Milosz Tanski 5a6f282a20 fscache: Netfs function for cleanup post readpages ... Currently the fscache code expect the netfs to call fscache_readpages_or_alloc inside the aops readpages callback. It marks all the pages in the list provided by readahead with PG_private_2. In the cases that the netfs fails to read all the pages (which is legal) it ends up returning to the readahead and triggering a BUG. This happens because the page list still contains marked pages. This patch implements a simple fscache_readpages_cancel function that the netfs should call before returning from readpages. It will revoke the pages from the underlying cache backend and unmark them. The problem was originally worked out in the Ceph devel tree, but it also occurs in CIFS. It appears that NFS, AFS and 9P are okay as read_cache_pages() will clean up the unprocessed pages in the case of an error. This can be used to address the following oops: [12410647.597278] BUG: Bad page state in process petabucket pfn:3d504e [12410647.597292] page:ffffea000f541380 count:0 mapcount:0 mapping: (null) index:0x0 [12410647.597298] page flags: 0x200000000001000(private_2) ... [12410647.597334] Call Trace: [12410647.597345] [<ffffffff815523f2>] dump_stack+0x19/0x1b [12410647.597356] [<ffffffff8111def7>] bad_page+0xc7/0x120 [12410647.597359] [<ffffffff8111e49e>] free_pages_prepare+0x10e/0x120 [12410647.597361] [<ffffffff8111fc80>] free_hot_cold_page+0x40/0x170 [12410647.597363] [<ffffffff81123507>] __put_single_page+0x27/0x30 [12410647.597365] [<ffffffff81123df5>] put_page+0x25/0x40 [12410647.597376] [<ffffffffa02bdcf9>] ceph_readpages+0x2e9/0x6e0 [ceph] [12410647.597379] [<ffffffff81122a8f>] __do_page_cache_readahead+0x1af/0x260 [12410647.597382] [<ffffffff81122ea1>] ra_submit+0x21/0x30 [12410647.597384] [<ffffffff81118f64>] filemap_fault+0x254/0x490 [12410647.597387] [<ffffffff8113a74f>] __do_fault+0x6f/0x4e0 [12410647.597391] [<ffffffff810125bd>] ? __switch_to+0x16d/0x4a0 [12410647.597395] [<ffffffff810865ba>] ? finish_task_switch+0x5a/0xc0 [12410647.597398] [<ffffffff8113d856>] handle_pte_fault+0xf6/0x930 [12410647.597401] [<ffffffff81008c33>] ? pte_mfn_to_pfn+0x93/0x110 [12410647.597403] [<ffffffff81008cce>] ? xen_pmd_val+0xe/0x10 [12410647.597405] [<ffffffff81005469>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e [12410647.597407] [<ffffffff8113f361>] handle_mm_fault+0x251/0x370 [12410647.597411] [<ffffffff812b0ac4>] ? call_rwsem_down_read_failed+0x14/0x30 [12410647.597414] [<ffffffff8155bffa>] __do_page_fault+0x1aa/0x550 [12410647.597418] [<ffffffff8108011d>] ? up_write+0x1d/0x20 [12410647.597422] [<ffffffff8113141c>] ? vm_mmap_pgoff+0xbc/0xe0 [12410647.597425] [<ffffffff81143bb8>] ? SyS_mmap_pgoff+0xd8/0x240 [12410647.597427] [<ffffffff8155c3ae>] do_page_fault+0xe/0x10 [12410647.597431] [<ffffffff81558818>] page_fault+0x28/0x30 Signed-off-by: Milosz Tanski <milosz@adfin.com> Signed-off-by: David Howells <dhowells@redhat.com>		2013-09-06 09:17:30 +01:00
..
