The BUG_ON at the end of __bch_btree_mark_key can be triggered due to
an integer overflow error:
BITMASK(GC_SECTORS_USED, struct bucket, gc_mark, 2, 13);
...
SET_GC_SECTORS_USED(g, min_t(unsigned,
GC_SECTORS_USED(g) + KEY_SIZE(k),
(1 << 14) - 1));
BUG_ON(!GC_SECTORS_USED(g));
In bcache.h, the SECTORS_USED bitfield is defined to be 13 bits wide.
While the SET_ code tries to ensure that the field doesn't overflow by
clamping it to (1<<14)-1 == 16383, this is incorrect because 16383
requires 14 bits. Therefore, if GC_SECTORS_USED() + KEY_SIZE() =
8192, the SET_ statement tries to store 8192 into a 13-bit field. In
a 13-bit field, 8192 becomes zero, thus triggering the BUG_ON.
Therefore, create a field width constant and a max value constant, and
use those to create the bitfield and check the inputs to
SET_GC_SECTORS_USED. Arguably the BITMASK() template ought to have
BUG_ON checks for too-large values, but that's a separate patch.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
We need to return -EINTR after a split because we invalidated iterators
(and freed the btree node) - but if we were finished inserting, we don't
want to redo the traversal.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
When deciding what order to reuse buckets we take into account both the bucket's
priority (which indicates lru order) and also the amount of live data in that
bucket. The way they were scaled together wasn't as correct as it could be...
this patch improves and documents it.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Checks if two keys have equivalent header fields.
(good enough for replacement or merging)
Used in bch_bkey_try_merge, and replacing a key
in the btree.
Signed-off-by: Nicholas Swenson <nks@daterainc.com>
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Added generic header checks to bch_bkey_try_merge,
which then calls the bkey specific function
Removed extraneous checks from bch_extent_merge
Signed-off-by: Nicholas Swenson <nks@daterainc.com>
We're in the process of turning bset.c into library code, so none of the code in
that file should know about struct cache_set or struct btree - so, move the
btree traversal part of the stats code to sysfs.c.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
More disentangling bset.c from the rest of the bcache code - soon, the
sorting routines won't have any dependencies on any outside structs.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Only use extent comparison for comparing extents, so we're not using
START_KEY() on other key types (i.e. btree pointers)
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Getting away from KEY_PTRS and moving toward KEY_U64s - and getting rid of magic
2s
Also - split out the part that checks against journal entry size so as to avoid
a dependancy on struct cache_set in bset.c
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Now that we've got code for raid5/6 stripe awareness, bcache just needs
to know about the stripes and when writing partial stripes is expensive
- we probably don't want to enable this optimization for raid1 or 10,
even though they have stripes. So add a flag to queue_limits.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This error path shouldn't have been hit in practice.. and we've got reworked
reserve code coming soon so that it shouldn't _ever_ be bit... but if we've got
code for this error path it should be correct.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
We need a reserve for allocating buckets for new btree nodes - and now that
we've got multiple btrees, it really needs to be per btree.
This reworks the reserves so we've got separate freelists for each reserve
instead of watermarks, which seems to make things a bit cleaner, and it adds
some code so that btree_split() can make sure the reserve is available before it
starts.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Unnecessary since a bucket that has dirty pointers pointing to it can
never be invalidated - and skipping it is a measurable performance
boost, since the bucket gen will usually be a cache miss.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
We were unnecessarily waiting on a journal write to complete when we just needed
to start a journal write and start setting up the next one.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
The real fix is where we check the bytes we need against how much is
remaining - we also need to check for a journal entry bigger than our
buffer, we'll never write those and it would be bad if we tried to read
one.
Also improve the diagnostic messages.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
The code that handles overlapping extents that we've just read back in from disk
was depending on the behaviour of the code that handles overlapping extents as
we're inserting into a btree node in the case of an insert that forced an
existing extent to be split: on insert, if we had to split we'd also insert a
new extent to represent the top part of the old extent - and then that new
extent would get written out.
The code that read the extents back in thus not bother with splitting extents -
if it saw an extent that ovelapped in the middle of an older extent, it would
trim the old extent to only represent the bottom part, assuming that the
original insert would've inserted a new extent to represent the top part.
