- 29 Oct, 2008 6 commits
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Jason Baron authored
In testing 2.6.28-rc1, I found that passing 'dynamic_printk' on the command line didn't activate the debug code. The problem is that dynamic_printk_setup() (which activates the debugging) is being called before dynamic_printk_init() is called (which initializes infrastructure). Fix this by setting setting the state to 'DYNAMIC_ENABLED_ALL' in dynamic_printk_setup(), which will also cause all subsequent modules to have debugging automatically started, which is probably the behavior we want. Signed-off-by:
Jason Baron <jbaron@redhat.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Tsugikazu Shibata authored
Sync the jp_JP version of HOWTO to contain the latest updates From: Tsugikazu Shibata <tshibata@ab.jp.nec.com> Signed-off-by: -
Josh Boyer authored
Update the documentation for the stable tree rules to reflect that device IDs and quirks are also suitable for -stable kernels. Signed-off-by:
Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by:
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Andi Kleen authored
SYSFS: Fix return values for sysdev_store_{ulong,int} Always return the full size instead of the consumed length of the string in sysdev_store_{ulong,int} This avoids EINVAL errors in some echo versions. Signed-off-by:Andi Kleen <ak@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by:
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Qinghuang Feng authored
There are no functions named sys_device_shutdown or sys_device_suspend in the kernel. They should be fixed to sysdev_shutdown and sysdev_suspend respectively. Signed-off-by:
Qinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by:
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Greg Kroah-Hartman authored
This fills in the documentation for all of the current kernel taint flags, and fixes the number for TAINT_CRAP, which was incorrectly described. Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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- 28 Oct, 2008 34 commits
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Linus Torvalds authored
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (31 commits) ftrace: fix current_tracer error return tracing: fix a build error on alpha ftrace: use a real variable for ftrace_nop in x86 tracing/ftrace: make boot tracer select the sched_switch tracer tracepoint: check if the probe has been registered asm-generic: define DIE_OOPS in asm-generic trace: fix printk warning for u64 ftrace: warning in kernel/trace/ftrace.c ftrace: fix build failure ftrace, powerpc, sparc64, x86: remove notrace from arch ftrace file ftrace: remove ftrace hash ftrace: remove mcount set ftrace: remove daemon ftrace: disable dynamic ftrace for all archs that use daemon ftrace: add ftrace warn on to disable ftrace ftrace: only have ftrace_kill atomic ftrace: use probe_kernel ftrace: comment arch ftrace code ftrace: return error on failed modified text. ftrace: dynamic ftrace process only text section ...
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git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvmLinus Torvalds authored
* 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: ia64: Makefile fix for forcing to re-generate asm-offsets.h KVM: Future-proof device assignment ABI KVM: ia64: Fix halt emulation logic KVM: Fix guest shared interrupt with in-kernel irqchip KVM: MMU: sync root on paravirt TLB flush
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Linus Torvalds authored
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: lockdep: fix irqs on/off ip tracing lockdep: minor fix for debug_show_all_locks() x86: restore the old swiotlb alloc_coherent behavior x86: use GFP_DMA for 24bit coherent_dma_mask swiotlb: remove panic for alloc_coherent failure xen: compilation fix of drivers/xen/events.c on IA64 xen: portability clean up and some minor clean up for xencomm.c xen: don't reload cr3 on suspend kernel/resource: fix reserve_region_with_split() section mismatch printk: remove unused code from kernel/printk.c
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Linus Torvalds authored
Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: irq: make variable static
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Linus Torvalds authored
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: fix documentation reference for sched_min_granularity_ns sched: virtual time buddy preemption sched: re-instate vruntime based wakeup preemption sched: weaken sync hint sched: more accurate min_vruntime accounting sched: fix a find_busiest_group buglet sched: add CONFIG_SMP consistency
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Linus Torvalds authored
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, memory hotplug: remove wrong -1 in calling init_memory_mapping() x86: keep the /proc/meminfo page count correct x86/uv: memory allocation at initialization xen: fix Xen domU boot with batched mprotect
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git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds authored
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] s390: Fix build for !CONFIG_S390_GUEST + CONFIG_VIRTIO_CONSOLE [S390] No more 4kb stacks. [S390] Change default IPL method to IPL_VM. [S390] tape: disable interrupts in tape_open and tape_release [S390] appldata: unsigned ops->size cannot be negative [S390] tape block: complete request with correct locking [S390] Fix sysdev class file creation. [S390] pgtables: Fix race in enable_sie vs. page table ops [S390] qdio: remove incorrect memset [S390] qdio: prevent double qdio shutdown in case of I/O errors
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-devLinus Torvalds authored
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: libata: ahci enclosure management bit mask libata: ahci enclosure management led sync pata_ninja32: suspend/resume support libata: Fix LBA48 on pata_it821x RAID volumes. libata: clear saved xfer_mode and ncq_enabled on device detach sata_sil24: configure max read request size to 4k libata: add missing kernel-doc libata: fix device iteration bugs ahci: Add support for Promise PDC42819 ata: Switch all my stuff to a common address
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Steven Rostedt authored
The commit (in linux-tip) c2931e05 ( ftrace: return an error when setting a nonexistent tracer ) added useful code that would error when a bad tracer was written into the current_tracer file. But this had a bug if the amount written was more than the amount read by that code. The first iteration would set the tracer correctly, but since it did not consume the rest of what was written (usually whitespace), the userspace utility would continue to write what was not consumed. This second iteration would fail to find a tracer and return -EINVAL. Funny thing is that the tracer would have already been set. This patch just consumes all the data that is written to the file. Signed-off-by:
Steven Rostedt <srostedt@redhat.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Xiantao Zhang authored
To avoid using stale asm-offsets.h. Signed-off-by:
Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by:
Avi Kivity <avi@redhat.com>
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Avi Kivity authored
Reserve some space so we can add more data. Signed-off-by:Avi Kivity <avi@qumranet.com>
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Xiantao Zhang authored
Common halt logic was changed by x86 and did not update ia64. This patch updates halt for ia64. Fixes a regression causing guests to hang with more than 2 vcpus. Signed-off-by:
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Sheng Yang authored
Every call of kvm_set_irq() should offer an irq_source_id, which is allocated by kvm_request_irq_source_id(). Based on irq_source_id, we identify the irq source and implement logical OR for shared level interrupts. The allocated irq_source_id can be freed by kvm_free_irq_source_id(). Currently, we support at most sizeof(unsigned long) different irq sources. [Amit: - rebase to kvm.git HEAD - move definition of KVM_USERSPACE_IRQ_SOURCE_ID to common file - move kvm_request_irq_source_id to the update_irq ioctl] [Xiantao: - Add kvm/ia64 stuff and make it work for kvm/ia64 guests] Signed-off-by:Sheng Yang <sheng@linux.intel.com> Signed-off-by:
