- 09 Apr, 2009 1 commit
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Nathan Lynch authored
Freezing tasks via the cgroup freezer causes the load average to climb because the freezer's current implementation puts frozen tasks in uninterruptible sleep (D state). Some applications which perform job-scheduling functions consult the load average when making decisions. If a cgroup is frozen, the load average does not provide a useful measure of the system's utilization to such applications. This is especially inconvenient if the job scheduler employs the cgroup freezer as a mechanism for preempting low priority jobs. Contrast this with using SIGSTOP for the same purpose: the stopped tasks do not count toward system load. Change task_contributes_to_load() to return false if the task is frozen. This results in /proc/loadavg behavior that better meets users' expectations. Signed-off-by:
Nathan Lynch <ntl@pobox.com> Acked-by:
Andrew Morton <akpm@linux-foundation.org> Acked-by:
Nigel Cunningham <nigel@tuxonice.net> Tested-by:
Ingo Molnar <mingo@elte.hu>
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- 08 Apr, 2009 2 commits
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Ingo Molnar authored
Peter has become a co-maintainer of the scheduler during the last year, and Robert has become inactive - update the MAINTAINERS entry. Acked-by:
Peter Zijlstra <peterz@infradead.org> Signed-off-by:
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Ingo Molnar authored
Merge reason: update to latest upstream to queue up fix Signed-off-by:
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- 07 Apr, 2009 37 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds authored
* 'core/softlockup' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: softlockup: make DETECT_HUNG_TASK default depend on DETECT_SOFTLOCKUP softlockup: move 'one' to the softlockup section in sysctl.c softlockup: ensure the task has been switched out once softlockup: remove timestamp checking from hung_task softlockup: convert read_lock in hung_task to rcu_read_lock softlockup: check all tasks in hung_task softlockup: remove unused definition for spawn_softlockup_task softlockup: fix potential race in hung_task when resetting timeout softlockup: fix to allow compiling with !DETECT_HUNG_TASK softlockup: decouple hung tasks check from softlockup detection
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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: branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y branch tracer: Fix for enabling branch profiling makes sparse unusable ftrace: Correct a text align for event format output Update /debug/tracing/README tracing/ftrace: alloc the started cpumask for the trace file tracing, x86: remove duplicated #include ftrace: Add check of sched_stopped for probe_sched_wakeup function-graph: add proper initialization for init task tracing/ftrace: fix missing include string.h tracing: fix incorrect return type of ns2usecs() tracing: remove CALLER_ADDR2 from wakeup tracer blktrace: fix pdu_len when tracing packet command requests blktrace: small cleanup in blk_msg_write() blktrace: NUL-terminate user space messages tracing: move scripts/trace/power.pl to scripts/tracing/power.pl
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds authored
* 'irq/threaded' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: genirq: fix devres.o build for GENERIC_HARDIRQS=n genirq: provide old request_irq() for CONFIG_GENERIC_HARDIRQ=n genirq: threaded irq handlers review fixups genirq: add support for threaded interrupts to devres genirq: add threaded interrupt handler support
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Trond Myklebust authored
Commit c2ec175c ("mm: page_mkwrite change prototype to match fault") exposed a bug in the NFS implementation of page_mkwrite. We should be returning 0 on success... Signed-off-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: pci_slot: grab refcount on slot's bus PCI Hotplug: acpiphp: grab refcount on p2p subordinate bus PCI: allow PCI core hotplug to remove PCI root bus PCI: Fix oops in pci_vpd_truncate PCI: don't corrupt enable_cnt when doing manual resource alignment PCI: annotate pci_rescan_bus as __ref, not __devinit PCI-IOV: fix missing kernel-doc PCI: Setup disabled bridges even if buses are added PCI: SR-IOV quirk for Intel 82576 NIC
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git://git.kernel.dk/linux-2.6-blockLinus Torvalds authored
