- 13 Aug, 2010 1 commit
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Tony Luck authored
These have been broken (returning "int") since the dawn of time. But there were no users that needed the whole value until commit 424acaae rwsem: wake queued readers when writer blocks on active read lock made this change: - (rwsem_atomic_update(0, sem) & RWSEM_ACTIVE_MASK)) - /* Someone grabbed the sem already */ + rwsem_atomic_update(0, sem) < RWSEM_WAITING_BIAS) + /* Someone grabbed the sem for write already */ RWSEM_ACTIVE_MASK is 0xffffffffL, so the old code only looked at the low order 32-bits. The new code needs to see all 64 bits. Signed-off-by:
Tony Luck <tony.luck@intel.com>
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- 12 Aug, 2010 39 commits
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git://www.jni.nu/crisLinus Torvalds authored
* 'io_remap_pfn_range' of git://www.jni.nu/cris: CRIS: Define io_remap_pfn_range as remap_pfn_range
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git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dmLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (33 commits) dm mpath: support discard dm stripe: support discards dm: split discard requests on target boundaries dm stripe: optimize sector division dm stripe: move sector translation to a function dm: error return error for discards dm delay: support discard dm: zero silently drop discards dm: use dm_target_offset macro dm: factor out max_io_len_target_boundary dm: use common __issue_target_request for flush and discard support dm: linear support discard dm crypt: simplify crypt_ctr dm crypt: simplify crypt_config destruction logic dm: allow autoloading of dm mod dm: rename map_info flush_request to target_request_nr dm ioctl: refactor dm_table_complete dm snapshot: implement merge dm: do not initialise full request queue when bio based dm ioctl: make bio or request based device type immutable ...
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git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6Linus Torvalds authored
* 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: hugetlb: add missing unlock in avoidcopy path in hugetlb_cow() hwpoison: rename CONFIG HWPOISON, hugetlb: support hwpoison injection for hugepage HWPOISON, hugetlb: detect hwpoison in hugetlb code HWPOISON, hugetlb: isolate corrupted hugepage HWPOISON, hugetlb: maintain mce_bad_pages in handling hugepage error HWPOISON, hugetlb: set/clear PG_hwpoison bits on hugepage HWPOISON, hugetlb: enable error handling path for hugepage hugetlb, rmap: add reverse mapping for hugepage hugetlb: move definition of is_vm_hugetlb_page() to hugepage_inline.h Fix up trivial conflicts in mm/memory-failure.c
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git://neil.brown.name/mdLinus Torvalds authored
* 'for-linus' of git://neil.brown.name/md: Further tidyup of raid6 naming in lib/raid6 Make lib/raid6/test build correctly. Rename raid6 files now they're in a 'raid6' directory.
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git://codeaurora.org/quic/kernel/dwalker/linux-msmLinus Torvalds authored
* 'msm-core' of git://codeaurora.org/quic/kernel/dwalker/linux-msm: msm: mmc: Add msm prefix to platform data structure msm: trout: Remove extern declaration from source file arm: msm: Fix section mismatch in smd.c. arm: msm: trout add mmc support arm: msm: trout: add trout specific gpio interrupts arm: msm: remove unused #include <linux/version.h>
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git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds authored
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] add missing __percpu markup in pcc-cpufreq.c
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git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/stagingLinus Torvalds authored
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: I2C bus multiplexer driver pca954x i2c: Multiplexed I2C bus core support i2c: Use a separate mutex for userspace client lists i2c: Make i2c_default_probe self-sufficient i2c: Drop dummy variable i2c: Move adapter locking helpers to i2c-core V4L/DVB: Use custom I2C probing function mechanism i2c: Add support for custom probe function i2c-dev: Use memdup_user i2c-dev: Remove unnecessary kmalloc casts
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds authored
* 'params' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (22 commits) param: don't deref arg in __same_type() checks param: update drivers/acpi/debug.c to new scheme param: use module_param in drivers/message/fusion/mptbase.c ide: use module_param_named rather than module_param_call param: update drivers/char/ipmi/ipmi_watchdog.c to new scheme param: lock if_sdio's lbs_helper_name and lbs_fw_name against sysfs changes. param: lock myri10ge_fw_name against sysfs changes. param: simple locking for sysfs-writable charp parameters param: remove unnecessary writable charp param: add kerneldoc to moduleparam.h param: locking for kernel parameters param: make param sections const. param: use free hook for charp (fix leak of charp parameters) param: add a free hook to kernel_param_ops. param: silence .init.text references from param ops Add param ops struct for hvc_iucv driver. nfs: update for module_param_named API change AppArmor: update for module_param_named API change param: use ops in struct kernel_param, rather than get and set fns directly param: move the EXPORT_SYMBOL to after the definitions. ...
