https://github.com/torvalds/linux
Revision 7e09e738afd21ef99f047425fc0b0c9be8b03254 authored by Hugh Dickins on 21 March 2014, 04:52:17 UTC, committed by Linus Torvalds on 21 March 2014, 05:09:09 UTC
Add remove_linear_migration_ptes_from_nonlinear(), to fix an interesting little include/linux/swapops.h:131 BUG_ON(!PageLocked) found by trinity: indicating that remove_migration_ptes() failed to find one of the migration entries that was temporarily inserted. The problem comes from remap_file_pages()'s switch from vma_interval_tree (good for inserting the migration entry) to i_mmap_nonlinear list (no good for locating it again); but can only be a problem if the remap_file_pages() range does not cover the whole of the vma (zap_pte() clears the range). remove_migration_ptes() needs a file_nonlinear method to go down the i_mmap_nonlinear list, applying linear location to look for migration entries in those vmas too, just in case there was this race. The file_nonlinear method does need rmap_walk_control.arg to do this; but it never needed vma passed in - vma comes from its own iteration. Reported-and-tested-by: Dave Jones <davej@redhat.com> Reported-and-tested-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 3fb725c
Tip revision: 7e09e738afd21ef99f047425fc0b0c9be8b03254 authored by Hugh Dickins on 21 March 2014, 04:52:17 UTC
mm: fix swapops.h:131 bug if remap_file_pages raced migration
mm: fix swapops.h:131 bug if remap_file_pages raced migration
Tip revision: 7e09e73
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Makefile.fwinst | -rw-r--r-- | 2.0 KB |
Makefile.headersinst | -rw-r--r-- | 4.7 KB |
Makefile.help | -rw-r--r-- | 68 bytes |
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Makefile.lib | -rw-r--r-- | 13.5 KB |
Makefile.modbuiltin | -rw-r--r-- | 1.8 KB |
Makefile.modinst | -rw-r--r-- | 1.2 KB |
Makefile.modpost | -rw-r--r-- | 5.2 KB |
Makefile.modsign | -rw-r--r-- | 1003 bytes |
analyze_suspend.py | -rwxr-xr-x | 47.9 KB |
asn1_compiler.c | -rw-r--r-- | 33.8 KB |
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bloat-o-meter | -rwxr-xr-x | 1.8 KB |
bootgraph.pl | -rw-r--r-- | 5.6 KB |
checkincludes.pl | -rwxr-xr-x | 1.8 KB |
checkkconfigsymbols.sh | -rwxr-xr-x | 1.8 KB |
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checkstack.pl | -rwxr-xr-x | 5.3 KB |
checksyscalls.sh | -rwxr-xr-x | 5.5 KB |
checkversion.pl | -rwxr-xr-x | 1.9 KB |
cleanfile | -rwxr-xr-x | 3.4 KB |
cleanpatch | -rwxr-xr-x | 5.0 KB |
coccicheck | -rwxr-xr-x | 4.6 KB |
config | -rwxr-xr-x | 4.5 KB |
conmakehash.c | -rw-r--r-- | 6.0 KB |
decodecode | -rwxr-xr-x | 2.1 KB |
depmod.sh | -rwxr-xr-x | 1.7 KB |
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export_report.pl | -rw-r--r-- | 4.5 KB |
extract-ikconfig | -rwxr-xr-x | 1.6 KB |
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gcc-goto.sh | -rw-r--r-- | 495 bytes |
gcc-version.sh | -rw-r--r-- | 822 bytes |
gcc-x86_32-has-stack-protector.sh | -rw-r--r-- | 184 bytes |
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gen_initramfs_list.sh | -rw-r--r-- | 7.9 KB |
get_maintainer.pl | -rwxr-xr-x | 56.8 KB |
gfp-translate | -rwxr-xr-x | 1.7 KB |
headerdep.pl | -rwxr-xr-x | 3.5 KB |
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headers_check.pl | -rw-r--r-- | 3.6 KB |
headers_install.sh | -rw-r--r-- | 1.3 KB |
kallsyms.c | -rw-r--r-- | 15.8 KB |
kernel-doc | -rwxr-xr-x | 71.6 KB |
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markup_oops.pl | -rw-r--r-- | 8.1 KB |
mkcompile_h | -rwxr-xr-x | 2.5 KB |
mkmakefile | -rw-r--r-- | 1.2 KB |
mksysmap | -rw-r--r-- | 1.3 KB |
mkuboot.sh | -rwxr-xr-x | 379 bytes |
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module-common.lds | -rw-r--r-- | 737 bytes |
namespace.pl | -rwxr-xr-x | 13.0 KB |
patch-kernel | -rwxr-xr-x | 9.9 KB |
pnmtologo.c | -rw-r--r-- | 11.9 KB |
profile2linkerlist.pl | -rw-r--r-- | 375 bytes |
recordmcount.c | -rw-r--r-- | 12.4 KB |
recordmcount.h | -rw-r--r-- | 16.3 KB |
recordmcount.pl | -rwxr-xr-x | 17.7 KB |
setlocalversion | -rwxr-xr-x | 3.9 KB |
show_delta | -rwxr-xr-x | 3.0 KB |
sign-file | -rwxr-xr-x | 12.2 KB |
sortextable.c | -rw-r--r-- | 7.5 KB |
sortextable.h | -rw-r--r-- | 5.5 KB |
tags.sh | -rwxr-xr-x | 9.5 KB |
unifdef.c | -rw-r--r-- | 34.8 KB |
ver_linux | -rwxr-xr-x | 3.1 KB |
xz_wrap.sh | -rw-r--r-- | 562 bytes |
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