[PATCH] Fix powerpc compilation which was broken in 2.6.18.8 Christian Kaiser reported broken powerpc compilation due to 2.6.18.8 fix: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.18.y.git;a=commitdiff;h=f102c840f7f72492a83c93fa65396fe0edcf1df6In file included from drivers/media/video/pwc/pwc-uncompress.c:29:
include/asm/current.h: In function get_current:
include/asm/current.h:23: warning: implicit declaration of function offsetof
include/asm/current.h:23: error: expected expression before struct
make[4]: *** [drivers/media/video/pwc/pwc-uncompress.o] Error 1
make[3]: *** [drivers/media/video/pwc] Error 2
make[2]: *** [drivers/media...
[VE] rename local macro ADDR() to avoid conflict with XenFix redefinition of ADDR in veth.c.
macro with name ADDR is also used by Xen in include/asm/mach-xen/asm/synch_bitops.h.
[CPT] Fix possible deadlock in checkpointing of mmLearned it wrong once and did not relearn. anon_vma lock
cannot be taken under page table lock. And it is taken and
should be taken in reversed order, cpt_mm even has a special
hack due to wrong understanding: look at chunk converting ugly
spin_trylock to spin_lock.
Difference of previous version: in one case (does not happen normally,
but yet), page table lock could remain locked.
Bug #82785
[BC] ioprio: account for requests in driver Previously we didn't take into account beancounter's requests that are already in driver. Now we consider beancounter as empty (no requests in it) only if there are no requests in CFQ _and_ in driver.This patch improves fairness dramatically and fixes bug #81508
[PATCH] cfq: remove redundant cfq_find_next_crq() function callbackport prepared by Vasily Tarasov <vtaras@openvz.org>
mainstrem fix. cfq_find_next_crq() will be called later.
This fix is incorporated in
http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=21183b07ee4be405362af8454f3647781c77df1b
[CPT] handle killed system processes during checkpointing While checkpointing due to memory shortage CPT processes can be killed and tmpfs will not be saved.During restore we will see such errors:
CPT ERR: e0000002ef9c5000,111 :-2 mounting /dev/pts devpts 40000000
CPT ERR: e0000002ef9c5000,111 :rst_namespace: -2
Bug #79854
This happens as /dev is tmpfs now and its content was not saved during
checkpointing.
We need to check exit status of tar and iptables-save to be sure that they
exited normally.
Changes from v1:
- return -EINVAL in case of e...
[VZDQ] forced accounting for vzquota vzquota in GFS is implemented differently of one for ext3. Instead of atomic check-and-account, it makes checking first and, if at least one block can be added, it starts transaction, which makes strict accounting.We need two new methods:
1. Forced accounting is implemented by passing a special
value to alloc_space.
2. Quota checking also can be done in this way, but for
now it is implemnted as check-and-account for 1 block
and immediately free it. No modifications to vzquota core
required
[PATCH] Fix NFS client hard reset: split cl_dead flag Unfortunately, counter on RPC client counts only clones, but not real ussage. cl_dead flag leads to client destruction in rpc_release_client while it is really in use. So, we have to introduce a new flag with the meaning similar to cl_dead in all places except rpc_release_client. True recounting is too expensive.Based on idea from Dmitry Monakhov.
Bugs #82764, #82875
[VZDQ] Fix GFP_KERNEL allocation under spin lock in vzdq_aquot_buildmntlistSwitch allocation from GFP_KERNEL to GFP_ATOMIC under vfsmount_lock
in vzdq_aquot_buildmntlist()
[VZDQ] Trivial fix for vzaquota.group lookup"vzaquota.group" was memcmp'd for only 11 symbols,
allowing names like "vzaquota.grouX" to be looked up successfully.
[BC] dentry_cache: drain alien caches only when CONFIG_NUMA is setFix oops introduced by previous patch diff-ubc-dentry-free_alien-20070510:
Bug #82721
We should deal with NUMA only when CONFIG_NUMA is set.
