Revision df9576def004d2cd5beedc00cb6e8901427634b9 authored by Yang Shi on 03 August 2019, 04:48:37 UTC, committed by Linus Torvalds on 03 August 2019, 14:02:00 UTC
When running ltp's oom test with kmemleak enabled, the below warning was triggerred since kernel detects __GFP_NOFAIL & ~__GFP_DIRECT_RECLAIM is passed in: WARNING: CPU: 105 PID: 2138 at mm/page_alloc.c:4608 __alloc_pages_nodemask+0x1c31/0x1d50 Modules linked in: loop dax_pmem dax_pmem_core ip_tables x_tables xfs virtio_net net_failover virtio_blk failover ata_generic virtio_pci virtio_ring virtio libata CPU: 105 PID: 2138 Comm: oom01 Not tainted 5.2.0-next-20190710+ #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014 RIP: 0010:__alloc_pages_nodemask+0x1c31/0x1d50 ... kmemleak_alloc+0x4e/0xb0 kmem_cache_alloc+0x2a7/0x3e0 mempool_alloc_slab+0x2d/0x40 mempool_alloc+0x118/0x2b0 bio_alloc_bioset+0x19d/0x350 get_swap_bio+0x80/0x230 __swap_writepage+0x5ff/0xb20 The mempool_alloc_slab() clears __GFP_DIRECT_RECLAIM, however kmemleak has __GFP_NOFAIL set all the time due to d9570ee3bd1d4f2 ("kmemleak: allow to coexist with fault injection"). But, it doesn't make any sense to have __GFP_NOFAIL and ~__GFP_DIRECT_RECLAIM specified at the same time. According to the discussion on the mailing list, the commit should be reverted for short term solution. Catalin Marinas would follow up with a better solution for longer term. The failure rate of kmemleak metadata allocation may increase in some circumstances, but this should be expected side effect. Link: http://lkml.kernel.org/r/1563299431-111710-1-git-send-email-yang.shi@linux.alibaba.com Fixes: d9570ee3bd1d4f2 ("kmemleak: allow to coexist with fault injection") Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: David Rientjes <rientjes@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Qian Cai <cai@lca.pw> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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Kconfig | -rw-r--r-- | 7.8 KB |
Makefile | -rw-r--r-- | 891 bytes |
block.c | -rw-r--r-- | 4.9 KB |
cache.c | -rw-r--r-- | 11.0 KB |
decompressor.c | -rw-r--r-- | 3.3 KB |
decompressor.h | -rw-r--r-- | 1.3 KB |
decompressor_multi.c | -rw-r--r-- | 4.5 KB |
decompressor_multi_percpu.c | -rw-r--r-- | 2.2 KB |
decompressor_single.c | -rw-r--r-- | 1.7 KB |
dir.c | -rw-r--r-- | 5.2 KB |
export.c | -rw-r--r-- | 4.0 KB |
file.c | -rw-r--r-- | 13.5 KB |
file_cache.c | -rw-r--r-- | 887 bytes |
file_direct.c | -rw-r--r-- | 4.1 KB |
fragment.c | -rw-r--r-- | 2.6 KB |
id.c | -rw-r--r-- | 2.3 KB |
inode.c | -rw-r--r-- | 11.8 KB |
lz4_wrapper.c | -rw-r--r-- | 2.8 KB |
lzo_wrapper.c | -rw-r--r-- | 2.4 KB |
namei.c | -rw-r--r-- | 6.8 KB |
page_actor.c | -rw-r--r-- | 2.5 KB |
page_actor.h | -rw-r--r-- | 1.9 KB |
squashfs.h | -rw-r--r-- | 3.4 KB |
squashfs_fs.h | -rw-r--r-- | 10.3 KB |
squashfs_fs_i.h | -rw-r--r-- | 764 bytes |
squashfs_fs_sb.h | -rw-r--r-- | 1.5 KB |
super.c | -rw-r--r-- | 12.9 KB |
symlink.c | -rw-r--r-- | 3.0 KB |
xattr.c | -rw-r--r-- | 6.7 KB |
xattr.h | -rw-r--r-- | 923 bytes |
xattr_id.c | -rw-r--r-- | 2.0 KB |
xz_wrapper.c | -rw-r--r-- | 3.6 KB |
zlib_wrapper.c | -rw-r--r-- | 2.4 KB |
zstd_wrapper.c | -rw-r--r-- | 2.9 KB |
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