I still haven't figured out _how_ it can happen, but I'm now pretty convinced
(and testing has confirmed) that there's some kind of an obscure corner case
(probably involving extent merging, and multiple overwrites in different sets)
that breaks this. The fix is to change the mergesort fixup code to split extents
itself when required.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
blk_rq_init() is called in req's complete handler to initialize
the request, so the members of start_time and start_time_ns might
become inaccurate when it is allocated in future.
The patch initializes the two members in blk_mq_rq_ctx_init() to
fix the problem.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Set the return variable to an error code as done elsewhere in the function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
blk_mq_free_queue() is called from release handler of
queue kobject, so it needn't be called from drivers.
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This patch moves synchronization on mq->delay_work
from blk_mq_free_queue() to blk_sync_queue(), so that
blk_sync_queue can work on mq.
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
blk_mq_drain_queue() is introduced so that we can drain
mq queue inside blk_cleanup_queue().
Also don't accept new requests any more if queue is marked
as dying.
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Merge tag 'v3.13-rc6' into for-3.14/core
Needed to bring blk-mq uptodate, since changes have been going in
since for-3.14/core was established.
Fixup merge issues related to the immutable biovec changes.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Conflicts:
block/blk-flush.c
fs/btrfs/check-integrity.c
fs/btrfs/extent_io.c
fs/btrfs/scrub.c
fs/logfs/dev_bdev.c
Another smallish batch of fixes, it's been quiet due to the holidays. Nothing
controversial here, a handful of things across the board.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Another smallish batch of fixes, it's been quiet due to the holidays.
Nothing controversial here, a handful of things across the board"
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: pxa: fix USB gadget driver compilation regression
ARM: OMAP2+: Fix LCD panel backlight regression for LDP legacy booting
ARM: OMAP2+: hwmod_data: fix missing OMAP_INTC_START in irq data
ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL
ARM: shmobile: r8a7790: fix shdi resource sizes
ARM: shmobile: bockw: fixup DMA mask
ARM: shmobile: armadillo: Add PWM backlight power supply
Pull x86 fixes from Peter Anvin:
"There is a small EFI fix and a big power regression fix in this batch.
My queue also had a fix for downing a CPU when there are insufficient
number of IRQ vectors available, but I'm holding that one for now due
to recent bug reports"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/efi: Don't select EFI from certain special ACPI drivers
x86 idle: Repair large-server 50-watt idle-power regression
- Fix for a cpufreq regression causing stale sysfs files to be left
behind during system resume if cpufreq_add_dev() fails for one or
more CPUs from Viresh Kumar.
- Fix for a bug in cpufreq causing CONFIG_CPU_FREQ_DEFAULT_* to be
ignored when the intel_pstate driver is used from Jason Baron.
- System suspend fix for a memory leak in pm_vt_switch_unregister()
that forgot to release objects after removing them from
pm_vt_switch_list. From Masami Ichikawa.
- Intel Valley View device ID and energy unit encoding update for the
(recently added) Intel RAPL (Running Average Power Limit) driver
from Jacob Pan.
- Intel Bay Trail SoC GPIO and ACPI device IDs for the Low Power
Subsystem (LPSS) ACPI driver from Paul Drews.
/
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Merge tag 'pm+acpi-3.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management fixes and new device IDs from Rafael Wysocki:
- Fix for a cpufreq regression causing stale sysfs files to be left
behind during system resume if cpufreq_add_dev() fails for one or
more CPUs from Viresh Kumar.
- Fix for a bug in cpufreq causing CONFIG_CPU_FREQ_DEFAULT_* to be
ignored when the intel_pstate driver is used from Jason Baron.
- System suspend fix for a memory leak in pm_vt_switch_unregister()
that forgot to release objects after removing them from
pm_vt_switch_list. From Masami Ichikawa.
- Intel Valley View device ID and energy unit encoding update for the
(recently added) Intel RAPL (Running Average Power Limit) driver from
Jacob Pan.
- Intel Bay Trail SoC GPIO and ACPI device IDs for the Low Power
Subsystem (LPSS) ACPI driver from Paul Drews.
* tag 'pm+acpi-3.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
powercap / RAPL: add support for ValleyView Soc
PM / sleep: Fix memory leak in pm_vt_switch_unregister().
cpufreq: Use CONFIG_CPU_FREQ_DEFAULT_* to set initial policy for setpolicy drivers
cpufreq: remove sysfs files for CPUs which failed to come back after resume
ACPI: Add BayTrail SoC GPIO and LPSS ACPI IDs
the sparse IRQ conversion, fix DRA7 console output for earlyprintk,
and fix the LDP LCD backlight when DSS is built into the kernel and
not as a loadable module.
