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Fix string and memory function tuning on small systems (#2213907)

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Related: #2213907
This commit is contained in:
Carlos O'Donell 2023-08-15 12:07:37 -04:00
parent 5d55f30bfc
commit c7fe751949
2 changed files with 42 additions and 1 deletions
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37
glibc-rh2213907-7.patch Normal file
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@ -0,0 +1,37 @@
commit 885a7f0feee951f514a121788f46f33b2867110f
Author: Noah Goldstein <goldstein.w.n@gmail.com>
Date: Fri Aug 11 12:29:11 2023 -0500
x86: Fix incorrect scope of setting `shared_per_thread` [BZ# 30745]
The:
```
if (shared_per_thread > 0 && threads > 0)
shared_per_thread /= threads;
```
Code was accidentally moved to inside the else scope. This doesn't
match how it was previously (before af992e7abd).
This patch fixes that by putting the division after the `else` block.
diff --git a/sysdeps/x86/dl-cacheinfo.h b/sysdeps/x86/dl-cacheinfo.h
index aed1a7be56610e99..f950e488cfbe42dd 100644
--- a/sysdeps/x86/dl-cacheinfo.h
+++ b/sysdeps/x86/dl-cacheinfo.h
@@ -770,11 +770,10 @@ get_common_cache_info (long int *shared_ptr, long int * shared_per_thread_ptr, u
level. */
threads = ((cpu_features->features[CPUID_INDEX_1].cpuid.ebx >> 16)
& 0xff);
-
- /* Get per-thread size of highest level cache. */
- if (shared_per_thread > 0 && threads > 0)
- shared_per_thread /= threads;
}
+ /* Get per-thread size of highest level cache. */
+ if (shared_per_thread > 0 && threads > 0)
+ shared_per_thread /= threads;
}
/* Account for non-inclusive L2 and L3 caches. */

6
glibc.spec
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@ -155,7 +155,7 @@ end \
Summary: The GNU libc libraries
Name: glibc
Version: %{glibcversion}
Release: 81%{?dist}
Release: 82%{?dist}
# In general, GPLv2+ is used by programs, LGPLv2+ is used for
# libraries.
@ -746,6 +746,7 @@ Patch505: glibc-rh2213907-6.patch
Patch506: glibc-rh2166710-2.patch
Patch507: glibc-rh2166710-3.patch
Patch508: glibc-rh2222188-6.patch
Patch509: glibc-rh2213907-7.patch
##############################################################################
# Continued list of core "glibc" package information:
@ -2903,6 +2904,9 @@ update_gconv_modules_cache ()
%endif
%changelog
* Tue Aug 15 2023 Carlos O'Donell <carlos@redhat.com> - 2.34-82
- Fix string and memory function tuning on small systems (#2213907)
* Mon Aug 14 2023 Florian Weimer <fweimer@redhat.com> - 2.34-81
- Fix additional GCC 13 build issue (#2222188)