuk
22df517425 qmemman: detect domain list change by watching /vm, not /local/domain 
The latter triggers on every memory/meminfo key update, which needlessly
adds xenstore requests.
 2010-09-06 10:46:36 +02:00
Rafal Wojtczuk
7dcb7cb196 qmemman: don't use xenapi, use hypercalls to do mem-set 2010-09-03 16:19:48 +02:00
Rafal Wojtczuk
10408d61db qmemman: when low on memory, do not make a VM go below prefmem 
Now the balance() has two different cases: enough memory and low_on_memory.
In the former, distribute memory proportianally; in the former, dont do this, as this
makes a VM go below prefmem.
 2010-09-01 12:40:02 +02:00
Rafal Wojtczuk
80771763cf qmemman: limit total memory transfer, not each one 2010-09-01 10:39:39 +02:00
Rafal Wojtczuk
c66e0848f3 qmemman: limit domain memory to 2G to workaround for xen xml-rpc limitation 
File "/usr/lib64/python2.6/xmlrpclib.py", line 710, in dump_int
    raise OverflowError, "int exceeds XML-RPC limits"
OverflowError: int exceeds XML-RPC limits
How crappy.
 2010-08-31 16:19:01 +02:00
Rafal Wojtczuk
de2619fbed qmemman: wrap xenapi.memset within try/except 
It can fail e.g. when a domain is being shutdown with a pretty
message like
 File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 1322, in setMemoryTarget
    (target * 1024))
Error: (1, 'Operation not permitted')
 2010-08-31 15:53:24 +02:00
Rafal Wojtczuk
eb6755e93c qmemman: fix locking 
We want balance() to wait on a lock even after balloon() has finished,
until socket client has closed.
 2010-08-30 14:50:48 +02:00
Rafal Wojtczuk
2eba4c1c15 I will test before commit. I will test before commit. I will... 2010-08-30 12:01:42 +02:00
Rafal Wojtczuk
62487c0f1e Memory management across VMs, first release 2010-08-30 11:40:19 +02:00