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Fixed two cases where some parans were missing, resulting in some bogus

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logic. Slightly simplified allocbuf().
This commit is contained in:
David Greenman 1995-07-23 18:49:48 +00:00
parent 4ecffba61b
commit 31de6175b7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=9668
1 changed files with 16 additions and 18 deletions
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34
sys/kern/vfs_bio.c
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@ -18,7 +18,7 @@
* 5. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: vfs_bio.c,v 1.49 1995/07/17 06:26:07 davidg Exp $
* $Id: vfs_bio.c,v 1.50 1995/07/21 04:55:45 davidg Exp $
*/
/*
@ -383,7 +383,7 @@ brelse(struct buf * bp)
/* anyone need this block? */
if (bp->b_flags & B_WANTED) {
bp->b_flags &= ~B_WANTED | B_AGE;
bp->b_flags &= ~(B_WANTED | B_AGE);
wakeup((caddr_t) bp);
} else if (bp->b_flags & B_VMIO) {
bp->b_flags &= ~B_WANTED;
@ -546,7 +546,8 @@ vfs_bio_awrite(struct buf * bp)
for (i = 1; i < MAXPHYS / size; i++) {
if ((bpa = incore(vp, lblkno + i)) &&
((bpa->b_flags & (B_BUSY | B_DELWRI | B_BUSY | B_CLUSTEROK | B_INVAL)) == B_DELWRI | B_CLUSTEROK) &&
((bpa->b_flags & (B_BUSY | B_DELWRI | B_CLUSTEROK | B_INVAL)) ==
(B_DELWRI | B_CLUSTEROK)) &&
(bpa->b_bufsize == size)) {
if ((bpa->b_blkno == bpa->b_lblkno) ||
(bpa->b_blkno != bp->b_blkno + (i * size) / DEV_BSIZE))
@ -835,7 +836,13 @@ loop:
* check for size inconsistancies
*/
if (bp->b_bcount != size) {
allocbuf(bp, size);
if (bp->b_flags & B_VMIO) {
allocbuf(bp, size);
} else {
bp->b_flags |= B_NOCACHE;
VOP_BWRITE(bp);
goto loop;
}
}
splx(s);
return (bp);
@ -1035,6 +1042,7 @@ allocbuf(struct buf * bp, int size)
vm_page_activate(m);
m->act_count = 0;
m->valid = 0;
bp->b_flags &= ~B_CACHE;
} else if (m->flags & PG_BUSY) {
int j;
@ -1071,20 +1079,10 @@ allocbuf(struct buf * bp, int size)
bp->b_pages[pageindex] = m;
curbpnpages = pageindex + 1;
}
if (bsize >= PAGE_SIZE) {
for (i = bp->b_npages; i < curbpnpages; i++) {
m = bp->b_pages[i];
if (m->valid == 0) {
bp->b_flags &= ~B_CACHE;
}
m->bmapped++;
PAGE_WAKEUP(m);
}
} else {
if (!vm_page_is_valid(bp->b_pages[0], off, bsize))
bp->b_flags &= ~B_CACHE;
bp->b_pages[0]->bmapped++;
PAGE_WAKEUP(bp->b_pages[0]);
for (i = bp->b_npages; i < curbpnpages; i++) {
m = bp->b_pages[i];
m->bmapped++;
PAGE_WAKEUP(m);
}
bp->b_npages = curbpnpages;
bp->b_data = buffers_kva + (bp - buf) * MAXBSIZE;