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vm: clear map cache after kernel requests

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. fixes a dirty tlb situation (i.e. random crashes)
	  on some hardware, seemingly new intel architectures
	  (e.g. my desktop i7 machine)
This commit is contained in:
Ben Gras
2012-01-02 18:20:02 +01:00
parent 0bb4bb9d51
commit 7cd4002083
3 changed files with 26 additions and 4 deletions
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6
kernel/arch/i386/memory.c
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@@ -31,7 +31,7 @@ PUBLIC int i386_paging_enabled = 0;
PRIVATE int psok = 0;
#define FREE_PDES_PER_CPU 3
#define FREE_PDES_PER_CPU 2
#define MAX_FREEPDES (FREE_PDES_PER_CPU * CONFIG_MAX_CPUS)
PRIVATE int nfreepdes = 0, freepdes[MAX_FREEPDES];
@@ -145,7 +145,7 @@ PRIVATE int lin_lin_copy(const struct proc *srcproc, vir_bytes srclinaddr,
proc_nr_t procslot;
assert(vm_running);
assert(nfreepdes >= 3);
assert(nfreepdes >= 2);
assert(get_cpulocal_var(ptproc));
assert(get_cpulocal_var(proc_ptr));
@@ -645,7 +645,7 @@ int vm_phys_memset(phys_bytes ph, const u8_t c, phys_bytes bytes)
return OK;
}
assert(nfreepdes >= 3);
assert(nfreepdes >= 2);
assert(get_cpulocal_var(ptproc)->p_seg.p_cr3_v);