Displaying 20 results from an estimated 59 matches for "pgd_free".
2007 Apr 18
2
pgd_alloc and [cd]tors
Is there any real use in having a ctor/dtor for the pgd cache? Given
that all pgd allocation happens via pgd_alloc/pgd_free, why not just
fold the [cd]tor in?
I'm asking because Xen wants pgd[3] to be unshared in the PAE case, and
it looks to me like the easiest way to handle that is by making
pgd_alloc/free pv-ops and doing the appropriate thing in the Xen code.
Would need to sort out the vmalloc mapping replicat...
2007 Apr 18
2
pgd_alloc and [cd]tors
Is there any real use in having a ctor/dtor for the pgd cache? Given
that all pgd allocation happens via pgd_alloc/pgd_free, why not just
fold the [cd]tor in?
I'm asking because Xen wants pgd[3] to be unshared in the PAE case, and
it looks to me like the easiest way to handle that is by making
pgd_alloc/free pv-ops and doing the appropriate thing in the Xen code.
Would need to sort out the vmalloc mapping replicat...
2011 May 19
1
Centos 5.6 kernel errors
...o major problems.
How do I make sense of these kernel errors? Any help will be greatly
appreciated, as I'm now had to roll back to an old copy of CentOS to keep my
systems stable.
Random Cron:
14857 kernel: Oops: 0003 [#3]
14857 kernel: SMP
14857 kernel: CPU: 0
14857 kernel: EIP is at pgd_free+0x104/0x140
14857 kernel: eax: 00000000 ebx: 00000000 ecx: 00000400 edx: 80000003
14857 kernel: esi: e8caa000 edi: e8caa000 ebp: e8cffd68 esp: e8cffd48
14857 kernel: ds: 007b es: 007b ss: 0069
14857 kernel: Process crond (pid: 2620, threadinfo=e8cfe000 task=e9419550)
14857 kern...
2007 Mar 16
4
Re: Fwd: Re: struct page field arrangement
Btw., another question that made me wonder already when doing the
original patch: why is it that x86-64 properly uses locking for mm_pin_all(),
yet i386 doesn''t need to?
Jan
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2009 Mar 26
1
[PATCH 3/5] lguest: avoid accidental recycling of pgdir pages
...bdf0b 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -540,6 +551,13 @@ static void lguest_flush_tlb_kernel(void)
lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0);
}
+/* This routine is called when a process exits, and we're throwing away the
+ * page table. */
+static void lguest_pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ lazy_hcall(LHCALL_INVALIDATE_PGTABLE, __pa(pgd), 0, 0);
+}
+
/*
* The Unadvanced Programmable Interrupt Controller.
*
@@ -1018,6 +1046,7 @@ __init void lguest_init(void)
pv_mmu_ops.lazy_mode.leave = lguest_leave_lazy_mode;
pv_mmu_ops.pte_update = lgue...
2009 Mar 26
1
[PATCH 3/5] lguest: avoid accidental recycling of pgdir pages
...bdf0b 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -540,6 +551,13 @@ static void lguest_flush_tlb_kernel(void)
lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0);
}
+/* This routine is called when a process exits, and we're throwing away the
+ * page table. */
+static void lguest_pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ lazy_hcall(LHCALL_INVALIDATE_PGTABLE, __pa(pgd), 0, 0);
+}
+
/*
* The Unadvanced Programmable Interrupt Controller.
*
@@ -1018,6 +1046,7 @@ __init void lguest_init(void)
pv_mmu_ops.lazy_mode.leave = lguest_leave_lazy_mode;
pv_mmu_ops.pte_update = lgue...
2007 Apr 18
15
[PATCH 0 of 13] Basic infrastructure patches for a paravirtualized kernel
...appropriately named...
Hooks:
5/13: Replace sensitive instructions with macros
7/13: Make __FIXADDR_TOP variable to allow it to make space...
8/13: Add a bootparameter to reserve high linear address...
11/13: Add lazy MMU mode hooks for batching PTE updates
12/13: Pass the mm struct into the pgd_free code so the mm...
Probably the most subtle changes here are 11/13 and 9/13, since they
add a new constraint to page-table manipulation code. In a
paravirtualized system, pte updates may be batched and performed
lazily, so their effects will not be immediately visible on the pte
itself. To avoid...
2007 Apr 18
15
[PATCH 0 of 13] Basic infrastructure patches for a paravirtualized kernel
...appropriately named...
Hooks:
5/13: Replace sensitive instructions with macros
7/13: Make __FIXADDR_TOP variable to allow it to make space...
8/13: Add a bootparameter to reserve high linear address...
11/13: Add lazy MMU mode hooks for batching PTE updates
12/13: Pass the mm struct into the pgd_free code so the mm...
Probably the most subtle changes here are 11/13 and 9/13, since they
add a new constraint to page-table manipulation code. In a
paravirtualized system, pte updates may be batched and performed
lazily, so their effects will not be immediately visible on the pte
itself. To avoid...