Amit Shah <amit.shah@redhat.com> Signed-off-by:
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Marcelo Tosatti authored
The pvmmu TLB flush handler should request a root sync, similarly to a native read-write CR3. Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
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Heiko Carstens authored
Impact: fix lockdep lock-api-caller output when irqsoff tracing is enabled 81d68a96 "ftrace: trace irq disabled critical timings" added wrappers around trace_hardirqs_on/off_caller. However these functions use __builtin_return_address(0) to figure out which function actually disabled or enabled irqs. The result is that we save the ips of trace_hardirqs_on/off instead of the real caller. Not very helpful. However since the patch from Steven the ip already gets passed. So use that and get rid of __builtin_return_address(0) in these two functions. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Christian Borntraeger authored
The s390 kernel does not compile if virtio console is enabled, but guest support is disabled: LD .tmp_vmlinux1 arch/s390/kernel/built-in.o: In function `setup_arch': /space/linux-2.5/arch/s390/kernel/setup.c:773: undefined reference to `s390_virtio_console_init' The fix is related to commit 99e65c92 Author: Christian Borntraeger <borntraeger@de.ibm.com> Date: Fri Jul 25 15:50:04 2008 +0200 KVM: s390: Fix guest kconfig Which changed the build process to build kvm_virtio.c only if CONFIG_S390_GUEST is set. We must ifdef the prototype in the header file accordingly. Reported-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
We got a stack overflow with a small stack configuration on a 32 bit system. It just looks like as 4kb isn't enough and too dangerous. So lets get rid of 4kb stacks on 32 bit. But one thing I completely dislike about the call trace below is that just for debugging or tracing purposes sprintf gets called (cio_start_key): /* process condition code */ sprintf(dbf_txt, "ccode:%d", ccode); CIO_TRACE_EVENT(4, dbf_txt); But maybe its just me who thinks that this could be done better. <4>Kernel stack overflow. <4>Modules linked in: dm_multipath sunrpc bonding qeth_l2 dm_mod qeth ccwgroup vmur <4>CPU: 1 Not tainted 2.6.27-30.x.20081015-s390default #1 <4>Process httpd (pid: 3807, task: 20ae2df8, ksp: 1666fb78) <4>Krnl PSW : 040c0000 8027098a (number+0xe/0x348) <4> R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:0 CC:0 PM:0 <4>Krnl GPRS: 00d43318 0027097c 1666f277 9666f270 <4> 00000000 00000000 0000000a ffffffff <4> 9666f270 1666f228 1666f277 1666f098 <4> 00000002 80270982 80271016 1666f098 <4>Krnl Code: 8027097e: f0340dd0a7f1 srp 3536(4,%r0),2033(%r10),4 <4> 80270984: 0f00 clcl %r0,%r0 <4> 80270986: a7840001 brc 8,80270988 <4> >8027098a: 18ef lr %r14,%r15 <4> 8027098c: a7faff68 ahi %r15,-152 <4> 80270990: 18bf lr %r11,%r15 <4> 80270992: 18a2 lr %r10,%r2 <4> 80270994: 1893 lr %r9,%r3 Modified calltrace with annotated stackframe size of each function: stackframe size | 0 304 vsnprintf+850 [0x271016] 1 72 sprintf+74 [0x271522] 2 56 cio_start_key+262 [0x2d4c16] 3 56 ccw_device_start_key+222 [0x2dfe92] 4 56 ccw_device_start+40 [0x2dff28] 5 48 raw3215_start_io+104 [0x30b0f8] 6 56 raw3215_write+494 [0x30ba0a] 7 40 con3215_write+68 [0x30bafc] 8 40 __call_console_drivers+146 [0x12b0fa] 9 32 _call_console_drivers+102 [0x12b192] 10 64 release_console_sem+268 [0x12b614] 11 168 vprintk+462 [0x12bca6] 12 72 printk+68 [0x12bfd0] 13 256 __print_symbol+50 [0x15a882] 14 56 __show_trace+162 [0x103d06] 15 32 show_trace+224 [0x103e70] 16 48 show_stack+152 [0x103f20] 17 56 dump_stack+126 [0x104612] 18 96 __alloc_pages_internal+592 [0x175004] 19 80 cache_alloc_refill+776 [0x196f3c] 20 40 __kmalloc+258 [0x1972ae] 21 40 __alloc_skb+94 [0x328086] 22 32 pskb_copy+50 [0x328252] 23 32 skb_realloc_headroom+110 [0x328a72] 24 104 qeth_l2_hard_start_xmit+378 [0x7803bfde] 25 56 dev_hard_start_xmit+450 [0x32ef6e] 26 56 __qdisc_run+390 [0x3425d6] 27 48 dev_queue_xmit+410 [0x331e06] 28 40 ip_finish_output+308 [0x354ac8] 29 56 ip_output+218 [0x355b6e] 