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* sysdeps/x86_64/cacheinfo.c (init_cacheinfo): Work around problem

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with some Pentium Ds.
This commit is contained in:
Ulrich Drepper 2007-10-10 01:22:45 +00:00
parent 7753717472
commit 5a01ab7b83
3 changed files with 13 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2007-10-09 Ulrich Drepper <drepper@redhat.com>
* sysdeps/x86_64/cacheinfo.c (init_cacheinfo): Work around problem
with some Pentium Ds.
2007-10-08 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/eventfd_read.c (eventfd_read): Use

1
localedata/locales/de_DE
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@ -120,7 +120,6 @@ day "<U0053><U006F><U006E><U006E><U0074><U0061><U0067>";/
"<U0044><U006F><U006E><U006E><U0065><U0072><U0073><U0074><U0061><U0067>";/
"<U0046><U0072><U0065><U0069><U0074><U0061><U0067>";/
"<U0053><U0061><U006D><U0073><U0074><U0061><U0067>"
week 7;19971201;4
abmon "<U004A><U0061><U006E>";"<U0046><U0065><U0062>";/
"<U004D><U00E4><U0072>";"<U0041><U0070><U0072>";/
"<U004D><U0061><U0069>";"<U004A><U0075><U006E>";/

8
sysdeps/x86_64/cacheinfo.c
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@ -456,6 +456,13 @@ init_cacheinfo (void)
asm volatile ("cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
: "0" (4), "2" (i++));
/* There seems to be a bug in at least some Pentium Ds
which sometimes fail to iterate all cache parameters.
Do not loop indefinitely here, stop in this case and
assume there is no such information. */
if ((eax & 0x1f) == 0)
goto intel_bug_no_cache_info;
}
while (((eax >> 5) & 0x7) != level);
@ -463,6 +470,7 @@ init_cacheinfo (void)
}
else
{
intel_bug_no_cache_info:
/* Assume that all logical threads share the highest cache level. */
asm volatile ("cpuid"
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)