d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

1) Check for curproc != NULL in bread/bwrite. John convinced me that this

Browse Source 
is necessary in order for panic+sync to work. Will also gloss over a panic
that Jordan was having with the install floppies that remains unexplainable.
2) Handle "bogus_page" a little better.
3) Set page protection to VM_PROT_NONE if the entire page has become !valid.

Submitted by:	John Dyson (2&3), me (1).
This commit is contained in:
David Greenman 1995-04-16 05:11:14 +00:00
parent 8cbf8eafa6
commit d94a4c0434
1 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sys/kern/vfs_bio.c
View File

@ -18,7 +18,7 @@
* 5. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: vfs_bio.c,v 1.38 1995/03/27 00:11:45 davidg Exp $
* $Id: vfs_bio.c,v 1.39 1995/04/09 06:02:43 davidg Exp $
*/
/*
@ -402,7 +402,12 @@ brelse(struct buf * bp)
for (i = 0; i < bp->b_npages; i++) {
m = bp->b_pages[i];
if (m == bogus_page) {
panic("brelse: bogus page found");
m = vm_page_lookup(obj, foff);
if (!m) {
panic("brelse: page missing\n");
}
bp->b_pages[i] = m;
pmap_qenter(trunc_page(bp->b_data), bp->b_pages, bp->b_npages);
}
resid = (m->offset + PAGE_SIZE) - foff;
if (resid > iototal)
@ -410,6 +415,8 @@ brelse(struct buf * bp)
if (resid > 0) {
if (bp->b_flags & (B_ERROR | B_NOCACHE)) {
vm_page_set_invalid(m, foff, resid);
if (m->valid == 0)
vm_page_protect(m, VM_PROT_NONE);
}
}
foff += resid;
@ -736,7 +743,7 @@ getblk(struct vnode * vp, daddr_t blkno, int size, int slpflag, int slptimeo)
#if defined(VFS_BIO_DEBUG)
printf("getblk: invalid buffer size: %ld\n", bp->b_bcount);
#endif
bp->b_flags |= B_INVAL;
bp->b_flags |= B_NOCACHE;
(void) VOP_BWRITE(bp);
goto loop;
}