[NFS] Compilation fix for diff-ve-nfs-stop-b-20070502 when built as module diff-ve-nfs-stop-20070502 requires some symbols to be exported.Signed-Off-By: Kirill Korotaev <dev@sw.ru>
[BC] compilation fix, i_private should be u.generic_ip in 2.6.18-mainstreamCompilation fix: unlike 2.6.20 and RHEL5 in 2.6.18-mainstream
i_private should be u.generic_ip
[PATCH] sysctl: add VE capability boundary set sysctl The user wishes to have virtualized kernel.cap-bound sysctl in order to use lcap tool to observe capabilities allowed in VE. We have cap_default field on ve_struct, that can be modified to be used as virtualized cap_bset. This patch: - renames cap_default -> ve_cap_bset - virtualizes cap_bset - introduces new proc and strategy routines to ha...http://bugzilla.openvz.org/show_bug.cgi?id=524
[VZDQ] sb->put_super can be NULL in valid cases put_super() superblock operation was not checked for NULL in vzquota leading to NULL dereference.http://bugzilla.openvz.org/show_bug.cgi?id=541
Bug #81936
[SCHED] optimization: dynamic vcpu_timeslicevcpu_timeslice == -1 now has special meaning (and -1 is default value
now). In this case, actual vcpu_timeslice value will depend on number of
VCPU's ready to run:
assume N = ready_vcpus / nr_pcpus
for N <= 1, vcpu_timeslice will be 8
1 < N <= 2, vcpu_timeslice = 4
2 < N <= 3, vcpu_timeslice = 2
3 < N <= 4, vcpu_timeslice = 1
N > 4, vcpu_timeslice = 0
[PATCH] dcache: move might_sleep() from under preempt_disable() dput() had might_sleep() check in the very beginning. After renaming to dput_recursive() and adding preempt_disable() call this check ended up in region with disabled preemption, so with CONFIG_DEBUG_SPINLOCK_SLEEP=y and preemption on dmesg gets heavily spammed.So, do might_sleep() check earlier.
[PATCH] dcache shrink optimizations (from mainstream) Backport of commit d52b908646b88cb1952ab8c9b2d4423908a23f11 Author: Miklos Szeredi <mszeredi@suse.cz> Date: Tue May 8 00:23:46 2007 -0700 fix quadratic behavior of shrink_dcache_parent()
The time shrink_dcache_parent() takes, grows quadratically with the depth
of the tree under 'parent'. This starts to get noticable at about 10,000.
These kinds of depths don't occur normally, and filesystems which invoke
shrink_dcache_parent() via d_invalidate() seem to have other depth
dependent timings, so it's not ev...
[PATCH] vzdquota: compilation fix for ppc32 While compiling on ppc32 the following error appears: Building modules, stage 2.
MODPOST
WARNING: "__cmpdi2" [fs/vzdquota.ko] undefined!
make[2]: *** [__modpost] Error 1
The problem is that switch((long_long_var)) is not
a primitive for ppc32 gcc: libgcc.a is needed,
which is out of the kernel.
The problem was noticed by mbaranzak user at forum
and he found the reason of it.
[PATCH] proc: don't hash task dentries in VE0 When task dies the proc dentries, that may be hashed are shrunk with shrink_dcache_parent(). The problem is that this routine doesn't guarantee that all the entries will be flushed and thus pid may still have reference from the appropriate inode.When we have such dentries in VE0 holding pids from ve
this leads to pid leakage and inability to release the
beancounter after ve stop.
So don't hash such dentries - remove them immediately.
Bug #80025
Signed-off-by: Pavel Emelianov <xemul@sw.ru>
[NFS] Remove warning: VFS is out of sync with lock managerBut keep it as a dprintk
The message can be generated in a quite normal situation:
If a 'lock' request is interrupted, then the lock client needs to
record that the server has the lock, incase it does.
When we come the unlock, the server might say it doesn't, even
though we think it does (or might) and this generates the message.
Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Trond...
[BC] cleanup: introcude top_beancounter helperMany resources are accounted to top beancounter only.
Introduce a helper to make code look nicer.
Signed-off-by: Pavel Emelianov <xemul@sw.ru>
Signed-off-by: Kirill Korotaev <dev@sw.ru>
[VE] unalias IPv6 iptables bit mask from IPv4 VE_IP_MANGLE flag is used as mask for both IPv4 and IPv6 modules which is no-no, because ip6table_mangle can be loaded after VE start.Split VE_IP_IPTABLES into VE_IP_IPTABLES and VE_IP_IPTABLES6.
Same for VE_IP_FILTER and VE_IP_MANGLE.
Choose numbers to not contradict with vzctl header.
