Revision 1d9e2ae949411c2f329f30e01ea0355cd02c4296 authored by Chris Mason on 16 January 2009, 16:58:19 UTC, committed by Chris Mason on 16 January 2009, 16:58:19 UTC
Btrfs maintains a queue of async bio submissions so the checksumming threads don't have to wait on get_request_wait. In order to avoid extra wakeups, this code has a running_pending flag that is used to tell new submissions they don't need to wake the thread. When the threads notice congestion on a single device, they may decide to requeue the job and move on to other devices. This makes sure the running_pending flag is cleared before the job is requeued. It should help avoid IO stalls by making sure the task is woken up when new submissions come in. Signed-off-by: Chris Mason <chris.mason@oracle.com>
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| File | Mode | Size |
|---|---|---|
| ABI | ||
| DocBook | ||
| PCI | ||
| RCU | ||
| accounting | ||
| acpi | ||
| aoe | ||
| arm | ||
| auxdisplay | ||
| blackfin | ||
| block | ||
| blockdev | ||
| cdrom | ||
| cgroups | ||
| connector | ||
| console | ||
| controllers | ||
| cpu-freq | ||
| cpuidle | ||
| cris | ||
| crypto | ||
| development-process | ||
| device-mapper | ||
| driver-model | ||
| dvb | ||
| early-userspace | ||
| fault-injection | ||
| fb | ||
| filesystems | ||
| firmware_class | ||
| frv | ||
| hwmon | ||
| i2c | ||
| i2o | ||
| ia64 | ||
| ide | ||
| infiniband | ||
| input | ||
| ioctl | ||
| isdn | ||
| ja_JP | ||
| kbuild | ||
| kdump | ||
| ko_KR | ||
| laptops | ||
| lguest | ||
| m68k | ||
| make | ||
| mips | ||
| mn10300 | ||
| mtd | ||
| namespaces | ||
| netlabel | ||
| networking | ||
| parisc | ||
| pcmcia | ||
| power | ||
| powerpc | ||
| prctl | ||
| s390 | ||
| scheduler | ||
| scsi | ||
| serial | ||
| sh | ||
| sound | ||
| sparc | ||
| spi | ||
| sysctl | ||
| telephony | ||
| thermal | ||
| timers | ||
| tracers | ||
| uml | ||
| usb | ||
| video4linux | ||
| vm | ||
| w1 | ||
| watchdog | ||
| x86 | ||
| zh_CN | ||
| 00-INDEX | -rw-r--r-- | 11.9 KB |
| BUG-HUNTING | -rw-r--r-- | 8.1 KB |
| Changes | -rw-r--r-- | 11.3 KB |
| CodingStyle | -rw-r--r-- | 28.9 KB |
| DMA-API.txt | -rw-r--r-- | 23.0 KB |
| DMA-ISA-LPC.txt | -rw-r--r-- | 5.2 KB |
| DMA-attributes.txt | -rw-r--r-- | 1.3 KB |
| DMA-mapping.txt | -rw-r--r-- | 27.3 KB |
| HOWTO | -rw-r--r-- | 28.6 KB |
| IO-mapping.txt | -rw-r--r-- | 7.8 KB |
| IPMI.txt | -rw-r--r-- | 27.0 KB |
| IRQ-affinity.txt | -rw-r--r-- | 2.1 KB |
| IRQ.txt | -rw-r--r-- | 962 bytes |
| Intel-IOMMU.txt | -rw-r--r-- | 3.9 KB |
| Makefile | -rw-r--r-- | 143 bytes |
| ManagementStyle | -rw-r--r-- | 12.9 KB |
| SAK.txt | -rw-r--r-- | 2.8 KB |
| SELinux.txt | -rw-r--r-- | 1.0 KB |
| SM501.txt | -rw-r--r-- | 2.8 KB |
| SecurityBugs | -rw-r--r-- | 1.8 KB |
| Smack.txt | -rw-r--r-- | 19.8 KB |
| SubmitChecklist | -rw-r--r-- | 3.5 KB |
| SubmittingDrivers | -rw-r--r-- | 6.2 KB |
| SubmittingPatches | -rw-r--r-- | 25.4 KB |
| VGA-softcursor.txt | -rw-r--r-- | 2.0 KB |
| applying-patches.txt | -rw-r--r-- | 19.5 KB |
| atomic_ops.txt | -rw-r--r-- | 19.0 KB |
| basic_profiling.txt | -rw-r--r-- | 1.7 KB |
| binfmt_misc.txt | -rw-r--r-- | 6.0 KB |
| braille-console.txt | -rw-r--r-- | 1.4 KB |
| bt8xxgpio.txt | -rw-r--r-- | 4.3 KB |
| c2port.txt | -rw-r--r-- | 2.8 KB |
| cachetlb.txt | -rw-r--r-- | 15.9 KB |
| cpu-hotplug.txt | -rw-r--r-- | 14.6 KB |
| cpu-load.txt | -rw-r--r-- | 3.0 KB |
| cpusets.txt | -rw-r--r-- | 34.6 KB |
| cputopology.txt | -rw-r--r-- | 1.2 KB |