ABI	Merge branch 'for-3.11/drivers' of git://git.kernel.dk/linux-block	2013-07-22 19:02:52 -07:00
accounting	Documentation/accounting/getdelays.c: avoid strncpy in accounting tool	2013-07-03 16:08:06 -07:00
acpi	Power management and ACPI updates for 3.11-rc1	2013-07-03 14:35:40 -07:00
aoe	aoe: allow user to disable target failure timeout	2012-12-17 17:15:25 -08:00
arm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
arm64	arm64: KVM: document kernel object mappings in HYP	2013-06-12 16:42:20 +01:00
auxdisplay
backlight	backlight: lp855x: remove duplicate platform data	2013-04-29 18:28:19 -07:00
blackfin
block	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
blockdev	nbd: update documentation and link to mailinglist	2013-02-27 19:10:22 -08:00
bus-devices
cdrom
cgroups	Merge branch 'for-3.11/core' of git://git.kernel.dk/linux-block	2013-07-11 13:03:24 -07:00
connector
console	TTY:console: update document console.txt	2013-05-21 10:21:57 -07:00
cpu-freq	cpufreq: rename index as driver_data in cpufreq_frequency_table	2013-06-04 14:25:59 +02:00
cpuidle	cpuidle: make a single register function for all	2013-04-23 13:45:22 +02:00
cris
crypto	drivers/dma: remove unused support for MEMSET operations	2013-07-03 16:07:42 -07:00
development-process
device-mapper	Add a device-mapper target called dm-switch to provide a multipath	2013-07-11 13:05:40 -07:00
devicetree	Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2013-08-11 12:10:47 -07:00
DocBook	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2013-08-09 15:04:09 -07:00
driver-model	lib: devres: Introduce devm_ioremap_resource()	2013-01-22 09:41:43 -08:00
dvb	[media] get_dvb_firmware: Fix the location of firmware for Terratec HTC	2013-01-01 11:18:26 -02:00
early-userspace	Documentation/early-userspace/README fix a typo	2013-06-05 16:24:58 +02:00
EDID	drm: Add 1600x1200 (UXGA) screen resolution to the built-in EDIDs	2013-04-12 14:06:16 +10:00
extcon
fault-injection
fb	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2013-07-09 16:04:31 -07:00
filesystems	fscache: Netfs function for cleanup post readpages	2013-09-06 09:17:30 +01:00
firmware_class
fmc	FMC: add a char-device mezzanine driver	2013-06-18 15:42:15 -07:00
frv
hid	HID: remove x bit from sensor doc	2012-12-14 08:48:59 +01:00
hwmon	New driver to support GMT G762/G763 pwm fan controllers	2013-07-03 19:56:35 -07:00
i2c	Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2013-07-04 14:02:09 -07:00
i2o
ia64	Fix example error_injection_tool	2013-04-02 09:39:55 -07:00
ide
infiniband
input	Input: MT - Specify that ABS_MT_SLOT must have a minimum of 0	2013-06-13 21:32:00 +02:00
ioctl	s390/sclp: Add SCLP character device driver	2013-06-26 21:10:13 +02:00
isdn
ja_JP	HOWTO ja_JP sync	2013-07-24 22:06:34 -07:00
kbuild	Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2013-07-10 16:06:46 -07:00
kdump	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
ko_KR
laptops	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
leds	leds: lp55xx: configure the clock detection	2013-04-01 11:04:53 -07:00
m68k	block: remove refs to XD disks from documentation	2013-05-17 15:17:12 +02:00
make
memory-devices
metag	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
mips
misc-devices	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
mmc	mmc: core: Add in support to expose PRV for v4 MMCs	2013-03-22 12:10:42 -04:00
mn10300
mtd
namespaces	userns: Recommend use of memory control groups.	2013-01-26 22:20:06 -08:00
netlabel