2007 Apr 18
1
[PATCH 1/5] Add pagetable allocation notifiers
...}
return pgd;
out_oom:
- for (i--; i >= 0; i--)
+ for (i--; i >= 0; i--) {
+ ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -261,8 +266,10 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ ClearPagePDE(pfn_to_page(...
2007 Apr 18
1
[PATCH 1/5] Add pagetable allocation notifiers
...}
return pgd;
out_oom:
- for (i--; i >= 0; i--)
+ for (i--; i >= 0; i--) {
+ ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -261,8 +266,10 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ ClearPagePDE(pfn_to_page(...
2007 Apr 18
0
[PATCH 2/2] Use page present for pae pdpes
...= 0; i--) {
ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i]) & PAGE_MASK));
}
kmem_cache_free(pgd_cache, pgd);
return NULL;
@@ -268,7 +268,7 @@ void pgd_free(pgd_t *pgd)
if (PTRS_PER_PMD > 1)
for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i]) & PAGE_MASK));...
2007 Apr 18
0
[PATCH 2/2] Use page present for pae pdpes
...= 0; i--) {
ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i]) & PAGE_MASK));
}
kmem_cache_free(pgd_cache, pgd);
return NULL;
@@ -268,7 +268,7 @@ void pgd_free(pgd_t *pgd)
if (PTRS_PER_PMD > 1)
for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
ClearPagePDE(pfn_to_page(pgd_val(pgd[i]) >> PAGE_SHIFT));
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i]) & PAGE_MASK));...
2007 Apr 18
0
[PATCH 1/5] Paravirt page alloc.patch
...(pgd_val(pgd[i])-1));
+ for (i--; i >= 0; i--) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd);
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -291,8 +303,12 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ pgd_t pgdent = pgd[i];
+...
2007 Apr 18
0
[PATCH 1/5] Paravirt page alloc.patch
...(pgd_val(pgd[i])-1));
+ for (i--; i >= 0; i--) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd);
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -291,8 +303,12 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ pgd_t pgdent = pgd[i];
+...
2015 Nov 17
1
[PATCH] paravirt: remove paravirt ops pmd_update_defer and pte_update_defer
...161db..896dc14 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2436,7 +2436,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.flush_tlb_others = xen_flush_tlb_others,
.pte_update = paravirt_nop,
- .pte_update_defer = paravirt_nop,
.pgd_alloc = xen_pgd_alloc,
.pgd_free = xen_pgd_free,
--
2.6.2
2015 Nov 17
1
[PATCH] paravirt: remove paravirt ops pmd_update_defer and pte_update_defer
...161db..896dc14 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2436,7 +2436,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.flush_tlb_others = xen_flush_tlb_others,
.pte_update = paravirt_nop,
- .pte_update_defer = paravirt_nop,
.pgd_alloc = xen_pgd_alloc,
.pgd_free = xen_pgd_free,
--
2.6.2
2015 Nov 17
0
[PATCH] paravirt: remove paravirt ops pmd_update[_defer] and pte_update_defer
...161db..896dc14 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2436,7 +2436,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.flush_tlb_others = xen_flush_tlb_others,
.pte_update = paravirt_nop,
- .pte_update_defer = paravirt_nop,
.pgd_alloc = xen_pgd_alloc,
.pgd_free = xen_pgd_free,
--
2.6.2
2015 Nov 17
0
[PATCH] paravirt: remove paravirt ops pmd_update[_defer] and pte_update_defer
...161db..896dc14 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2436,7 +2436,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.flush_tlb_others = xen_flush_tlb_others,
.pte_update = paravirt_nop,
- .pte_update_defer = paravirt_nop,
.pgd_alloc = xen_pgd_alloc,
.pgd_free = xen_pgd_free,
--
2.6.2
2007 Apr 18
0
[PATCH 1/6] Page allocation hooks for VMI backend
...(pgd_val(pgd[i])-1));
+ for (i--; i >= 0; i--) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd);
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -291,8 +303,12 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ pgd_t pgdent = pgd[i];
+...
2007 Apr 18
0
[PATCH 1/6] Page allocation hooks for VMI backend
...(pgd_val(pgd[i])-1));
+ for (i--; i >= 0; i--) {
+ pgd_t pgdent = pgd[i];
+ void* pmd = (void *)__va(pgd_val(pgdent)-1);
+ paravirt_release_pd(__pa(pmd) >> PAGE_SHIFT);
+ kmem_cache_free(pmd_cache, pmd);
+ }
kmem_cache_free(pgd_cache, pgd);
return NULL;
}
@@ -291,8 +303,12 @@ void pgd_free(pgd_t *pgd)
/* in the PAE case user pgd entries are overwritten before usage */
if (PTRS_PER_PMD > 1)
- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
- kmem_cache_free(pmd_cache, (void *)__va(pgd_val(pgd[i])-1));
+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
+ pgd_t pgdent = pgd[i];
+...