| dcdbas.txt | -rw-r--r-- | 3.6 KB |
| debugging-modules.txt | -rw-r--r-- | 954 bytes |
| debugging-via-ohci1394.txt | -rw-r--r-- | 7.5 KB |
| dell_rbu.txt | -rw-r--r-- | 4.9 KB |
| devices.txt | -rw-r--r-- | 115.7 KB |
| dontdiff | -rw-r--r-- | 1.9 KB |
| edac.txt | -rw-r--r-- | 20.8 KB |
| eisa.txt | -rw-r--r-- | 7.1 KB |
| email-clients.txt | -rw-r--r-- | 9.0 KB |
| exception.txt | -rw-r--r-- | 12.1 KB |
| feature-removal-schedule.txt | -rw-r--r-- | 12.4 KB |
| ftrace.txt | -rw-r--r-- | 51.4 KB |
| gpio.txt | -rw-r--r-- | 25.9 KB |
| highuid.txt | -rw-r--r-- | 2.4 KB |
| hw_random.txt | -rw-r--r-- | 3.5 KB |
| ics932s401 | -rw-r--r-- | 1018 bytes |
| initrd.txt | -rw-r--r-- | 14.1 KB |
| io-mapping.txt | -rw-r--r-- | 3.2 KB |
| io_ordering.txt | -rw-r--r-- | 1.9 KB |
| iostats.txt | -rw-r--r-- | 7.9 KB |
| irqflags-tracing.txt | -rw-r--r-- | 2.6 KB |
| isapnp.txt | -rw-r--r-- | 433 bytes |
| java.txt | -rw-r--r-- | 10.7 KB |
| kernel-doc-nano-HOWTO.txt | -rw-r--r-- | 9.7 KB |
| kernel-docs.txt | -rw-r--r-- | 34.8 KB |
| kernel-parameters.txt | -rw-r--r-- | 74.9 KB |
| keys-request-key.txt | -rw-r--r-- | 7.4 KB |
| keys.txt | -rw-r--r-- | 46.2 KB |
| kobject.txt | -rw-r--r-- | 16.9 KB |
| kprobes.txt | -rw-r--r-- | 20.6 KB |
| kref.txt | -rw-r--r-- | 6.2 KB |
| ldm.txt | -rw-r--r-- | 3.9 KB |
| leds-class.txt | -rw-r--r-- | 3.8 KB |
| local_ops.txt | -rw-r--r-- | 6.1 KB |
| lockdep-design.txt | -rw-r--r-- | 8.8 KB |
| lockstat.txt | -rw-r--r-- | 6.5 KB |
| logo.gif | -rw-r--r-- | 16.0 KB |
| logo.txt | -rw-r--r-- | 563 bytes |
| magic-number.txt | -rw-r--r-- | 9.7 KB |
| markers.txt | -rw-r--r-- | 3.5 KB |
| mca.txt | -rw-r--r-- | 11.3 KB |
| md.txt | -rw-r--r-- | 19.6 KB |
| memory-barriers.txt | -rw-r--r-- | 76.2 KB |
| memory-hotplug.txt | -rw-r--r-- | 13.4 KB |
| memory.txt | -rw-r--r-- | 2.1 KB |
| mono.txt | -rw-r--r-- | 2.5 KB |
| mutex-design.txt | -rw-r--r-- | 5.8 KB |
| nmi_watchdog.txt | -rw-r--r-- | 3.9 KB |
| nommu-mmap.txt | -rw-r--r-- | 10.2 KB |
| numastat.txt | -rw-r--r-- | 861 bytes |
| oops-tracing.txt | -rw-r--r-- | 12.3 KB |
| parport-lowlevel.txt | -rw-r--r-- | 32.2 KB |
| parport.txt | -rw-r--r-- | 8.8 KB |
| pi-futex.txt | -rw-r--r-- | 5.7 KB |
| pnp.txt | -rw-r--r-- | 6.8 KB |
| preempt-locking.txt | -rw-r--r-- | 5.2 KB |
| printk-formats.txt | -rw-r--r-- | 1.0 KB |
| prio_tree.txt | -rw-r--r-- | 5.2 KB |
| rbtree.txt | -rw-r--r-- | 6.6 KB |
| rfkill.txt | -rw-r--r-- | 25.9 KB |
| robust-futex-ABI.txt | -rw-r--r-- | 8.7 KB |
| robust-futexes.txt | -rw-r--r-- | 9.4 KB |
| rt-mutex-design.txt | -rw-r--r-- | 32.8 KB |
| rt-mutex.txt | -rw-r--r-- | 3.5 KB |
| rtc.txt | -rw-r--r-- | 15.1 KB |
| serial-console.txt | -rw-r--r-- | 4.0 KB |
| sgi-ioc4.txt | -rw-r--r-- | 2.0 KB |
| sgi-visws.txt | -rw-r--r-- | 678 bytes |
| sparse.txt | -rw-r--r-- | 2.7 KB |
| spinlocks.txt | -rw-r--r-- | 8.8 KB |
| stable_api_nonsense.txt | -rw-r--r-- | 9.2 KB |
| stable_kernel_rules.txt | -rw-r--r-- | 2.8 KB |
| svga.txt | -rw-r--r-- | 14.1 KB |
| sysfs-rules.txt | -rw-r--r-- | 8.1 KB |
| sysrq.txt | -rw-r--r-- | 10.2 KB |
| tracepoints.txt | -rw-r--r-- | 3.7 KB |
| unaligned-memory-access.txt | -rw-r--r-- | 10.0 KB |
| unicode.txt | -rw-r--r-- | 6.5 KB |
| unshare.txt | -rw-r--r-- | 13.1 KB |
| video-output.txt | -rw-r--r-- | 1.1 KB |
| volatile-considered-harmful.txt | -rw-r--r-- | 5.6 KB |
| voyager.txt | -rw-r--r-- | 3.4 KB |
| zorro.txt | -rw-r--r-- | 2.8 KB |
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