From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- fs/unicode/README.utf8data | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 fs/unicode/README.utf8data (limited to 'fs/unicode/README.utf8data') diff --git a/fs/unicode/README.utf8data b/fs/unicode/README.utf8data new file mode 100644 index 000000000..f75567e28 --- /dev/null +++ b/fs/unicode/README.utf8data @@ -0,0 +1,57 @@ +The utf8data.c file in this directory is generated from the Unicode +Character Database for version 12.1.0 of the Unicode standard. + +The full set of files can be found here: + + http://www.unicode.org/Public/12.1.0/ucd/ + +Individual source links: + + https://www.unicode.org/Public/12.1.0/ucd/CaseFolding.txt + https://www.unicode.org/Public/12.1.0/ucd/DerivedAge.txt + https://www.unicode.org/Public/12.1.0/ucd/extracted/DerivedCombiningClass.txt + https://www.unicode.org/Public/12.1.0/ucd/DerivedCoreProperties.txt + https://www.unicode.org/Public/12.1.0/ucd/NormalizationCorrections.txt + https://www.unicode.org/Public/12.1.0/ucd/NormalizationTest.txt + https://www.unicode.org/Public/12.1.0/ucd/UnicodeData.txt + +md5sums (verify by running "md5sum -c README.utf8data"): + + 900e76da1d822a160fd6b8c0b1d70094 CaseFolding.txt + 131256380bff4fea8ad4a851616f2f10 DerivedAge.txt + e731a4089b30002144e107e3d6f8d1fa DerivedCombiningClass.txt + a47c9fbd7ff92a9b261ba9831e68778a DerivedCoreProperties.txt + fcab6dad15e440879d92f315978f93d3 NormalizationCorrections.txt + f9ff1c55a60decf436100f791b44aa98 NormalizationTest.txt + 755f6af699f8c8d2d958da411f78f6c6 UnicodeData.txt + +sha1sums (verify by running "sha1sum -c README.utf8data"): + + dc9245f6803c4ac99555c361f5052e0b13eb779b CaseFolding.txt + 3281104f237184cdb5d869e86eb8573678ada7da DerivedAge.txt + 2f5f995ccb96e0fa84b15151b35d5e2681535175 DerivedCombiningClass.txt + 5b8698a3fcd5018e1987f296b02e2c17e696415e DerivedCoreProperties.txt + cd83935fbc012345d8792d2c704f69497e753835 NormalizationCorrections.txt + ea419aae505b337b0d99a83fa83fe58ddff7c19f NormalizationTest.txt + dc973c0fc93d6f09d9ab9f70d1c9f89c447f0526 UnicodeData.txt + + +To update to the newer version of the Unicode standard, the latest +released version of the UCD can be found here: + + http://www.unicode.org/Public/UCD/latest/ + +Then, build under fs/unicode/ with REGENERATE_UTF8DATA=1: + + make REGENERATE_UTF8DATA=1 fs/unicode/ + +After sanity checking the newly generated utf8data.c file (the +version generated from the 12.1.0 UCD should be 4,109 lines long, and +have a total size of 324k) and/or comparing it with the older version +of utf8data.c_shipped, rename it to utf8data.c_shipped. + +If you are a kernel developer updating to a newer version of the +Unicode Character Database, please update this README.utf8data file +with the version of the UCD that was used, the md5sum and sha1sums of +the *.txt files, before checking in the new versions of the utf8data.c +and README.utf8data files. -- cgit v1.3.1