From: Ben Gras Date: Tue, 18 Sep 2012 11:17:52 +0000 (+0200) Subject: VM: restore >4k secondary cache functionality X-Git-Tag: v3.2.1~322 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.dnssec-dsfromkey.html?a=commitdiff_plain;h=ddf1981004aa4265c9425ca78b7bb6de5f83b286;p=minix.git VM: restore >4k secondary cache functionality . by storing length in the yielded blocks node again --- diff --git a/servers/vm/mmap.c b/servers/vm/mmap.c index 97fffb040..6a2470071 100644 --- a/servers/vm/mmap.c +++ b/servers/vm/mmap.c @@ -227,7 +227,7 @@ int do_unmap_phys(message *m) vmp = &vmproc[n]; - if(!(region = map_lookup(vmp, (vir_bytes) m->VMUM_ADDR))) { + if(!(region = map_lookup(vmp, (vir_bytes) m->VMUM_ADDR, NULL))) { return EINVAL; } @@ -281,7 +281,7 @@ int do_remap(message *m) * about whether the user needs to bind to * THAT address or be chosen by the system. */ - if (!(region = map_lookup(svmp, sa))) + if (!(region = map_lookup(svmp, sa, NULL))) return EINVAL; if(region->vaddr != sa) { @@ -331,7 +331,7 @@ int do_shared_unmap(message *m) addr = m->VMUN_ADDR; - if(!(vr = map_lookup(vmp, addr))) { + if(!(vr = map_lookup(vmp, addr, NULL))) { printf("VM: addr 0x%lx not found.\n", m->VMUN_ADDR); return EFAULT; } @@ -421,7 +421,7 @@ int do_munmap(message *m) assert(m->m_type == VM_MUNMAP); addr = (vir_bytes) (vir_bytes) m->VMUM_ADDR; - if(!(vr = map_lookup(vmp, addr))) { + if(!(vr = map_lookup(vmp, addr, NULL))) { printf("VM: unmap: virtual address %p not found in %d\n", m->VMUM_ADDR, vmp->vm_endpoint); return EFAULT; diff --git a/servers/vm/pagefaults.c b/servers/vm/pagefaults.c index ed789fca1..f0d1feec6 100644 --- a/servers/vm/pagefaults.c +++ b/servers/vm/pagefaults.c @@ -70,7 +70,7 @@ void do_pagefaults(message *m) assert(vmp->vm_flags & VMF_INUSE); /* See if address is valid at all. */ - if(!(region = map_lookup(vmp, addr))) { + if(!(region = map_lookup(vmp, addr, NULL))) { if(PFERR_PROT(err)) { printf("VM: pagefault: SIGSEGV %d protected addr 0x%x; %s\n", ep, addr, pf_errstr(err)); @@ -177,7 +177,7 @@ int handle_memory(struct vmproc *vmp, vir_bytes mem, vir_bytes len, int wrflag) while(len > 0) { int r; - if(!(region = map_lookup(vmp, mem))) { + if(!(region = map_lookup(vmp, mem, NULL))) { #if VERBOSE map_printmap(vmp); printf("VM: do_memory: memory doesn't exist\n"); diff --git a/servers/vm/proto.h b/servers/vm/proto.h index eb5be9f21..968c7fda1 100644 --- a/servers/vm/proto.h +++ b/servers/vm/proto.h @@ -137,7 +137,8 @@ int map_free_proc(struct vmproc *vmp); int map_proc_copy(struct vmproc *dst, struct vmproc *src); int map_proc_copy_from(struct vmproc *dst, struct vmproc *src, struct vir_region *start_src_vr); -struct vir_region *map_lookup(struct vmproc *vmp, vir_bytes addr); +struct vir_region *map_lookup(struct vmproc *vmp, vir_bytes addr, + struct phys_region **pr); int map_pf(struct vmproc *vmp, struct vir_region *region, vir_bytes offset, int write); int map_pin_memory(struct vmproc *vmp); diff --git a/servers/vm/region.c b/servers/vm/region.c index c4379667a..8d083aad9 100644 --- a/servers/vm/region.c +++ b/servers/vm/region.c @@ -813,7 +813,7 @@ static phys_bytes freeyieldednode(yielded_t *node, int freemem) /* Free associated memory if requested. */ if(freemem) { - free_mem(ABS2CLICK(node->addr), 1); + free_mem(ABS2CLICK(node->physaddr), node->pages); } /* Free node. */ @@ -875,9 +875,10 @@ struct vmproc *vmp; /*===========================================================================* * map_lookup * *===========================================================================*/ -struct vir_region *map_lookup(vmp, offset) +struct vir_region *map_lookup(vmp, offset, physr) struct vmproc *vmp; vir_bytes offset; +struct phys_region **physr; { struct vir_region *r; @@ -889,8 +890,15 @@ vir_bytes offset; #endif if((r = region_search(&vmp->vm_regions_avl, offset, AVL_LESS_EQUAL))) { - if(offset >= r->vaddr && offset < r->vaddr + r->length) + vir_bytes ph; + if(offset >= r->vaddr && offset < r->vaddr + r->length) { + ph = offset - r->vaddr; + if(physr) { + *physr = physr_search(r->phys, ph, AVL_EQUAL); + assert((*physr)->offset == ph); + } return r; + } } SANITYCHECK(SCL_FUNCTIONS); @@ -1811,7 +1819,7 @@ int map_get_phys(struct vmproc *vmp, vir_bytes addr, phys_bytes *r) struct phys_region *ph; physr_iter iter; - if (!(vr = map_lookup(vmp, addr)) || + if (!(vr = map_lookup(vmp, addr, NULL)) || (vr->vaddr != addr)) return EINVAL; @@ -1838,7 +1846,7 @@ int map_get_ref(struct vmproc *vmp, vir_bytes addr, u8_t *cnt) struct phys_region *ph; physr_iter iter; - if (!(vr = map_lookup(vmp, addr)) || + if (!(vr = map_lookup(vmp, addr, NULL)) || (vr->vaddr != addr)) return EINVAL; @@ -2082,7 +2090,7 @@ int unmap_memory(endpoint_t sour, endpoint_t dest, panic("unmap_memory: bad endpoint: %d", dest); vmd = &vmproc[p]; - vrd = map_lookup(vmd, virt_d); + vrd = map_lookup(vmd, virt_d, NULL); assert(vrd); /* Search for the first phys region in the destination process. */ @@ -2155,9 +2163,9 @@ int map_memory(endpoint_t sour, endpoint_t dest, panic("map_memory: bad endpoint: %d", dest); vmd = &vmproc[p]; - vrs = map_lookup(vms, virt_s); + vrs = map_lookup(vms, virt_s, NULL); assert(vrs); - vrd = map_lookup(vmd, virt_d); + vrd = map_lookup(vmd, virt_d, NULL); assert(vrd); /* Linear address -> offset from start of vir region. */ @@ -2185,39 +2193,19 @@ static struct phys_region * get_clean_phys_region(struct vmproc *vmp, vir_bytes vaddr, struct vir_region **ret_region) { struct vir_region *region; - vir_bytes regionoffset, mapaddr; + vir_bytes mapaddr; struct phys_region *ph; mapaddr = vaddr; - if(!(region = map_lookup(vmp, mapaddr))) { + if(!(region = map_lookup(vmp, mapaddr, &ph)) || !ph) { printf("VM: get_clean_phys_region: 0x%lx not found\n", vaddr); return NULL; } - if(!(region->flags & VR_ANON)) { - printf("VM: get_clean_phys_region: non-anon 0x%lx\n", vaddr); - return NULL; - } - assert(mapaddr >= region->vaddr); assert(mapaddr < region->vaddr + region->length); - regionoffset = mapaddr-region->vaddr; - - /* For now, only support the yielding of blocks that are - * exactly a mapped phys_region. Go get that phys_region. - * (This can be improved without changing the interface.) - */ - if(!(ph = physr_search(region->phys, regionoffset, - AVL_EQUAL))) { - printf("VM: get_clean_phys_region: exact block not found\n"); - return NULL; - } - - /* Make sure this is what we asked for. */ - assert(ph->offset == regionoffset); - /* If it's mapped more than once, make a copy. */ assert(ph->ph->refcount > 0); if(ph->ph->refcount > 1) { @@ -2235,13 +2223,15 @@ get_clean_phys_region(struct vmproc *vmp, vir_bytes vaddr, struct vir_region **r return ph; } -static int getblock(struct vmproc *vmp, u64_t id, vir_bytes vaddr) +static int getblock(struct vmproc *vmp, u64_t id, vir_bytes vaddr, int pages) { yielded_t *yb; struct phys_region *ph; struct vir_region *region; yielded_avl *avl; block_id_t blockid; + phys_bytes phaddr; + int p; /* Try to get the yielded block */ blockid.owner = vmp->vm_endpoint; @@ -2251,26 +2241,39 @@ static int getblock(struct vmproc *vmp, u64_t id, vir_bytes vaddr) return ESRCH; } - /* Get the intended phys region, make sure refcount is 1. */ - if(!