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git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (22 commits) regulator: Remove default DEBUG define from TPS6586x regulator: tps6507x - add missing platform_set_drvdata in tps6507x_pmic_probe regulator: tps6586x - add regulator_unregister() in tps6586x_regulator_remove() mfd: max8998 - fix incorrect kfree(i2c) in i2c_driver probe callback handler regulator: lp3971 - remove unnecessary ret value checking in lp3971_i2c_write() regulator: max8660 - fix a memory leak in max8660_remove() regulator: max1586 - fix a memory leak in max1586_pmic_remove() regulator: Default GPIO controlled WM8994 regulators to disabled regulator: lp3971 - remove unnecessary ret value checking in lp3971_i2c_write() max8998: fix off-by-one value range checking regulator: tps6586x: fix millivolt return values and SM2 table regulator: tps6586x: add dependancy on MFD_TPS6585x regulator: add TPS6586X regulator driver regulator: MAX8998: set_voltage bugfix. ramp_up delay and min/max voltage regulator: add support for regulators on the ab8500 MFD ab8500-mfd: add regulator support to ab8500 mfd device tps65023: Allow registering similar TPS65021 drivers: regulators: depend on MFD_MAX8998 drivers: regulator: add Maxim 8998 driver ISL6271A voltage regulator support. ...
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6Linus Torvalds authored
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (40 commits) mfd: Fix incorrect kfree(i2c) in wm8994-core i2c_driver probe mfd: Fix incorrect kfree(i2c) in wm831x-core i2c_driver probe mfd: Fix incorrect kfree(i2c) in tps6507x i2c_driver probe mfd: Add TPS6586x driver mfd: Use macros instead of some constant magic numbers for menelaus mfd: Fix menelaus mmc slot 2 misconfiguration mfd: Missing slab.h includes mfd: Fix wrong wm8350-core kfree in error path mfd: Fix wm8994_device_init() return value mfd: Avoid calling platform_device_put() twice in ucb1400 probe error path mfd: Annotate tc6387xb probe/remove routines with __devinit/__devexit mfd: Fix tc6387xb resource reclaim mfd: Fix wrong goto labels for tc6393xb error handling mfd: Get rid of now unused mc13783 private header hwmon: Don't access struct mc13783 directly from mc13783-adc mfd: New mc13783 function exposing flags mfd: Check jz4740-adc kmalloc() result mfd: Fix jz4740-adc resource reclaim in probe error path mfd: Add WM8321 support mfd: Add stmpe auto sleep feature ...
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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: ASoC: add AD1980 obsolete information ASoC: register cache should be 1 byte aligned for 1 byte long register ALSA: hda - Adding support for new IDT 92HD87XX codecs ASoC: Fix inverted mute controls for WM8580 ALSA: HDA: Use model=auto for LG R510 ALSA: hda - Update model entries in HD-Audio-Models.txt ALSA: hda: document VIA models ALSA: hda - patch_nvhdmi.c: Add missing codec IDs, unify names ALSA: hda - add support for Conexant CX20584 ALSA: hda - New snd-hda-intel model/pin config for hp dv7-4000 ALSA: hda - Fix missing stream for second ADC on Realtek ALC260 HDA codec ALSA: hda - Make converter setups sticky ALSA: hda - Add support for Acer ZGA ALC271 (1025:047c) sound/oss: Adjust confusing if indentation sound: oss: au1550_ac97.c removed duplicated #include ASoC: Fix for changed Eureka Kconfig symbol names
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git://git.infradead.org/battery-2.6Linus Torvalds authored
* git://git.infradead.org/battery-2.6: intel_mid_battery: Fix battery scaling intel_mid_battery: Fix the argument order to intel_scu_ipc_command olpc_battery: Fix build failure caused by sysfs changes Add s3c-adc-battery driver Intel MID platform battery driver Fix up trivial conflicts (battery drivers added from different branches) in drivers/power/{Kconfig,Makefile}
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Chris Wilson authored
