fsck_err() needs the btree transaction passed to it if there is one - so
that it can unlock/relock around prompting userspace for fixing the
error.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Fsck wants to do transaction commits from an outer context; it may have
other repair to do (i.e. duplicate backpointers).
But when calling backpointer_not_found() from runtime code, i.e. runtime
self healing, we should be doing the commit - the outer context expects
to just be doing lookups.
This fixes bugs where we get stuck spinning, reported as "RCU lock hold
time warnings.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Since bch2_seek_pagecache_data() searches for dirty data, we only want
to call it for holes in the extents btree - otherwise we have an
accidental O(n^2), as we repeatedly search the same range.
Reported-by: Marcin Mirosław <marcin@mejor.pl>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
set_should_be_locked() needs to be called before peek_key_cache(), which
traverses other paths and may do a trans unlock/relock.
This fixes an assertion pop in path_peek_slot(), when the path we're
using is unexpectedly not uptodate.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Before invoking bch2_accounting_mem_mod_locked in
bch2_gc_accounting_done, we already write locked mark_lock,
in bch2_accounting_mem_insert, we lock mark_lock again.
Signed-off-by: Alan Huang <mmpgouride@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Prevent jobs that do lots of scanning (i.e. evacuatee, scrub) from
causing OOMs.
The shrinker code seems to be having issues when it doesn't do any
freeing because it's just flipping off the acccessed bit - and the
accessed bit shouldn't be set on first use anyways.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
When the journal is low on space, we might do discards from
journal_res_get() -> journal_entry_open().
Make sure we set j->can_discard correctly, so that if we're low on space
but not because discards aren't keeping up we don't livelock.
Fixes: 8e4d28036c ("bcachefs: Don't aggressively discard the journal")
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This fixes btree locking assert pops users were seeing during evacuate:
https://github.com/koverstreet/bcachefs/issues/878
May 09 22:45:02 sharon kernel: bcachefs (68116e25-fa2d-4c6f-86c7-e8b431d792ae): bch2_btree_insert_node(): node not locked at level 1
May 09 22:45:02 sharon kernel: bch2_btree_node_rewrite [bcachefs]: watermark=btree no_check_rw alloc l=0-1 mode=none nodes_written=0 cl.remaining=2 journal_seq=0
May 09 22:45:02 sharon kernel: path: idx 1 ref 1:0 S B btree=alloc level=0 pos 0:3699637:0 0:3698012:1-0:3699637:0 bch2_move_btree.isra.0+0x1db/0x490 [bcachefs] uptodate 0 locks_want 2
May 09 22:45:02 sharon kernel: l=0 locks intent seq 4 node ffff8bd700c93600
May 09 22:45:02 sharon kernel: l=1 locks unlocked seq 1712 node ffff8bd6fd5e7a00
May 09 22:45:02 sharon kernel: l=2 locks unlocked seq 2295 node ffff8bd6cc725400
May 09 22:45:02 sharon kernel: l=3 locks unlocked seq 0 node 0000000000000000
Evacuate walks btree nodes with bch2_btree_iter_next_node() and rewrites
them, bch2_btree_update_start() upgrades the path to take intent locks
as far as it needs to.
But next_node() does low level unlock/relock calls on individual nodes,
and didn't handle the case where a path is supposed to be holding
multiple intent locks. If a path has locks_want > 1, it needs to be
either holding locks on all the btree nodes (at each level) requested,
or none of them.
Fix this with a bch2_btree_path_downgrade().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Fix bch2_bkey_clear_needs_rebalance(): indirect extents are never
supposed to have bch_extent_rebalance stripped off, because that's how
we get the IO path options when we don't have the original inode it
belonged to.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We frequently use 'bcachefs list_journal -a' for debugging, as it
provides a record of all btree transactions, and a history of what
happened.
But it's not so useful if we immediately discard journal buckets right
after they're no longer dirty.