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: loop: mutex already unlocked in loop_clr_fd() cfq-iosched: don't let idling interfere with plugging block: remove unused REQ_UNPLUG cfq-iosched: kill two unused cfqq flags cfq-iosched: change dispatch logic to deal with single requests at the time mflash: initial support cciss: change to discover first memory BAR cciss: kernel scan thread for MSA2012 cciss: fix residual count for block pc requests block: fix inconsistency in I/O stat accounting code block: elevator quiescing helpers
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Linus Torvalds authored
The code that enables branch tracing for all (non-constant) branches plays games with the preprocessor and #define's the C 'if ()' construct to do tracing. That's all fine, but it fails for some unusual but valid C code that is sometimes used in macros, notably by the intel-iommu code: if (i=drhd->iommu, drhd->ignored) .. because now the preprocessor complains about multiple arguments to the 'if' macro. So make the macro expansion of this particularly horrid trick use varargs, and handle the case of comma-expressions in if-statements. Use another macro to do it cleanly in just one place. This replaces a patch by David (and acked by Steven) that did this all inside that one already-too-horrid macro. Tested-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6Linus Torvalds authored
* 'for-2.6.30' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6: ASoC: TWL4030: Compillation error fix
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (36 commits) ALSA: hda - Add VREF powerdown sequence for another board ALSA: oss - volume control for CSWITCH and CROUTE ALSA: hda - add missing comma in ad1884_slave_vols sound: usb-audio: allow period sizes less than 1 ms sound: usb-audio: save data packet interval in audioformat structure sound: usb-audio: remove check_hw_params_convention() sound: usb-audio: show sample format width in proc file ASoC: fsl_dma: Pass the proper device for dma mapping routines ASoC: Fix null dereference in ak4535_remove() ALSA: hda - enable SPDIF output for Intel DX58SO board ALSA: snd-atmel-abdac: increase periods_min to 6 instead of 4 ALSA: snd-atmel-abdac: replace bus_id with dev_name() ALSA: snd-atmel-ac97c: replace bus_id with dev_name() ALSA: snd-atmel-ac97c: cleanup registers when removing driver ALSA: snd-atmel-ac97c: do a proper reset of the external codec ALSA: snd-atmel-ac97c: enable interrupts to catch events for error reporting ALSA: snd-atmel-ac97c: set correct size for buffer hardware parameter ALSA: snd-atmel-ac97c: do not overwrite OCA and ICA when assigning channels ALSA: snd-atmel-ac97c: remove dead break statements after return in switch case ALSA: snd-atmel-ac97c: cleanup register definitions ...
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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: sata_mv: shorten register names sata_mv: workaround errata SATA#13 sata_mv: cosmetic renames sata_mv: workaround errata SATA#26 sata_mv: workaround errata PCI#7 sata_mv: replace 0x1f with ATA_PIO4 (v2) sata_mv: fix irq mask races sata_mv: revert SoC irq breakage libata: ahci enclosure management bios workaround ata: Add TRIM infrastructure ata_piix: VGN-BX297XP wants the controller power up on suspend libata: Remove some redundant casts from pata_octeon_cf.c pata_artop: typo
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git://aeryn.fluff.org.uk/bjdooks/linuxLinus Torvalds authored
* 'i2c-for-2630-v2' of git://aeryn.fluff.org.uk/bjdooks/linux: i2c: imx: Make disable_delay a per-device variable i2c: xtensa s6000 i2c driver powerpc/85xx: i2c-mpc: use new I2C bindings for the Socates board i2c: i2c-mpc: make I2C bus speed configurable i2c: i2c-mpc: use dev based printout function i2c: i2c-mpc: various coding style fixes i2c: imx: Add missing request_mem_region in probe() i2c: i2c-s3c2410: Initialise Samsung I2C controller early i2c-s3c2410: Simplify bus frequency calculation i2c-s3c2410: sda_delay should be in ns, not clock ticks i2c: iMX/MXC support
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git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds authored
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: hwmon: Add Asus ATK0110 support hwmon: (lm95241) Convert to new-style i2c driver
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Alan Cox authored
PCI parallel port devices can IRQ share so we should stop them hogging the line and making a mess on modern PC systems. We know the sharing side works as the PCMCIA driver has shared the parallel port IRQ for some time. Signed-off-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Breno Leitao authored
Here are some cleanups, mainly removing unused variables and silly declarations. Signed-off-by:
Breno Leitao <leitao@linux.vnet.ibm.com> Signed-off-by:
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Mike Frysinger authored
Signed-off-by:
Mike Frysinger <vapier.adi@gmail.com> Signed-off-by:
Bryan Wu <cooloney@kernel.org> Signed-off-by:
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Mike Frysinger authored
Depend on KGDB_SERIAL_CONSOLE being set to N rather than !Y, since it can be built as a module. Signed-off-by:
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Mike Frysinger authored
Signed-off-by:
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Sonic Zhang authored
Both software emulated and hardware based CTS and RTS are enabled in serial driver. The CTS RTS PIN connection on BF548 UART port is defined as a modem device not as a host device. In order to test it under Linux, please nake a cross UART cable to exchange CTS and RTS signal. Signed-off-by:
Sonic Zhang <sonic.zhang@analog.com> Signed-off-by:
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Sonic Zhang authored
Only the CTS bit is affected. Signed-off-by:
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Christian Pellegrin authored
(akpm: queued pending confirmation of the new major number) [randy.dunlap@oracle.com: select SERIAL_CORE] Signed-off-by:
Christian Pellegrin <chripell@fsfe.org> Signed-off-by:
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Alan Cox authored
This is a low density serial port so needs a real major/minor Signed-off-by:
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Alan Cox authored
Avoid using port->tty where possible (makes refcount fixing easier later). Remove unused code (the ioctl path is not used if the device has mget/mset functions) Remove various un-needed typecasts and long names so it could read it to do the changes. Signed-off-by:
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Claudio Scordino authored
Use the new general RS485 Linux data structure (introduced by Alan with commit number c26c56c0) in the Cris architecture too (currently, Cris still uses the old private data structure instead of the new one). Signed-off-by:
Claudio Scordino <claudio@evidence.eu.com> Tested-by:
Hinko Kocevar <hinko.kocevar@cetrtapot.si> Tested-by:
Janez Cufer <janez.cufer@cetrtapot.si> Signed-off-by:
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Adrian Bunk authored
tty_driver_kref_get() should be static inline and not extern inline (the latter even changed it's semantics in gcc >= 4.3). Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Miklos Szeredi authored
There's a possible deadlock in generic_file_splice_write(), splice_from_pipe() and ocfs2_file_splice_write(): - task A calls generic_file_splice_write() - this calls inode_double_lock(), which locks i_mutex on both pipe->inode and target inode - ordering depends on inode pointers, can happen that pipe->inode is locked first - __splice_from_pipe() needs more data, calls pipe_wait() - this releases lock on pipe->inode, goes to interruptible sleep - task B calls generic_file_splice_write(), similarly to the first - this locks pipe->inode, then tries to lock inode, but that is already held by task A - task A is interrupted, it tries to lock pipe->inode, but fails, as it is already held by task B - ABBA deadlock Fix this by explicitly ordering locks: the outer lock must be on target inode and the inner lock (which is later unlocked and relocked) must be on pipe->inode. This is OK, pipe inodes and target inodes form two nonoverlapping sets, generic_file_splice_write() and friends are not called with a target which is a pipe. Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Acked-by:
Mark Fasheh <mfasheh@suse.com> Acked-by:
Jens Axboe <jens.axboe@oracle.com> Cc: stable@kernel.org Signed-off-by:
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Ryusuke Konishi authored
After a review of user's feedback for finding out other compatibility issues, I found nilfs improperly initializes timestamps in inode; CURRENT_TIME was used there instead of CURRENT_TIME_SEC even though nilfs didn't have nanosecond timestamps on disk. A few users gave us the report that the tar program sometimes failed to expand symbolic links on nilfs, and it turned out to be the cause. Instead of applying the above displacement, I've decided to support nanosecond timestamps on this occation. Fortunetaly, a needless 64-bit field was in the nilfs_inode struct, and I found it's available for this purpose without impact for the users. So, this will do the enhancement and resolve the tar problem. Signed-off-by:
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by:
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Ryusuke Konishi authored
