diff options
| -rw-r--r-- | sys/kern/imgact_aout.c | 4 | ||||
| -rw-r--r-- | sys/kern/imgact_elf.c | 4 | ||||
| -rw-r--r-- | sys/kern/kern_subr.c | 4 | ||||
| -rw-r--r-- | sys/kern/vfs_vnops.c | 5 | ||||
| -rw-r--r-- | sys/sys/uio.h | 1 |
5 files changed, 10 insertions, 8 deletions
diff --git a/sys/kern/imgact_aout.c b/sys/kern/imgact_aout.c index 3ec8f5f..5a53581 100644 --- a/sys/kern/imgact_aout.c +++ b/sys/kern/imgact_aout.c @@ -269,14 +269,14 @@ aout_coredump(td, vp, limit) error = vn_rdwr(UIO_WRITE, vp, vm->vm_daddr, (int)ctob(vm->vm_dsize), (off_t)ctob(UAREA_PAGES + KSTACK_PAGES), UIO_USERSPACE, - IO_UNIT, cred, (int *) NULL, td); + IO_UNIT | IO_DIRECT, cred, (int *) NULL, td); if (error == 0) error = vn_rdwr_inchunks(UIO_WRITE, vp, (caddr_t) trunc_page(USRSTACK - ctob(vm->vm_ssize)), round_page(ctob(vm->vm_ssize)), (off_t)ctob(UAREA_PAGES + KSTACK_PAGES) + ctob(vm->vm_dsize), UIO_USERSPACE, - IO_UNIT, cred, (int *) NULL, td); + IO_UNIT | IO_DIRECT, cred, (int *) NULL, td); return (error); } diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c index 66a3a34..d7a27ba 100644 --- a/sys/kern/imgact_elf.c +++ b/sys/kern/imgact_elf.c @@ -802,7 +802,7 @@ elf_coredump(td, vp, limit) error = vn_rdwr_inchunks(UIO_WRITE, vp, (caddr_t)php->p_vaddr, php->p_filesz, offset, UIO_USERSPACE, - IO_UNIT, cred, (int *)NULL, curthread); /* XXXKSE */ + IO_UNIT | IO_DIRECT, cred, (int *)NULL, curthread); /* XXXKSE */ if (error != 0) break; offset += php->p_filesz; @@ -966,7 +966,7 @@ elf_corehdr(td, vp, cred, numsegs, hdr, hdrsize) /* Write it to the core file. */ return vn_rdwr_inchunks(UIO_WRITE, vp, hdr, hdrsize, (off_t)0, - UIO_SYSSPACE, IO_UNIT, cred, NULL, td); /* XXXKSE */ + UIO_SYSSPACE, IO_UNIT | IO_DIRECT, cred, NULL, td); /* XXXKSE */ } static void diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c index 9f53d2d..cab78c2 100644 --- a/sys/kern/kern_subr.c +++ b/sys/kern/kern_subr.c @@ -55,8 +55,6 @@ #include <vm/vm_page.h> #include <vm/vm_map.h> -static void uio_yield __P((void)); - SYSCTL_INT(_kern, KERN_IOV_MAX, iov_max, CTLFLAG_RD, NULL, UIO_MAXIOV, "Maximum number of elements in an I/O vector; sysconf(_SC_IOV_MAX)"); @@ -381,7 +379,7 @@ phashinit(elements, type, nentries) return (hashtbl); } -static void +void uio_yield() { struct thread *td; diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index b3160b1..2a2bd83 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -338,7 +338,9 @@ vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, td) * Package up an I/O request on a vnode into a uio and do it. The I/O * request is split up into smaller chunks and we try to avoid saturating * the buffer cache while potentially holding a vnode locked, so we - * check bwillwrite() before calling vn_rdwr() + * check bwillwrite() before calling vn_rdwr(). We also call uio_yield() + * to give other processes a chance to lock the vnode (either other processes + * core'ing the same binary, or unrelated processes scanning the directory). */ int vn_rdwr_inchunks(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, td) @@ -367,6 +369,7 @@ vn_rdwr_inchunks(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, td) break; offset += chunk; base += chunk; + uio_yield(); } while (len); if (aresid) *aresid += len; diff --git a/sys/sys/uio.h b/sys/sys/uio.h index 48f6c97..eec95a2 100644 --- a/sys/sys/uio.h +++ b/sys/sys/uio.h @@ -84,6 +84,7 @@ struct uio { struct vm_object; +void uio_yield __P((void)); int uiomove __P((caddr_t, int, struct uio *)); int uiomoveco __P((caddr_t, int, struct uio *, struct vm_object *)); int uioread __P((int, struct uio *, struct vm_object *, int *)); |