This tweaks journal reclaim to only discard when we're low on space,
keeping the journal mostly un-discarded.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
When we go emergency read-only, make sure we do a final write_super() to
persist counters and error counts - this can be critical for piecing
together what fsck was doing.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We often filter out EROFS errors to avoid log spew after an emergency
shutdown - journal_shutdown is just another emergency shutdown error.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This reverts
1fdbe0b184 bcachefs: Make sure c->vfs_sb is set before starting fs
switched up bch2_fs_get_tree() so that we got a superblock before
calling bch2_fs_start, so that c->vfs_sb would always be initialized
while the filesystem was active.
This turned out not to be necessary, because blk_holder_ops were
implemented using our own locking, not vfs locking.
And this had the side effect of creating a super_block and doing our
full recovery (including potentially fsck) before setting SB_BORN, which
causes things like sync calls to hang until our recovery is finished.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
wake_up() doesn't require a barrier - but wake_up_bit() does.
This only affected non x86, and primarily lead to lost wakeups after
btree node reads.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
There was a buggy version of bcachefs-tools which picked misaligned
bucket sizes when formatting, and we're also about to do dynamic block
sizes - which will allow picking logical block size or physical block
size of the device per-write, allowing for better compression ratios at
the cost of slightly worse write performance (i.e. forcing the device to
do RMW or extra buffering).
To account for this, tweak bch2_alloc_sectors_start() to properly align
open_buckets to the blocksize of the write we're about to do.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
If promote target isn't set, rebalance should still leave a cached copy
on the faster device.
Fall back to foreground_target if it's set, or allow a cached copy on
any device if neither are set.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bch2_stdio_redirect_vprintf() was missing a check for stdio->done, i.e.
exiting.
This caused the thread attempting to print to spin, and since it was
being called from the kthread ran by thread_with_stdio, the userspace
side hung as well.
Change it to return -EPIPE - i.e. writing to a pipe that's been closed.
Reported-by: Jan Solanti <jhs@psonet.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bch2_sb_disk_groups_to_cpu() goes off of the superblock member info, so
we need to set that first.
Reported-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We won't be root causing this in the immediate future, and it's fairly
innocuous - so just log it in the superblock.
https://github.com/koverstreet/bcachefs/issues/869
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
- Don't call bch2_trans_relock() after dir_emit(); taking a transaction
restart here will cause us to emit the same dirent to userspace twice
- Fix incorrect checking of the return value on dir_emit(): "true" means
success, keep going, but bch2_dir_emit() needs to return true when
we're finished iterating.
https://github.com/koverstreet/bcachefs/issues/867
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
We can hit this limit fairly easy when we have to reconstuct large
amounts of alloc info on large filesystems.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
If loosing a btree won't cause data loss - i.e. it's an alloc btree, or
we can easily reconstruct it - we shouldn't require user action to
continue repair.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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Merge tag 'pci-v6.15-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI fixes from Bjorn Helgaas:
- When releasing a start-aligned resource, e.g., a bridge window, save
start/end/flags for the next assignment attempt; fixes a v6.15-rc1
regression (Ilpo Järvinen)
- Move set_pcie_speed.sh from TEST_PROGS to TEST_FILE; fixes a bwctrl
selftest v6.15-rc1 regression (Ilpo Järvinen)
- Add Manivannan Sadhasivam as maintainer of native host bridge and
endpoint drivers (Manivannan Sadhasivam)
- In endpoint test driver, defer IRQ allocation from .probe() until
ioctl() to fix a regression on platforms where the Vendor/Device ID
match doesn't include driver_data (Niklas Cassel)