The current computation, introduced with f12a15be, of FSEC_PER_SEC using the multiplication of (FSEC_PER_NSEC * NSEC_PER_SEC) is performed only with 32bit integers on small machines, resulting in an overflow and a *very* short intervals being programmed. An interrupt storm follows. Note that we also have to specify FSEC_PER_SEC as being long long to overcome the same limitations. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by:
Ingo Molnar <mingo@elte.hu> Acked-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jason Wessel authored
The tv_nsec is a long and when added to the shifted interval it can wrap and become negative which later causes looping problems in the getrawmonotonic(). The edge case occurs when the system has slept for a short period of time of ~2 seconds. A trace printk of the values in this patch illustrate the problem: ftrace time stamp: log 43.716079: logarithmic_accumulation: raw: 3d0913 tv_nsec d687faa 43.718513: logarithmic_accumulation: raw: 3d0913 tv_nsec da588bd 43.722161: logarithmic_accumulation: raw: 3d0913 tv_nsec de291d0 46.349925: logarithmic_accumulation: raw: 7a122600 tv_nsec e1f9ae3b 46.349930: logarithmic_accumulation: raw: 1e848980 tv_nsec 8831c0e3 The kernel starts looping at 46.349925 in the getrawmonotonic() due to the negative value from adding the raw value to tv_nsec. A simple solution is to accumulate into a u64, and then normalize it to a timespec_t. Signed-off-by:
Jason Wessel <jason.wessel@windriver.com> [ Reworked variable names and simplified some of the code. - John ] Signed-off-by:
John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
Use no_printk() for disabled gdbstub debugging functions to maintain side effect checking. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
Add a dummy printk function for the maintenance of unused printks through gcc format checking, and also so that side-effect checking is maintained too. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
Don't try and #include <linux/slab.h> in lib/inflate.c from the bootloader code as linux/slab.h hauls in function defs that aren't available in the bootloader code and may also haul in conflicting functions. To fix this, make the inclusion of linux/slab.h contingent on NO_INFLATE_MALLOC as are the usages of kmalloc() and kfree(). In MN10300, this causes the following errors: In file included from include/linux/string.h:21, from include/linux/bitmap.h:8, from include/linux/nodemask.h:93, from include/linux/mmzone.h:16, from include/linux/gfp.h:4, from include/linux/slab.h:12, from arch/mn10300/boot/compressed/../../../../lib/inflate.c:106, from arch/mn10300/boot/compressed/misc.c:170: /warthog/am33/linux-2.6-mn10300/arch/mn10300/include/asm/string.h:19: error: conflicting types for 'memset' arch/mn10300/boot/compressed/misc.c:59: error: previous definition of 'memset' was here Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
Permit .GCC-command-line sections in modules. Otherwise modpost says things like: WARNING: drivers/mtd/chips/map_ram.o (.GCC-command-line): unexpected non-allocatable section. Did you forget to use "ax"/"aw" in a .S file? Note that for example <linux/init.h> contains section definitions for use in .S files. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
With the newer compilers, size_t and ssize_t are expected to be (un)signed int rather than (un)signed long. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Howells authored
A change to the RTC routines in the MN10300 arch used set_rtc_mms() when it meant set_rtc_mmss(). This results in an error due to a reference of an undefined symbol. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Namhyung Kim authored
pcc_cpu_info is a percpu pointer but was missing __percpu markup. Add it. Signed-off-by:
Namhyung Kim <namhyung@gmail.com> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Dave Jones <davej@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds authored
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Fix rwsem: RWSEM_WAITING_BIAS must not be unsigned.