(ph = get_clean_phys_region(vmp, vaddr, ®ion))) { - printf("VM: getblock: not found for %d\n", vmp->vm_endpoint); - return EINVAL; + if(yb->pages != pages) { + printf("VM: getblock: length mismatch (%d != %d)\n", + pages, yb->pages); + return EFAULT; } - assert(ph->ph->refcount == 1); + phaddr = yb->physaddr; - /* Free the block that is currently there. */ - free_mem(ABS2CLICK(ph->ph->phys), 1); + for(p = 0; p < pages; p++) { + /* Get the intended phys region, make sure refcount is 1. */ + if(!(ph = get_clean_phys_region(vmp, vaddr, ®ion))) { + printf("VM: getblock: not found for %d\n", vmp->vm_endpoint); + return EINVAL; + } - /* Set the phys block to new addr and update pagetable. */ - USE(ph->ph, ph->ph->phys = yb->addr;); - if(map_ph_writept(vmp, region, ph) != OK) { - /* Presumably it was mapped, so there is no reason - * updating should fail. - */ - panic("do_get_block: couldn't write pt"); - } + assert(ph->ph->refcount == 1); + + /* Free the block that is currently there. */ + free_mem(ABS2CLICK(ph->ph->phys), 1); + /* Set the phys block to new addr and update pagetable. */ + USE(ph->ph, ph->ph->phys = phaddr;); + if(map_ph_writept(vmp, region, ph) != OK) { + /* Presumably it was mapped, so there is no reason + * updating should fail. + */ + panic("do_get_block: couldn't write pt"); + } + + vaddr += VM_PAGE_SIZE; + phaddr += VM_PAGE_SIZE; + } + /* Forget about the yielded block and free the struct. */ freeyieldednode(yb, 0); @@ -2278,12 +2281,12 @@ static int getblock(struct vmproc *vmp, u64_t id, vir_bytes vaddr) } static int yieldblock(struct vmproc *vmp, u64_t id, - vir_bytes vaddr, yielded_t **retyb) + vir_bytes vaddr, yielded_t **retyb, int pages) { yielded_t *newyb; - vir_bytes mem_clicks, clicks; + vir_bytes mem_clicks, v, p, new_phaddr; struct vir_region *region; - struct phys_region *ph; + struct phys_region *ph = NULL, *prev_ph = NULL, *first_ph = NULL; yielded_avl *avl; block_id_t blockid; @@ -2298,12 +2301,33 @@ static int yieldblock(struct vmproc *vmp, u64_t id, return EINVAL; } - if(vaddr % VM_PAGE_SIZE) return EFAULT; + if((vaddr % VM_PAGE_SIZE) || pages < 1) return EFAULT; - if(!(ph = get_clean_phys_region(vmp, vaddr, ®ion))) { - printf("VM: do_yield_block: not found for %d\n", - vmp->vm_endpoint); - return EINVAL; + v = vaddr; + for(p = 0; p < pages; p++) { + if(!(region = map_lookup(vmp, v, &ph)) || !ph) { + printf("VM: do_yield_block: not found for %d\n", + vmp->vm_endpoint); + return EINVAL; + } + if(!(region->flags & VR_ANON)) { + printf("VM: yieldblock: non-anon 0x%lx\n", v); + return EFAULT; + } + if(ph->ph->refcount != 1) { + printf("VM: do_yield_block: mapped not once for %d\n", + vmp->vm_endpoint); + return EFAULT; + } + if(prev_ph) { + if(ph->ph->phys != prev_ph->ph->phys + VM_PAGE_SIZE) { + printf("VM: physically discontiguous yield\n"); + return EINVAL; + } + } + prev_ph = ph; + if(!first_ph) first_ph = ph; + v += VM_PAGE_SIZE; } /* Make a new block to record the yielding in. */ @@ -2313,8 +2337,7 @@ static int yieldblock(struct vmproc *vmp, u64_t id, assert(!