* tag 'pci-v6.15-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
misc: pci_endpoint_test: Defer IRQ allocation until ioctl(PCITEST_SET_IRQTYPE)
MAINTAINERS: Move Manivannan Sadhasivam as PCI Native host bridge and endpoint maintainer
selftests/pcie_bwctrl: Fix test progs list
PCI: Restore assigned resources fully after release
- Revert a v6.15 patch due to a report of SELinux test failures
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Merge tag 'nfsd-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fix from Chuck Lever:
- Revert a v6.15 patch due to a report of SELinux test failures
* tag 'nfsd-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
Revert "sunrpc: clean cache_detail immediately when flush is written frequently"
- Fix 32-bit kernel boot crash if passed physical
memory with more than 32 address bits
- Fix Xen PV crash
- Work around build bug in certain limited build environments
- Fix CTEST instruction decoding in insn_decoder_test
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 fixes from Ingo Molnar:
- Fix 32-bit kernel boot crash if passed physical memory with more than
32 address bits
- Fix Xen PV crash
- Work around build bug in certain limited build environments
- Fix CTEST instruction decoding in insn_decoder_test
* tag 'x86-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/insn: Fix CTEST instruction decoding
x86/boot: Work around broken busybox 'truncate' tool
x86/mm: Fix _pgd_alloc() for Xen PV mode
x86/e820: Discard high memory that can't be addressed by 32-bit systems
[ Arguably if pick_eevdf()/pick_next_entity() was less trusting
of complex math being correct it could have de-escalated a
crash into a warning, but that's for a different patch. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Fix sporadic crashes in dequeue_entities() due to ... bad math.
[ Arguably if pick_eevdf()/pick_next_entity() was less trusting of
complex math being correct it could have de-escalated a crash into
a warning, but that's for a different patch ]"
* tag 'sched-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/eevdf: Fix se->slice being set to U64_MAX and resulting crash
- Use POLLERR for events in error state, instead of
the ambiguous POLLHUP error value
- Fix non-sampling (counting) events on certain x86 platforms
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc perf events fixes from Ingo Molnar:
- Use POLLERR for events in error state, instead of the ambiguous
POLLHUP error value
- Fix non-sampling (counting) events on certain x86 platforms
* tag 'perf-urgent-2025-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Fix non-sampling (counting) events on certain x86 platforms
perf/core: Change to POLLERR for pinned events with error
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Merge tag 'loongarch-fixes-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch fixes from Huacai Chen:
"Add a missing Kconfig option, fix some bugs in exception handlers,
memory management and KVM"
* tag 'loongarch-fixes-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
LoongArch: KVM: Fix PMU pass-through issue if VM exits to host finally
LoongArch: KVM: Fully clear some CSRs when VM reboot
LoongArch: KVM: Fix multiple typos of KVM code
LoongArch: Return NULL from huge_pte_offset() for invalid PMD
LoongArch: Remove a bogus reference to ZONE_DMA
LoongArch: Handle fp, lsx, lasx and lbt assembly symbols
LoongArch: Make do_xyz() exception handlers more robust
LoongArch: Make regs_irqs_disabled() more clear
LoongArch: Select ARCH_USE_MEMTEST
This is a bit late as I was on holiday, but as there are no huge
structural changes I hope it's OK to include mid release cycle.
- Support for cacheinfo API to expose OpenRISC cache info via sysfs,
this also translated to some cleanups to OpenRISC cache flush and
invalidate API's
- Documentation updates for new mailing list and toolchain binaries
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Merge tag 'for-linus' of https://github.com/openrisc/linux
Pull OpenRISC updates from Stafford Horne:
- Support for cacheinfo API to expose OpenRISC cache info via sysfs,
this also translated to some cleanups to OpenRISC cache flush and
invalidate API's
- Documentation updates for new mailing list and toolchain binaries
* tag 'for-linus' of https://github.com/openrisc/linux:
Documentation: openrisc: Update toolchain binaries URL
Documentation: openrisc: Update mailing list
openrisc: Add cacheinfo support
openrisc: Introduce new utility functions to flush and invalidate caches
openrisc: Refactor struct cpuinfo_or1k to reduce duplication