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6Linus Torvalds authored
* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (55 commits) io-mapping: move asm include inside the config option vgaarb: drop vga.h include drm/radeon: Add probing of clocks from device-tree drm/radeon: drop old and broken mesa warning drm/radeon: Fix pci_map_page() error checking drm: Remove count_lock for calling lastclose() after 58474713 (v2) drm/radeon/kms: allow FG_ALPHA_VALUE on r5xx drm/radeon/kms: another r6xx/r7xx CS checker fix DRM: Replace kmalloc/memset combos with kzalloc drm: expand gamma_set drm/edid: Split mode lists out to their own header for readability drm/edid: Rewrite mode parse to use the generic detailed block walk drm/edid: Add detailed block walk for VTB extensions drm/edid: Add detailed block walk for CEA extensions drm: Remove unused fields from drm_display_info drm: Use ENOENT consistently for the error return for an unmatched handle. drm/radeon/kms: mark 3D power states as performance drm: Only set DPMS once on the CRTC not after every encoder. drm/radeon/kms: add additional quirk for Acer rv620 laptop drm: Propagate error code from fb_create() ... Fix up trivial conflicts in drivers/gpu/drm/drm_edid.c
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Tony Luck authored
Some nice improvements were made to rwsem in commit: 424acaae rwsem: wake queued readers when writer blocks on active read lock but this change overlooked that ia64 had defined RWSEM_WAITING_BIAS as an unsigned value, while the new code required a signed value (as it is in every other architecture). This fix suggested by the original patch author: Michel Lespinasse. Signed-off-by:
Tony Luck <tony.luck@intel.com>
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git://git.secretlab.ca/git/linux-2.6Linus Torvalds authored
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: mmc_spi: Fix unterminated of_match_table of/sparc: fix build regression from of_device changes of/device: Replace struct of_device with struct platform_device
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git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xenLinus Torvalds authored
* 'stable/xen-swiotlb-0.8.6' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: x86: Detect whether we should use Xen SWIOTLB. pci-swiotlb-xen: Add glue code to setup dma_ops utilizing xen_swiotlb_* functions. swiotlb-xen: SWIOTLB library for Xen PV guest with PCI passthrough. xen/mmu: inhibit vmap aliases rather than trying to clear them out vmap: add flag to allow lazy unmap to be disabled at runtime xen: Add xen_create_contiguous_region xen: Rename the balloon lock xen: Allow unprivileged Xen domains to create iomap pages xen: use _PAGE_IOMAP in ioremap to do machine mappings Fix up trivial conflicts (adding both xen swiotlb and xen pci platform driver setup close to each other) in drivers/xen/{Kconfig,Makefile} and include/xen/xen-ops.h
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Maxim Levitsky authored
mspro_block_remove() is called from detect thread that first calls the mspro_block_stop(), which stops the request queue. If we call del_gendisk() with the queue stopped we get a deadlock. Signed-off-by:
Maxim Levitsky <maximlevitsky@gmail.com> Cc: Alex Dubov <oakad@yahoo.com> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Maxim Levitsky authored
Otherwise lockdep complains. Signed-off-by:
Maxim Levitsky <maximlevitsky@gmail.com> Cc: Alex Dubov <oakad@yahoo.com> Cc: <stable@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
- Fix mmc_test_alloc_mem. - Use nr_free_buffer_pages() instead of sysinfo.totalram to determine total lowmem pages. - Change variables containing memory sizes to unsigned long. - Limit maximum test area size to 128MiB because that is the maximum MMC high capacity erase size (the maxmium SD allocation unit size is just 4MiB) Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
mmc_test provides tests aimed at testing SD/MMC hosts. This patch adds performance tests. It is advantageous to have performance tests in a kernel module like mmc_test for the following reasons: - transfer times can be measured very accurately - arbitrarily large transfers are possible - the effect of contiguous vs scattered pages can be determined The new tests are: 23. Best-case read performance 24. Best-case write performance 25. Best-case read performance into scattered pages 26. Best-case write performance from scattered pages 27. Single read performance by transfer size 28. Single write performance by transfer size 29. Single trim performance by transfer size 30. Consecutive read performance by transfer size 31. Consecutive write performance by transfer size 32. Consecutive trim performance by transfer size Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
Secure discard is implemented by Secure Trim if the discard is unaligned or Secure Erase otherwise. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
Jens Axboe <axboe@kernel.dk> Cc: Kyungmin Park <kmpark@infradead.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Gardiner <bengardiner@nanometrics.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
Secure discard is the same as discard except that all copies of the discarded sectors (perhaps created by garbage collection) must also be erased. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
Jens Axboe <axboe@kernel.dk> Cc: Kyungmin Park <kmpark@infradead.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Gardiner <bengardiner@nanometrics.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
Disable the data (busy) timeout for erases and set the MMC_CAP_ERASE capability. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
Jens Axboe <axboe@kernel.dk> Cc: Kyungmin Park <kmpark@infradead.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Gardiner <bengardiner@nanometrics.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
Enable MMC to service discard requests. In the case of SD and MMC cards that do not support trim, discards become erases. In the case of cards (MMC) that only allow erases in multiples of erase group size, round to the nearest completely discarded erase group. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