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
nfc	NFC: Update pn544 documentation	2013-01-10 01:27:46 +01:00
parisc	parisc: document the shadow registers	2013-07-09 22:09:19 +02:00
PCI	PCI/MSI: Enable multiple MSIs with pci_enable_msi_block_auto()	2013-01-24 17:25:13 +01:00
pcmcia
power	Merge branch 'pm-assorted'	2013-06-28 13:01:40 +02:00
powerpc	powerpc/perf: Core EBB support for 64-bit book3s	2013-07-01 11:50:10 +10:00
pps
prctl
pti
ptp
rapidio	rapidio: documentation update	2013-07-03 16:08:05 -07:00
RCU	Merge branches 'cbnum.2013.06.10a', 'doc.2013.06.10a', 'fixes.2013.06.10a', 'srcu.2013.06.10a' and 'tiny.2013.06.10a' into HEAD	2013-06-10 13:46:44 -07:00
s390	s390/cio: add condev keyword to cio_ignore	2013-05-02 15:50:20 +02:00
scheduler	sched: Rename sched.c as sched/core.c in comments and Documentation	2013-06-19 12:58:42 +02:00
scsi	[SCSI] megaraid_sas: Changelog and driver version update	2013-06-24 17:52:10 -07:00
security	Smack: add support for modification of existing rules	2013-03-19 14:16:42 -07:00
serial	stallion: final cleanup	2013-06-03 14:31:39 -07:00
sh
sound	ALSA: hda - Update HD-Audio-Models.txt	2013-06-17 11:16:33 +02:00
spi	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
sysctl	net: rename CONFIG_NET_LL_RX_POLL to CONFIG_NET_RX_BUSY_POLL	2013-08-01 15:11:17 -07:00
target
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2013-07-11 12:26:08 -07:00
timers	nohz_full: Document additional restrictions	2013-06-10 13:42:38 -07:00
trace	The majority of the changes here are cleanups for the large changes that	2013-07-11 09:02:09 -07:00
usb	Driver core patches for 3.11-rc1	2013-07-02 11:44:19 -07:00
vDSO
video4linux	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2013-07-13 12:09:57 -07:00
virtual	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
vm	zswap: add documentation	2013-07-10 18:11:34 -07:00
w1	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
watchdog	watchdog: delete mpcore_wdt driver	2013-07-11 21:47:58 +02:00
wimax
x86	arm: add support for LZ4-compressed kernel	2013-07-09 10:33:30 -07:00
xtensa	xtensa: document MMUv3 setup sequence	2013-05-09 01:07:09 -07:00
zh_CN	[media] v4l2-framework: replace g_chip_ident by g_std in the examples	2013-06-17 09:18:29 -03:00
.gitignore
00-INDEX	FMC: add documentation for the core	2013-06-18 15:41:03 -07:00
applying-patches.txt
atomic_ops.txt	Documentation: Memory barrier semantics of atomic_xchg()	2013-01-08 14:14:55 -08:00
bad_memory.txt
basic_profiling.txt
bcache.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
Changes
circular-buffers.txt
clk.txt	doc: clk: Fix incorrect wording	2013-06-10 23:54:14 +02:00
coccinelle.txt	Coccinelle: Update information about the minimal version required	2013-07-03 22:58:20 +02:00
CodingStyle	Documentation/CodingStyle: allow multiple return statements per function	2013-07-03 16:08:01 -07:00
cpu-hotplug.txt	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt	/dev/oldmem: Remove the interface	2013-07-03 16:08:03 -07:00
digsig.txt
DMA-API-HOWTO.txt	Documentation/DMA-API-HOWTO.txt: fix typo	2013-02-27 19:10:23 -08:00
DMA-API.txt
DMA-attributes.txt
dma-buf-sharing.txt	dma-buf: replace dma_buf_export() with dma_buf_export_named()	2013-05-01 16:35:36 +05:30
DMA-ISA-LPC.txt
dmaengine.txt
dmatest.txt	dmatest: do not allow to interrupt ongoing tests	2013-06-08 02:13:44 +05:30
dontdiff
dynamic-debug-howto.txt	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
edac.txt
eisa.txt
email-clients.txt
