Bug 161527
| Summary: | /proc/cpuinfo reports cache size is "0" | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 3 | Reporter: | Terry J Holt <tholt> |
| Component: | kernel | Assignee: | Brian Maly <bmaly> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3.0 | CC: | jparadis, kzak, nhorman, petrides |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | ia32e | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-06-28 18:55:06 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Terry J Holt
2005-06-23 23:12:16 UTC
Please provide the kernel version that you are using. A fix went into U5 (for Intel Irwindale processors) to add table entries for cache descriptor codes 0x7D and 0x7F. If you happen to know the cache descriptor code for the processor(s) in your system, that would also be helpful. (The related code is in init_intel() in arch/x86_64/kernel/setup.c.) Thanks in advance. If that patch, doesn't solve the problem. The output of this utiltiy: http://www.ka9q.net/code/cpuid/cpuid-3.3.tar.gz Would be helpful in determining what we need to change here. heyburn:/proc #11 cat /proc/version Linux version 2.4.21-4.ELsmp (bhcompile.redhat.com) (gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)) #1 SMP Fri Oct 3 17:52:56 EDT 2003 heyburn:/proc #12 uname -m i686 Lines that match 'cache' in: /usr/src/linux-2.4.21-4.EL/arch/x86_64/kernel/setup.c static void __init display_cacheinfo(struct cpuinfo_x86 *c) c->x86_cache_size=(ecx>>24)+(edx>>24) c->x86_cache_size = ecx_2 >> 16 (not sure if I am providing you with the correct info. Pls. advise Terry, I can't believe you're using a kernel released more than a year and a half ago! Please upgrade to a recent kernel and post your results. I believe the cache info stuff was added in U2 (and we've already released U5 plus an E6 security erratum). The latest released kernel version is 2.4.21-32.0.1.EL. The associated RHN advisory is RHSA-2005:472. Thanks. -ernie Yup, that did it. Linux heyburn 2.4.21-32.0.1.ELsmp #1 SMP Tue May 17 17:52:23 EDT 2005 i686 i686 i386 GNU/Linux [tjh@heyburn tjh]# grep cache /proc/cpuinfo cache size : 2048 KB My apologies Ernie. I'm a bit of a novice at Linux (for the short time being). My background is 20yrs of UNIX (Solaris, SunOS, HPUX, BSD) so I am stumbling a bit to get up to speed here. I have old installations cd set apparently so will have to check about updates and the like each time I load one. Many thanks for your help, guidance, & patience. I believe we can close this item. Regards, -'T.- No problem, Terry. One of the key values of Red Hat's service is RHN (Red Hat Network), which allows you to automatically upgrade your systems. I'll close this BZ appropriately. A fix for this problem was committed to the RHEL3 U5 patch pool on 3-Feb-2005 (in kernel version 2.4.21-27.11.EL). This is really a dup of bug 145775, but I'm not closing this as a DUP because that other one has restricted access. Following is the Errata System message that accompanied the release of U5 (although the latest RHEL3 kernel advisory is now RHSA-2005:472): "An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2005-294.html" |