linux-6.6.y

Kkoishimindselftests/mincore: Allow read-ahead pages to reach the end of the file

61905650创建于 2025年5月9日历史提交

文件	最后提交记录	最后更新时间
.gitignore	selftests: add mincore() tests Add a test suite for the mincore() syscall. It tests most of its use cases as well as its interface. Tests implemented: - basic interface test - behavior on anonymous mappings - behavior on anonymous mappings with huge tlb pages - file-backed mapping with a regular file - file-backed mapping with a tmpfs file Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200728100450.4065-1-ricardo.canuelo@collabora.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	5 年前
Makefile	selftests: add mincore() tests Add a test suite for the mincore() syscall. It tests most of its use cases as well as its interface. Tests implemented: - basic interface test - behavior on anonymous mappings - behavior on anonymous mappings with huge tlb pages - file-backed mapping with a regular file - file-backed mapping with a tmpfs file Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200728100450.4065-1-ricardo.canuelo@collabora.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	5 年前
mincore_selftest.c	selftests/mincore: Allow read-ahead pages to reach the end of the file [ Upstream commit 197c1eaa7ba633a482ed7588eea6fd4aa57e08d4 ] When running the mincore_selftest on a system with an XFS file system, it failed the "check_file_mmap" test case due to the read-ahead pages reaching the end of the file. The failure log is as below: RUN global.check_file_mmap ... mincore_selftest.c:264:check_file_mmap:Expected i (1024) < vec_size (1024) mincore_selftest.c:265:check_file_mmap:Read-ahead pages reached the end of the file check_file_mmap: Test failed FAIL global.check_file_mmap This is because the read-ahead window size of the XFS file system on this machine is 4 MB, which is larger than the size from the #PF address to the end of the file. As a result, all the pages for this file are populated. blockdev --getra /dev/nvme0n1p5 8192 blockdev --getbsz /dev/nvme0n1p5 512 This issue can be fixed by extending the current FILE_SIZE 4MB to a larger number, but it will still fail if the read-ahead window size of the file system is larger enough. Additionally, in the real world, read-ahead pages reaching the end of the file can happen and is an expected behavior. Therefore, allowing read-ahead pages to reach the end of the file is a better choice for the "check_file_mmap" test case. Link: https://lore.kernel.org/r/20250311080940.21413-1-qiuxu.zhuo@intel.com Reported-by: Yi Lai <yi1.lai@intel.com> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> (cherry picked from commit 84b52a6cd01202e7f3177ed286e3f0c200bd3bcd)	1 年前