From: David Sterba <dsterba@suse.cz>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org,
Matthew Wilcox <mawilcox@microsoft.com>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@redhat.com>,
Lukas Czerner <lczerner@redhat.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Christoph Hellwig <hch@lst.de>,
Goldwyn Rodrigues <rgoldwyn@suse.com>,
Nicholas Piggin <npiggin@gmail.com>,
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>,
linux-nilfs@vger.kernel.org, Jaegeuk Kim <jaegeuk@kernel.org>,
Chao Yu <yuchao0@huawei.com>,
linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [PATCH v13 00/72] Convert page cache to XArray
Date: Tue, 12 Jun 2018 12:40:41 +0200 [thread overview]
Message-ID: <20180612104041.GB24375@twin.jikos.cz> (raw)
In-Reply-To: <20180611140639.17215-1-willy@infradead.org>
On Mon, Jun 11, 2018 at 07:05:27AM -0700, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@microsoft.com>
>
> The XArray is a replacement for the radix tree. For the moment it uses
> the same data structures, enabling a gradual replacement. This patch
> set implements the XArray and converts the page cache to use it.
>
> A version of these patches has been running under xfstests for over 48
> hours, so I have some confidence in them. The DAX changes are untested.
> This is based on next-20180608 and is available as a git tree at
> git://git.infradead.org/users/willy/linux-dax.git xarray-20180608
I've hit a crash, triggered by fstests/btrfs/141 and with ext4 on the stack.
The test itself does not use ext4, so it must be the root partition of the VM
(qemu 2G ram, 4 cpus). Other tests up to that point were ok.
[ 9875.174796] kernel BUG at fs/inode.c:513!
[ 9875.176519] invalid opcode: 0000 [#1] PREEMPT SMP
[ 9875.177532] CPU: 3 PID: 30077 Comm: 141 Not tainted 4.17.0-next-20180608-default+ #1
[ 9875.179235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.0.0-prebuilt.qemu-project.org 04/01/2014
[ 9875.181152] RIP: 0010:clear_inode+0x7a/0x90
[ 9875.185414] RSP: 0018:ffffae6b49893c40 EFLAGS: 00010086
[ 9875.186381] RAX: 0000000000000000 RBX: ffff8f427d3024a0 RCX: 0000000000000000
[ 9875.187629] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8f427d302608
[ 9875.188838] RBP: ffff8f427d302608 R08: 0000000000000000 R09: ffffffffffffffff
[ 9875.190061] R10: ffffae6b49893a28 R11: ffffffffffffffff R12: ffffffff83a338c0
[ 9875.191348] R13: ffff8f427bfd9000 R14: 000000000000011f R15: 0000000000000000
[ 9875.192750] FS: 00007fde1859ab80(0000) GS:ffff8f427fd80000(0000) knlGS:0000000000000000
[ 9875.194370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9875.195504] CR2: 000055c95307e1a0 CR3: 000000007be57000 CR4: 00000000000006e0
[ 9875.196957] Call Trace:
[ 9875.197593] ext4_clear_inode+0x16/0x80
[ 9875.198519] ext4_evict_inode+0x44/0x510
[ 9875.199458] evict+0xcd/0x190
[ 9875.200205] dispose_list+0x48/0x60
[ 9875.201050] prune_icache_sb+0x42/0x50
[ 9875.201943] super_cache_scan+0x124/0x1a0
[ 9875.202896] shrink_slab+0x1c9/0x3d0
[ 9875.203760] drop_slab_node+0x22/0x50
[ 9875.204636] drop_caches_sysctl_handler+0x47/0xb0
[ 9875.205707] proc_sys_call_handler+0xb5/0xd0
[ 9875.206671] __vfs_write+0x23/0x150
[ 9875.207322] ? set_close_on_exec+0x30/0x70
[ 9875.208062] vfs_write+0xad/0x1e0
[ 9875.208762] ksys_write+0x42/0x90
[ 9875.209487] do_syscall_64+0x4f/0xe0
[ 9875.210272] entry_SYSCALL_64_after_hwframe+0x44/0xa9
504 void clear_inode(struct inode *inode)
505 {
506 /*
507 * We have to cycle the i_pages lock here because reclaim can be in the
508 * process of removing the last page (in __delete_from_page_cache())
509 * and we must not free the mapping under it.
