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Fix for the "files" command in Linux 4.17 and later kernels that

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contain commit b93b016313b3ba8003c3b8bb71f569af91f19fc7, titled
"page cache: use xa_lock".  Without the patch, the "files -c" option
fails with the message "files: -c option not supported or applicable
on this architecture or kernel", and the "files -p <inode>" option
fails in a similar manner.
(k-hagio@ab.jp.nec.com)
This commit is contained in:
Dave Anderson 2018-09-04 14:29:45 -04:00
parent 55f9a294c8
commit 2f57a96ce2
2 changed files with 8 additions and 2 deletions
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8
filesys.c
View File

@ -2207,6 +2207,11 @@ dump_inode_page_cache_info(ulong inode)
RJUST|LONG_DEC,
MKSTR(nrpages)));
FREEBUF(inode_buf);
if (!nrpages)
return;
root_rnode = i_mapping + OFFSET(address_space_page_tree);
rtp.index = 0;
rtp.value = (void *)&dump_inode_page;
@ -2217,7 +2222,6 @@ dump_inode_page_cache_info(ulong inode)
error(INFO, "page_tree count: %ld nrpages: %ld\n",
count, nrpages);
FREEBUF(inode_buf);
return;
}
@ -2275,7 +2279,7 @@ cmd_files(void)
return;
case 'c':
if (VALID_MEMBER(address_space_page_tree) &&
if (VALID_MEMBER(address_space_nrpages) &&
VALID_MEMBER(inode_i_mapping))
open_flags |= PRINT_NRPAGES;
else

2
memory.c
View File

@ -487,6 +487,8 @@ vm_init(void)
MEMBER_OFFSET_INIT(block_device_bd_disk, "block_device", "bd_disk");
MEMBER_OFFSET_INIT(inode_i_mapping, "inode", "i_mapping");
MEMBER_OFFSET_INIT(address_space_page_tree, "address_space", "page_tree");
if (INVALID_MEMBER(address_space_page_tree))
MEMBER_OFFSET_INIT(address_space_page_tree, "address_space", "i_pages");
MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "nrpages");
if (INVALID_MEMBER(address_space_nrpages))
MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "__nrpages");