30 24 ip_local_out+56 [0x354584] 31 120 ip_queue_xmit+300 [0x355cec] 32 96 tcp_transmit_skb+812 [0x367da8] 33 40 tcp_push_one+158 [0x369fda] 34 112 tcp_sendmsg+852 [0x35d5a0] 35 240 sock_sendmsg+164 [0x32035c] 36 56 kernel_sendmsg+86 [0x32064a] 37 88 sock_no_sendpage+98 [0x322b22] 38 104 tcp_sendpage+70 [0x35cc1e] 39 48 sock_sendpage+74 [0x31eb66] 40 64 pipe_to_sendpage+102 [0x1c4b2e] 41 64 __splice_from_pipe+120 [0x1c5340] 42 72 splice_from_pipe+90 [0x1c57e6] 43 56 generic_splice_sendpage+38 [0x1c5832] 44 48 do_splice_from+104 [0x1c4c38] 45 48 direct_splice_actor+52 [0x1c4c88] 46 80 splice_direct_to_actor+180 [0x1c4f80] 47 72 do_splice_direct+70 [0x1c5112] 48 64 do_sendfile+360 [0x19de18] 49 72 sys_sendfile64+126 [0x19df32] 50 336 sysc_do_restart+18 [0x111a1a] Signed-off-by: -
Heiko Carstens authored
allyesconfig and allmodconfig built kernels have a tape IPL record. A the vmreader record makes much more sense, since hardly anybody will ever IPL a kernel from tape. So change the default. As I side effect I can test these kernels without fiddling around with the kernel config ;) Signed-off-by:
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Frank Munzert authored
Get tape device lock with interrupts disabled. Otherwise lockdep will issue a warning similar to: ================================= [ INFO: inconsistent lock state ] 2.6.27 #1 --------------------------------- inconsistent {in-hardirq-W} -> {hardirq-on-W} usage. vol_id/2903 [HC0[0]:SC0[0]:HE1:SE1] takes: (sch->lock){++..}, at: [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] {in-hardirq-W} state was registered at: [<000000000007ce5c>] __lock_acquire+0x894/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<0000000000202264>] do_IRQ+0x124/0x1f0 [<0000000000026610>] io_return+0x0/0x8 irq event stamp: 847 hardirqs last enabled at (847): [<000000000007aca6>] trace_hardirqs_on+0x2a/0x38 hardirqs last disabled at (846): [<0000000000076ca2>] trace_hardirqs_off+0x2a/0x38 softirqs last enabled at (0): [<000000000004909e>] copy_process+0x43e/0x11f4 softirqs last disabled at (0): [<0000000000000000>] 0x0 other info that might help us debug this: 1 lock held by vol_id/2903: #0: (&bdev->bd_mutex){--..}, at: [<000000000010e0f4>] do_open+0x78/0x358 stack backtrace: CPU: 1 Not tainted 2.6.27 #1}, Process vol_id (pid: 2903, task: 000000003d4c0000, ksp: 000000003d4e3b10) 0400000000000000 000000003d4e3830 0000000000000002 0000000000000000 000000003d4e38d0 000000003d4e3848 000000003d4e3848 00000000000168a8 0000000000000000 000000003d4e3b10 0000000000000000 0000000000000000 000000003d4e3830 000000000000000c 000000003d4e3830 000000003d4e38a0 000000000034aa98 00000000000168a8 000000003d4e3830 000000003d4e3880 Call Trace: ([<000000000001681c>] show_trace+0x138/0x158) [<0000000000016902>] show_stack+0xc6/0xf8 [<00000000000170d4>] dump_stack+0xb0/0xc0 [<0000000000078810>] print_usage_bug+0x1e8/0x228 [<000000000007a71c>] mark_lock+0xb14/0xd24 [<000000000007cd5a>] __lock_acquire+0x792/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] [<000003e00005185c>] tapeblock_open+0x98/0xd0 [tape] Signed-off-by:Frank Munzert <munzert@de.ibm.com> Signed-off-by:
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Roel Kluin authored
unsigned ops->size cannot be negative Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Signed-off-by:
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Frank Munzert authored
__blk_end_request must be called with request queue lock held. We need to use blk_end_request rather than __blk_end_request. Signed-off-by:
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Heiko Carstens authored
Use sysdev_class_create_file() to create create sysdev class attributes instead of sysfs_create_file(). Using sysfs_create_file() wasn't a very good idea since the show and store functions have a different amount of parameters for sysfs files and sysdev class files. In particular the pointer to the buffer is the last argument and therefore accesses to random memory regions happened. Still worked surprisingly well until we got a kernel panic. Cc: stable@kernel.org Signed-off-by:
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Christian Borntraeger authored