Jens Axboe <axboe@kernel.dk> Cc: Kyungmin Park <kmpark@infradead.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Gardiner <bengardiner@nanometrics.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Adrian Hunter authored
SD/MMC cards tend to support an erase operation. In addition, eMMC v4.4 cards can support secure erase, trim and secure trim operations that are all variants of the basic erase command. SD/MMC device attributes "erase_size" and "preferred_erase_size" have been added. "erase_size" is the minimum size, in bytes, of an erase operation. For MMC, "erase_size" is the erase group size reported by the card. Note that "erase_size" does not apply to trim or secure trim operations where the minimum size is always one 512 byte sector. For SD, "erase_size" is 512 if the card is block-addressed, 0 otherwise. SD/MMC cards can erase an arbitrarily large area up to and including the whole card. When erasing a large area it may be desirable to do it in smaller chunks for three reasons: 1. A single erase command will make all other I/O on the card wait. This is not a problem if the whole card is being erased, but erasing one partition will make I/O for another partition on the same card wait for the duration of the erase - which could be a several minutes. 2. To be able to inform the user of erase progress. 3. The erase timeout becomes too large to be very useful. Because the erase timeout contains a margin which is multiplied by the size of the erase area, the value can end up being several minutes for large areas. "erase_size" is not the most efficient unit to erase (especially for SD where it is just one sector), hence "preferred_erase_size" provides a good chunk size for erasing large areas. For MMC, "preferred_erase_size" is the high-capacity erase size if a card specifies one, otherwise it is based on the capacity of the card. For SD, "preferred_erase_size" is the allocation unit size specified by the card. "preferred_erase_size" is in bytes. Signed-off-by:
Adrian Hunter <adrian.hunter@nokia.com> Acked-by:
Jens Axboe <axboe@kernel.dk> Cc: Kyungmin Park <kmpark@infradead.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Gardiner <bengardiner@nanometrics.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jan Kara authored
Commit 83ba7b07 ("writeback: simplify the write back thread queue") broke writeback_in_progress() as in that commit we started to remove work items from the list at the moment we start working on them and not at the moment they are finished. Thus if the flusher thread was doing some work but there was no other work queued, writeback_in_progress() returned false. This could in particular cause unnecessary queueing of background writeback from balance_dirty_pages() or writeout work from writeback_sb_if_idle(). This patch fixes the problem by introducing a bit in the bdi state which indicates that the flusher thread is processing some work and uses this bit for writeback_in_progress() test. NOTE: Both callsites of writeback_in_progress() (namely, writeback_inodes_sb_if_idle() and balance_dirty_pages()) would actually need a different information than what writeback_in_progress() provides. They would need to know whether *the kind of writeback they are going to submit* is already queued. But this information isn't that simple to provide so let's fix writeback_in_progress() for the time being. Signed-off-by:
Jan Kara <jack@suse.cz> Cc: Christoph Hellwig <hch@lst.de> Cc: Wu Fengguang <fengguang.wu@intel.com> Acked-by:
Jens Axboe <jaxboe@fusionio.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Wu Fengguang authored
Unify the logic for kupdate and non-kupdate cases. There won't be starvation because the inodes requeued into b_more_io will later be spliced _after_ the remaining inodes in b_io, hence won't stand in the way of other inodes in the next run. It avoids unnecessary redirty_tail() calls, hence the update of i_dirtied_when. The timestamp update is undesirable because it could later delay the inode's periodic writeback, or may exclude the inode from the data integrity sync operation (which checks timestamp to avoid extra work and livelock). === How the redirty_tail() comes about: It was a long story.. This redirty_tail() was introduced with wbc.more_io. The initial patch for more_io actually does not have the redirty_tail(), and when it's merged, several 100% iowait bug reports arised: reiserfs: http://lkml.org/lkml/2007/10/23/93 jfs: commit 29a424f2 JFS: clear PAGECACHE_TAG_DIRTY for no-write pages ext2: http://www.spinics.net/linux/lists/linux-ext4/msg04762.html They are all old bugs hidden in various filesystems that become "visible" with the more_io patch. At the time, the ext2 bug is thought to be "trivial", so not fixed. Instead the following updated more_io patch with redirty_tail() is merged: http://www.spinics.net/linux/lists/linux-ext4/msg04507.html This will in general prevent 100% on ext2 and possibly other unknown FS bugs. Signed-off-by:
Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Martin Bligh <mbligh@google.com> Cc: Michael Rubin <mrubin@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Wu Fengguang authored
This was not a bug, since b_io is empty for kupdate writeback. The next patch will do requeue_io() for non-kupdate writeback, so let's fix it. Signed-off-by:
Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Martin Bligh <mbligh@google.com> Cc: Michael Rubin <mrubin@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Wu Fengguang authored
Avoid delaying writeback for an expire inode with lots of dirty pages, but no active dirtier at the moment. Previously we only do that for the kupdate case. Any filesystem that does delayed allocation or unwritten extent conversion after IO completion will cause this - for example, XFS. Signed-off-by:
Wu Fengguang <fengguang.wu@intel.com> Acked-by:
Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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