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Merge tag 'omap-for-v3.13/intc-ldp-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
From Tony Lindgren:
Fix a regression for wrong interrupt numbers for some devices after
the sparse IRQ conversion, fix DRA7 console output for earlyprintk,
and fix the LDP LCD backlight when DSS is built into the kernel and
not as a loadable module.
* tag 'omap-for-v3.13/intc-ldp-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Fix LCD panel backlight regression for LDP legacy booting
ARM: OMAP2+: hwmod_data: fix missing OMAP_INTC_START in irq data
ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL
+ v3.13-rc5
Signed-off-by: Olof Johansson <olof@lixom.net>
* r8a7790 (R-Car H2) based Lager board
- Correct SHDI resource sizes
This bug has been present since sdhi resources were added to the r8a7790 by
8c9b1aa418 ("ARM: shmobile: r8a7790: add MMCIF and SDHI DT
templates") in v3.11-rc2.
* r8a7778 (R-Car M1) based Bock-W board
- Correct DMA mask
This resolves a regression introduced by 4dcfa60071
("ARM: DMA-API: better handing of DMA masks for coherent allocations")
in v3.12-rc1.
* r8a7740 (R-Mobile A1) based Armadillo board
- Add PWM backlight power supply
This resolves a regression introduced by 22ceeee16e
("pwm-backlight: Add power supply support") in v3.12.
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Merge tag 'renesas-fixes2-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes
From Simon Horman:
Second Round of Renesas ARM based SoC Fixes for v3.13
* r8a7790 (R-Car H2) based Lager board
- Correct SHDI resource sizes
This bug has been present since sdhi resources were added to the r8a7790 by
8c9b1aa418 ("ARM: shmobile: r8a7790: add MMCIF and SDHI DT
templates") in v3.11-rc2.
* r8a7778 (R-Car M1) based Bock-W board
- Correct DMA mask
This resolves a regression introduced by 4dcfa60071
("ARM: DMA-API: better handing of DMA masks for coherent allocations")
in v3.12-rc1.
* r8a7740 (R-Mobile A1) based Armadillo board
- Add PWM backlight power supply
This resolves a regression introduced by 22ceeee16e
("pwm-backlight: Add power supply support") in v3.12.
* tag 'renesas-fixes2-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: shmobile: r8a7790: fix shdi resource sizes
ARM: shmobile: bockw: fixup DMA mask
ARM: shmobile: armadillo: Add PWM backlight power supply
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Olof Johansson <olof@lixom.net>
After commit 88f718e3fa
"ARM: pxa: delete the custom GPIO header" a compilation
error was introduced in the PXA25x gadget driver.
An attempt to fix the problem was made in
commit b144e4ab1e
"usb: gadget: fix pxa25x compilation problems"
by explictly stating the driver needs the <mach/hardware.h>
header, which solved the compilation for a few boards,
such as the pxa255-idp and its defconfig.
However the Lubbock board has this special clause in
drivers/usb/gadget/pxa25x_udc.c:
This include file has an implicit dependency on
<mach/irqs.h> having been included before <mach/lubbock.h>
was included.
Before commit 88f718e3fa
"ARM: pxa: delete the custom GPIO header" this implicit
dependency for the pxa25x_udc compile on the Lubbock was
satisfied by <linux/gpio.h> implicitly including
<mach/gpio.h> which was in turn including <mach/irqs.h>,
apart from the earlier added <mach/hardware.h>.
Fix this by having the PXA25x <mach/lubbock.h> explicitly
include <mach/irqs.h>.
Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Greg Kroah-Hartmann <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
problems with GPMC, RNG, and ISP/IVA MMUs on OMAP2/3. The other fixes
some problems with DEBUG_LL on DRA7xx.
Basic build, boot, and PM test logs are available here:
http://www.pwsan.com/omap/testlogs/hwmod_fixes_b_v3.13-rc/20131226021920/
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Merge tag 'for-v3.13-rc/hwmod-fixes-b' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into debug-ll-and-ldp-backlight-fix
A few OMAP hwmod fixes for v3.13-rc. One patch fixes some IRQ
problems with GPMC, RNG, and ISP/IVA MMUs on OMAP2/3. The other fixes
some problems with DEBUG_LL on DRA7xx.
Basic build, boot, and PM test logs are available here:
http://www.pwsan.com/omap/testlogs/hwmod_fixes_b_v3.13-rc/20131226021920/