The former versions didn't have extra super blocks. This improves the weak point by introducing another super block at unused region in tail of the partition. This doesn't break disk format compatibility; older versions just ingore the secondary super block, and new versions just recover it if it doesn't exist. The partition created by an old mkfs may not have unused region, but in that case, the secondary super block will not be added. This doesn't make more redundant copies of the super block; it is a future work. Signed-off-by:
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Ryusuke Konishi authored
will reduce some lines of segment constructor. Previously, the state was complexly controlled through a list of segments in order to keep consistency in meta data of usage state of segments. Instead, this presents ``calculated'' active flags to userland cleaner program and stop maintaining its real flag on disk. Only by this fake flag, the cleaner cannot exactly know if each segment is reclaimable or not. However, the recent extension of nilfs_sustat ioctl struct (nilfs2-extend-nilfs_sustat-ioctl-struct.patch) can prevent the cleaner from reclaiming in-use segment wrongly. So, now I can apply this for simplification. Signed-off-by:
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Ryusuke Konishi authored
Nilfs creates checkpoints even for garbage collection or metadata updates such as checkpoint mode change. So, user often sees checkpoints created only by such internal operations. This is inconvenient in some situations. For example, application that monitors checkpoints and changes them to snapshots, will fall into an infinite loop because it cannot distinguish internally created checkpoints. This patch solves this sort of problem by adding a flag to checkpoint for identification. Signed-off-by:
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Ryusuke Konishi authored
The sketch file is a file to mark checkpoints with user data. It was experimentally introduced in the original implementation, and now obsolete. The file was handled differently with regular files; the file size got truncated when a checkpoint was created. This stops the special treatment and will treat it as a regular file. Most users are not affected because mkfs.nilfs2 no longer makes this file. Signed-off-by:
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Ryusuke Konishi authored
This adds a missing endian conversion of checksum field in the super block. This fixes compatibility issue on big endian machines which will come to surface after supporting recovery of super block. Signed-off-by:
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Ryusuke Konishi authored
Pekka Enberg advised me: > It would be nice if BUG(), BUG_ON(), and panic() calls would be > converted to proper error handling using WARN_ON() calls. The BUG() > call in nilfs_cpfile_delete_checkpoints(), for example, looks to be > triggerable from user-space via the ioctl() system call. This will follow the comment and keep them to a minimum. Acked-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Ryusuke Konishi authored
This adds a new argument to the nilfs_sustat structure. The extended field allows to delete volatile active state of segments, which was needed to protect freshly-created segments from garbage collection but has confused code dealing with segments. This extension alleviates the mess and gives room for further simplifications. The volatile active flag is not persistent, so it's eliminable on this occasion without affecting compatibility other than the ioctl change. Signed-off-by:
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Ryusuke Konishi authored
Pekka Enberg suggested converting ->ioctl operations to use ->unlocked_ioctl to avoid BKL. The conversion was verified to be safe, so I will take it on this occasion. Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Ryusuke Konishi authored
This removes compat code from the nilfs ioctls and applies the same function for both .ioctl and .compat_ioctl file operations. Signed-off-by:
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Ryusuke Konishi authored
Nilfs ioctl had structures not having fixed sized types such as: struct nilfs_argv { void *v_base; size_t v_nmembs; size_t v_size; int v_index; int v_flags; }; Further, some of them are wrongly aligned: e.g. struct nilfs_cpmode { __u64 cm_cno; int cm_mode; }; The size of wrongly aligned structures varies depending on architectures, and it breaks the identity of ioctl commands, which leads to arch dependent errors. Previously, these are compensated by using compat_ioctl. This fixes these problems and allows removal of compat ioctl. Since this will change sizes of those structures, binary compatibility for the past utilities will once break; new utilities have to be used instead. However, it would be helpful to avoid platform dependent problems in the long term. Signed-off-by:
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