510 */
511 xa_lock_irq(&inode->i_data.i_pages);
512 BUG_ON(inode->i_data.nrpages);
513 BUG_ON(inode->i_data.nrexceptional);
'exceptional' is from the page cache realm so I think it's not an ext4 bug.
next prev parent reply other threads:[~2018-06-12 10:40 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-11 14:05 [PATCH v13 00/72] Convert page cache to XArray Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 01/72] radix tree test suite: Enable ubsan Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 02/72] dax: Fix use of zero page Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 03/72] xarray: Replace exceptional entries Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 04/72] xarray: Change definition of sibling entries Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 05/72] xarray: Add definition of struct xarray Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 06/72] xarray: Define struct xa_node Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 07/72] xarray: Add documentation Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 08/72] xarray: Add xa_load Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 09/72] xarray: Add XArray tags Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 10/72] xarray: Add xa_store Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 11/72] xarray: Add xa_cmpxchg and xa_insert Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 12/72] xarray: Add xa_for_each Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 13/72] xarray: Add xa_extract Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 14/72] xarray: Add xa_destroy Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 15/72] xarray: Add xas_next and xas_prev Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 16/72] xarray: Add xas_for_each_conflict Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 17/72] xarray: Add xas_create_range Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 18/72] xarray: Add MAINTAINERS entry Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 19/72] page cache: Rearrange address_space Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 20/72] page cache: Convert hole search to XArray Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 21/72] page cache: Add and replace pages using the XArray Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 22/72] page cache: Convert page deletion to XArray Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 23/72] page cache: Convert find_get_entry " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 24/72] page cache: Convert find_get_entries " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 25/72] page cache: Convert find_get_pages_range " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 26/72] page cache: Convert find_get_pages_contig " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 27/72] page cache; Convert find_get_pages_range_tag " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 28/72] page cache: Convert find_get_entries_tag " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 29/72] page cache: Convert filemap_map_pages " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 30/72] radix tree test suite: Convert regression1 " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 31/72] page cache: Convert delete_batch " Matthew Wilcox
2018-06-11 14:05 ` [PATCH v13 32/72] page cache: Remove stray radix comment Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 33/72] page cache: Convert filemap_range_has_page to XArray Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 34/72] mm: Convert page-writeback " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 35/72] mm: Convert workingset " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 36/72] mm: Convert truncate " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 37/72] mm: Convert add_to_swap_cache " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 38/72] mm: Convert delete_from_swap_cache " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 39/72] mm: Convert __do_page_cache_readahead " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 40/72] mm: Convert page migration " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 41/72] mm: Convert huge_memory " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 42/72] mm: Convert collapse_shmem " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 43/72] mm: Convert khugepaged_scan_shmem " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 44/72] mm: Convert is_page_cache_freeable " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 45/72] pagevec: Use xa_tag_t Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 46/72] shmem: Convert shmem_radix_tree_replace to XArray Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 47/72] shmem: Convert shmem_confirm_swap " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 48/72] shmem: Convert find_swap_entry " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 49/72] shmem: Convert shmem_add_to_page_cache " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 50/72] shmem: Convert shmem_alloc_hugepage " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 51/72] shmem: Convert shmem_free_swap " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 52/72] shmem: Convert shmem_partial_swap_usage " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 53/72] memfd: Convert memfd_wait_for_pins " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 54/72] memfd: Convert memfd_tag_pins " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 55/72] shmem: Comment fixups Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 56/72] btrfs: Convert page cache to XArray Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 57/72] fs: Convert buffer " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 58/72] fs: Convert writeback " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 59/72] nilfs2: Convert " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 60/72] f2fs: " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 61/72] dax: Rename some functions Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 62/72] dax: Hash on XArray instead of mapping Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 63/72] dax: Convert dax_insert_pfn_mkwrite to XArray Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 64/72] dax: Convert dax_layout_busy_page " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 65/72] dax: Convert __dax_invalidate_entry " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 66/72] dax: Convert dax writeback " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 67/72] dax: Convert page fault handlers " Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 68/72] page cache: Finish XArray conversion Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 69/72] radix tree: Remove radix_tree_update_node_t Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 70/72] radix tree: Remove split/join code Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 71/72] radix tree: Remove radix_tree_maybe_preload_order Matthew Wilcox
2018-06-11 14:06 ` [PATCH v13 72/72] radix tree: Remove radix_tree_clear_tags Matthew Wilcox
2018-06-12 10:40 ` David Sterba [this message]
2018-06-12 11:31 ` [PATCH v13 00/72] Convert page cache to XArray Matthew Wilcox
2018-06-12 19:37 ` Ross Zwisler
2018-06-12 19:46 ` Matthew Wilcox
2018-06-13 20:10 ` Ross Zwisler
2018-06-16 12:07 ` Matthew Wilcox
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