Temporarily mirror VE_IP_IPTABLES into IPv6 mask.
When vzctl will start doing right thing, this mirroring can be dropped.
http://bugzilla.openvz.org/show_bug.cgi?id=561
[BC] dcache: drain alien caches on nodes on dcache acct on drain alien caches on nodes on dcache walking through dentry slabs lists when turning dcache accounting on/offBug #81116
[BC] dcache: pass correct node number to kmem_cache_free_block() Fix warning in slab_put_obj() in debug kernels due to incorrect node number passed to kmem_cache_free_block().Bug #81116
[CPT] kill all external processes on checkpoint We have a problem with external processes. If someone enters to VE forks and does some job w/o exec, then the process is not considered as external (pids are virtual), but some of the files (e.g. libs) can be from HN, i.e. external.Temporary and quick fix for this bug:
On suspend kill processes which have mm->vps_dumpable == 0.
Bug #81722
[BC] rework /proc/bc code Proc files creation suffered from two disadvantages: 1. It was racy in respect to bc remove/create 2. It couldn't correctly show hierarchical beancountersRework showing BC info by overriding readdir and lookup
methods for inodes under /proc/bc. The entry layout itself
is kept unchanged.
Plus create new entry names /proc/bc/<id>/debug to show
BC's id, parent credentials and some in-kernel memory
pointers purely for debugging.
Signed-off-by: Pavel Emelianov <xemul@sw.ru>
[VE] VE init signal delivery reworked to be similar to host Prevent VE init from receiving unexpected signals sent from VE including *fatal* ones. Signals sent from VE0 are still allowed, e.g. for fast VE stop. Fix for sys_reboot called from VE to force VE death (SIGKILL is sent in the context of VE).http://bugzilla.openvz.org/show_bug.cgi?id=533
[NFS] fix NFS auto-umount timeout sysctlThis patch:
- changes the timeout units from jiffies to seconds
- fixes assignment from userspace (was impossible, since UINT_MAX was treated as negative)
[CPT] Make kernel_thread_helper symbol global Make kernel_thread_helper symbol to be global so that it is possible to compile CPT built-in in kernel.http://bugzilla.openvz.org/show_bug.cgi?id=534
[CPT] too aggressive sys_futex() restartCheckpointing used to enforce restart of sys_futex even when
it returns -EINTR to workaround for sick return value of FUTEX_WAIT.
Of course, this is wrong (f.e. it means restart of timed FUTEX_WAIT
with original timeout :-(), but do not have much of choice if we do
not want to break everything.
At least one case can be relaxed. If we have signal pending,
when we restore we must not restart. Th...
[PATCH] PI futex oops (mainstream)Serialization in PI futexes is severely broken, lots of bugs, lots.
But only one is known which crashes kernel.
It is possible that new pi state isadded to pi_state_list
after the task did exit cleanup already. So that, when task
struct is released pi_state list remains in corrupted state.
Locally exploitable.
[PATCH] futex: PI state locking fixcommit 21778867b1c8e0feb567addb6dc0a7e2ca6ecdec
Author: Ingo Molnar <mingo@elte.hu>
Date: Fri Mar 16 13:38:31 2007 -0800
[PATCH] futex: PI state locking fix
Testing of -rt by IBM uncovered a locking bug in wake_futex_pi(): the PI
state needs to be locked before we access it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Chuck Ebbert <cebbert@...
[CPT] prevent changes of VM after VE was checkpointedIt is possible that processes' VM is changed after VE is checkpointed
and killed. At the moment it will happen when a process set clear_parent_tid
or robust list pointers. It was not considered a problem, because
VM is about to be destroyed in any case.
But one case was missed: corresponging VM areas could be mapped
to a file. If it is not deleted, the change will reach file system
and migrate...
[CPT] VE suspend cleanupsThe patch fixes one bug. Sometimes one process sleeps
in an uninterruptible state waiting for some event depending
on another process, which could be suspended.
I know three such cases:
1. Process did vfork() and waits when child will exec()
2. Thread did exec() and waits when its siblings will die.
3. Thread makes coredump and waits when siblings stop.
We detected case #1 directly by looki...
[PATCH] merging of async requests was abit incorrectly backported patch diff-ms-cfq-allow-merge-b-20070424 was ported a bit incorrectly. It resulted in wrong async requests merging.Bug #80857
OpenVZ team