(ph->ph->phys % VM_PAGE_SIZE)); - clicks = 1; - if((mem_clicks = alloc_mem(clicks, PAF_CLEAR)) == NO_MEM) { + if((mem_clicks = alloc_mem(pages, PAF_CLEAR)) == NO_MEM) { SLABFREE(newyb); return ENOMEM; } @@ -2322,17 +2345,28 @@ static int yieldblock(struct vmproc *vmp, u64_t id, /* Update yielded block info. */ USE(newyb, newyb->id = blockid; - newyb->addr = ph->ph->phys; + newyb->physaddr = first_ph->ph->phys; + newyb->pages = pages; newyb->younger = NULL;); + new_phaddr = CLICK2ABS(mem_clicks); + /* Set new phys block to new addr and update pagetable. */ - USE(ph->ph, - ph->ph->phys = CLICK2ABS(mem_clicks);); - if(map_ph_writept(vmp, region, ph) != OK) { - /* Presumably it was mapped, so there is no reason - * updating should fail. - */ - panic("yield_block: couldn't write pt"); + v = vaddr; + for(p = 0; p < pages; p++) { + region = map_lookup(vmp, v, &ph); + assert(region && ph); + assert(ph->ph->refcount == 1); + USE(ph->ph, + ph->ph->phys = new_phaddr;); + if(map_ph_writept(vmp, region, ph) != OK) { + /* Presumably it was mapped, so there is no reason + * updating should fail. + */ + panic("yield_block: couldn't write pt"); + } + v += VM_PAGE_SIZE; + new_phaddr += VM_PAGE_SIZE; } /* Remember yielded block. */ @@ -2425,6 +2459,7 @@ int do_yieldblockgetblock(message *m) struct vmproc *vmp; yielded_t *yb = NULL; int r = ESRCH; + int pages; if(vm_isokendpt(caller, &n) != OK) panic("do_yieldblockgetblock: message from strange source: %d", @@ -2432,13 +2467,15 @@ int do_yieldblockgetblock(message *m) vmp = &vmproc[n]; - if(m->VMYBGB_LEN != VM_PAGE_SIZE) { - static int printed = 0; + pages = m->VMYBGB_LEN / VM_PAGE_SIZE; + + if((m->VMYBGB_LEN % VM_PAGE_SIZE) || pages < 1) { + static int printed; if(!printed) { printed = 1; - printf("vm: secondary cache for non-page-sized blocks temporarily disabled\n"); + printf("vm: non-page-aligned or short block length\n"); } - return ENOSYS; + return EFAULT; } yieldid = make64(m->VMYBGB_YIELDIDLO, m->VMYBGB_YIELDIDHI); @@ -2446,12 +2483,13 @@ int do_yieldblockgetblock(message *m) if(cmp64(yieldid, VM_BLOCKID_NONE) != 0) { /* A block was given to yield. */ - yieldblock(vmp, yieldid, (vir_bytes) m->VMYBGB_VADDR, &yb); + yieldblock(vmp, yieldid, (vir_bytes) m->VMYBGB_VADDR, &yb, + pages); } if(cmp64(getid, VM_BLOCKID_NONE) != 0) { /* A block was given to get. */ - r = getblock(vmp, getid, (vir_bytes) m->VMYBGB_VADDR); + r = getblock(vmp, getid, (vir_bytes) m->VMYBGB_VADDR, pages); } return r; diff --git a/servers/vm/utility.c b/servers/vm/utility.c index 8b6e64f9f..cbec6dc1a 100644 --- a/servers/vm/utility.c +++ b/servers/vm/utility.c @@ -297,8 +297,8 @@ int swap_proc_dyn_data(struct vmproc *src_vmp, struct vmproc *dst_vmp) */ if(!is_vm) { struct vir_region *vr; - vr = map_lookup(dst_vmp, VM_STACKTOP); - if(vr && !map_lookup(src_vmp, VM_STACKTOP)) { + vr = map_lookup(dst_vmp, VM_STACKTOP, NULL); + if(vr && !map_lookup(src_vmp, VM_STACKTOP, NULL)) { #if LU_DEBUG printf("VM: swap_proc_dyn_data: tranferring regions above the stack from %d to %d\n", src_vmp->vm_endpoint, dst_vmp->vm_endpoint); diff --git a/servers/vm/yielded.h b/servers/vm/yielded.h index 9e371d7c2..565a0dc71 100644 --- a/servers/vm/yielded.h +++ b/servers/vm/yielded.h @@ -14,7 +14,8 @@ typedef struct yielded { * uniquely identify a yielded block. */ block_id_t id; - phys_bytes addr; + phys_bytes physaddr; + int pages; /* LRU fields */ struct yielded *younger, *older;