The current enable_sie code sets the mm->context.pgstes bit to tell dup_mm that the new mm should have extended page tables. This bit is also used by the s390 specific page table primitives to decide about the page table layout - which means context.pgstes has two meanings. This can cause any kind of bugs. For example - e.g. shrink_zone can call ptep_clear_flush_young while enable_sie is running. ptep_clear_flush_young will test for context.pgstes. Since enable_sie changed that value of the old struct mm without changing the page table layout ptep_clear_flush_young will do the wrong thing. The solution is to split pgstes into two bits - one for the allocation - one for the current state Signed-off-by:
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Jan Glauber authored
Remove the memset since zeroing the string is not needed and use snprintf instead of sprintf. Signed-off-by:
Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by:
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Jan Glauber authored
In case of I/O errors on a qdio subchannel qdio_shutdown may be called twice by the qdio driver and by zfcp. Remove the superfluous shutdown from qdio and let the upper layer driver handle the error condition. Signed-off-by:
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qinghuang feng authored
When we failed to get tasklist_lock eventually (count equals 0), we should only print " ignoring it.\n", and not print " locked it.\n" needlessly. Signed-off-by:
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Frederic Weisbecker authored
Impact: build fix on Alpha When tracing is enabled, some arch have included <linux/irqflags.h> on their <asm/system.h> but others like alpha or m68k don't. Build error on alpha: kernel/trace/trace.c: In function 'tracing_cpumask_write': kernel/trace/trace.c:2145: error: implicit declaration of function 'raw_local_irq_disable' kernel/trace/trace.c:2162: error: implicit declaration of function 'raw_local_irq_enable' Tested on Alpha through a cross-compiler (should correct a similar issue on m68k). Reported-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by:
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Shaohua Li authored
Impact: fix crash with memory hotplug Shuahua Li found: | I just did some experiments on a desktop for memory hotplug and this bug | triggered a crash in my test. | | Yinghai's suggestion also fixed the bug. We don't need to round it, just remove that extra -1 Signed-off-by:
Yinghai <yinghai@kernel.org> Signed-off-by:
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David Milburn authored
Enclosure management bit mask definitions. Signed-off-by:
David Milburn <dmilburn@redhat.com> Signed-off-by:
Jeff Garzik <jgarzik@redhat.com>
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David Milburn authored
Synchronize ahci_sw_activity and ahci_sw_activity_blink with ata_port lock. Signed-off-by:
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Alan Cox authored
I had assumed that the standard recovery would be sufficient for this hardware but it isn't. Fix up the other registers on resume as needed. See bug #11735 Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Ondrej Zary authored
[http://lkml.org/lkml/2008/10/18/82] Signed-off-by:
Ondrej Zary <linux@rainbow-software.org> Acked-by:
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Tejun Heo authored
libata EH saves xfer_mode and ncq_enabled at start to later set DUBIOUS_XFER flag if it has changed. These values need to be cleared on device detach such that hot device swap doesn't accidentally miss DUBIOUS_XFER. Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Tejun Heo authored
Due to request posting limitations, bandwidth of sil3132 is limited to around 120MB/s with the minimum pci-e payload size (128bytes) which is used by most consumer systems. However, write throughput can be slightly (~3%) increased by increasing the max read requeset size. Configure it to 4k which is the maximum supported. This optimization is also done by SIMG's windows driver. Signed-off-by:
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