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gpio.txt	Remove GENERIC_GPIO config option	2013-04-16 18:47:19 +09:00
highuid.txt
HOWTO	Documentation: Updated broken link in HOWTO	2013-06-03 14:22:57 -07:00
hw_random.txt	hwrng: Fix a wrong comment in Documentation/hw_random.txt	2013-03-10 18:16:36 +08:00
hwspinlock.txt
init.txt
initrd.txt
Intel-IOMMU.txt
intel_txt.txt	Documentation: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:38:03 -08:00
io-mapping.txt
io_ordering.txt
iostats.txt	iostats.txt: add easy-to-find description for field 6	2013-04-29 15:18:50 +02:00
IPMI.txt	ipmi: add options to disable openfirmware and PCI scanning	2013-02-27 19:10:21 -08:00
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt	kernel-doc: Update references to SGML to refs to XML instead.	2013-05-28 12:02:11 +02:00
kernel-docs.txt
kernel-parameters.txt	memcg: get rid of swapaccount leftovers	2013-08-23 09:51:22 -07:00
kernel-per-CPU-kthreads.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
kmemcheck.txt
kmemleak.txt
kobject.txt
kprobes.txt
kref.txt
ldm.txt
local_ops.txt
lockdep-design.txt
lockstat.txt	locking/stat: Fix a typo	2013-02-19 08:42:37 +01:00
lockup-watchdogs.txt
logo.gif
logo.txt
magic-number.txt	wanrouter: completely decouple obsolete code from kernel.	2013-01-31 19:20:33 -05:00
Makefile
ManagementStyle
md.txt	md: remove doubled description for sync_max, merging it within sync_min/sync_max	2013-07-03 09:43:28 +10:00
media-framework.txt	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media	2013-07-13 12:09:57 -07:00
memory-barriers.txt	Documentation: Memory barrier semantics of atomic_xchg()	2013-01-08 14:14:55 -08:00
memory-hotplug.txt	hotplug: update nodemasks management	2012-12-12 17:38:33 -08:00
mono.txt
mutex-design.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
pi-futex.txt
pinctrl.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-07-04 11:40:58 -07:00
pnp.txt
preempt-locking.txt
printk-formats.txt	lib: vsprintf: add IPv4/v6 generic %p[Ii]S[pfs] format specifier	2013-07-01 23:22:13 -07:00
pwm.txt	pwm: Add sysfs interface	2013-06-21 11:32:51 +02:00
ramoops.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt	Documentation: remove __dev* attributes.	2013-01-03 15:57:16 -08:00
rt-mutex-design.txt	sched: Rename sched.c as sched/core.c in comments and Documentation	2013-06-19 12:58:42 +02:00
rt-mutex.txt
rtc.txt	rtc: add ability to push out an existing wakealarm using sysfs	2013-07-03 16:07:54 -07:00
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
smsc_ece1099.txt
sparse.txt	Documentation/sparse.txt: document context annotations for lock checking	2012-12-17 17:15:23 -08:00
spinlocks.txt	sched: Rename sched.c as sched/core.c in comments and Documentation	2013-06-19 12:58:42 +02:00
stable_api_nonsense.txt
stable_kernel_rules.txt
static-keys.txt
SubmitChecklist	Finally eradicate CONFIG_HOTPLUG	2013-06-03 14:20:18 -07:00
SubmittingDrivers
SubmittingPatches	checkpatch: add Suggested-by as a standard signature	2013-04-29 18:28:20 -07:00
svga.txt
sysfs-rules.txt
sysrq.txt	Documentation/sysrq: fix inconstistent help message of sysrq key	2013-04-30 17:04:10 -07:00
this_cpu_ops.txt	percpu: add documentation on this_cpu operations	2013-04-04 10:24:53 -07:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt	vfio Updates for v3.11	2013-07-10 14:50:08 -07:00
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
ww-mutex-design.txt	mutex: Add support for wound/wait style locks	2013-06-26 12:10:56 +02:00
xz.txt
zorro.txt