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sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
| Show First 20 Lines • Show All 475 Lines • ▼ Show 20 Lines | if ((pp = vm_page_lookup(obj, OFF_TO_IDX(start))) != NULL && | ||||
| vm_page_lock(pp); | vm_page_lock(pp); | ||||
| zfs_vmobject_wunlock(obj); | zfs_vmobject_wunlock(obj); | ||||
| vm_page_busy_sleep(pp, "zfsmwb", true); | vm_page_busy_sleep(pp, "zfsmwb", true); | ||||
| zfs_vmobject_wlock(obj); | zfs_vmobject_wlock(obj); | ||||
| continue; | continue; | ||||
| } | } | ||||
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); | ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); | ||||
| vm_page_lock(pp); | |||||
| vm_page_wire(pp); | vm_page_wire(pp); | ||||
| vm_page_unlock(pp); | |||||
| } else | } else | ||||
| pp = NULL; | pp = NULL; | ||||
| break; | break; | ||||
| } | } | ||||
| return (pp); | return (pp); | ||||
| } | } | ||||
| static void | static void | ||||
| page_unwire(vm_page_t pp) | page_unwire(vm_page_t pp) | ||||
| { | { | ||||
| vm_page_lock(pp); | |||||
| vm_page_unwire(pp, PQ_ACTIVE); | vm_page_unwire(pp, PQ_ACTIVE); | ||||
| vm_page_unlock(pp); | |||||
| } | } | ||||
| /* | /* | ||||
| * When a file is memory mapped, we must keep the IO data synchronized | * When a file is memory mapped, we must keep the IO data synchronized | ||||
| * between the DMU cache and the memory mapped pages. What this means: | * between the DMU cache and the memory mapped pages. What this means: | ||||
| * | * | ||||
| * On Write: If we find a memory mapped page, we write to *both* | * On Write: If we find a memory mapped page, we write to *both* | ||||
| * the page and the dmu buffer. | * the page and the dmu buffer. | ||||
| ▲ Show 20 Lines • Show All 77 Lines • ▼ Show 20 Lines | if (pp->valid == 0) { | ||||
| va = zfs_map_page(pp, &sf); | va = zfs_map_page(pp, &sf); | ||||
| error = dmu_read(os, zp->z_id, start, bytes, va, | error = dmu_read(os, zp->z_id, start, bytes, va, | ||||
| DMU_READ_PREFETCH); | DMU_READ_PREFETCH); | ||||
| if (bytes != PAGESIZE && error == 0) | if (bytes != PAGESIZE && error == 0) | ||||
| bzero(va + bytes, PAGESIZE - bytes); | bzero(va + bytes, PAGESIZE - bytes); | ||||
| zfs_unmap_page(sf); | zfs_unmap_page(sf); | ||||
| zfs_vmobject_wlock(obj); | zfs_vmobject_wlock(obj); | ||||
| vm_page_sunbusy(pp); | vm_page_sunbusy(pp); | ||||
| vm_page_lock(pp); | |||||
| if (error) { | if (error) { | ||||
| if (!vm_page_wired(pp) && pp->valid == 0 && | if (!vm_page_busied(pp) && !vm_page_wired(pp) && | ||||
| !vm_page_busied(pp)) | pp->valid == 0) | ||||
| vm_page_free(pp); | vm_page_free(pp); | ||||
| } else { | } else { | ||||
| pp->valid = VM_PAGE_BITS_ALL; | pp->valid = VM_PAGE_BITS_ALL; | ||||
| vm_page_lock(pp); | |||||
| vm_page_activate(pp); | vm_page_activate(pp); | ||||
| } | |||||
| vm_page_unlock(pp); | vm_page_unlock(pp); | ||||
| } | |||||
| } else { | } else { | ||||
| ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); | ASSERT3U(pp->valid, ==, VM_PAGE_BITS_ALL); | ||||
| vm_page_sunbusy(pp); | vm_page_sunbusy(pp); | ||||
| } | } | ||||
| if (error) | if (error) | ||||
| break; | break; | ||||
| uio->uio_resid -= bytes; | uio->uio_resid -= bytes; | ||||
| uio->uio_offset += bytes; | uio->uio_offset += bytes; | ||||
| ▲ Show 20 Lines • Show All 5,456 Lines • Show Last 20 Lines | |||||