Bug 148839
| Summary: | vdso doesn't work on i686 | ||||||
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| Product: | [Fedora] Fedora | Reporter: | H.J. Lu <hongjiu.lu> | ||||
| Component: | kernel | Assignee: | Dave Jones <davej> | ||||
| Status: | CLOSED DUPLICATE | QA Contact: | Brian Brock <bbrock> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 3 | CC: | mingo, pfrields, wtogami | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | i686 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2005-04-12 00:23:24 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: | |||||||
| Attachments: |
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Description
H.J. Lu
2005-02-16 01:48:07 UTC
Created attachment 111121 [details]
Output from serial console
This is the kernel output from the serial console.
2.6.9-5.EL.hjl.0.3smp a) sounds like this should be a rhel bug b) what modifications are in this kernel ? It happened with both FC3 and RHEL 4 kernels. I just happened to have a serial cable on my RHEL 4 machine. I don't think it is unrelated to my modification. I verified it with the unmodified 2.6.10-1.766_FC3 UP and SMP kernel binary rpms. I meant to say that the crash is unrelated to my changes. I don't see how this code in sysenter.c:
addr = do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
MAP_PRIVATE, 0); current->mm->context.vdso = (void *)addr;
ti->sysenter_return = (void *)addr +
(long)&SYSENTER_RETURN_OFFSET;
if (addr != -1) { vma = find_vma(current->mm,
addr);
if (vma) {
pgprot_val(vma->vm_page_prot) &= ~_PAGE_RW;
get_page(sysenter_page);
install_page(current->mm, vma, addr,
sysenter_page, vma->vm_page_prot);
} }
will work since install_page expects a file backed page while
sysenter_page isn't backed by a file at all. Another thing,
map_vsyscall may be called before sysenter_setup such that
sysenter_page may be NULL.
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