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Update the main loop in the flushbuflist() routine to properly select

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buffers for flushing when requested to flush both normal and extended
attributes buffers.

Sponsored by: Netflix
This commit is contained in:
Kirk McKusick 2019-03-11 22:42:33 +00:00
parent 809a8352dd
commit c11cbfd957
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=345037
1 changed files with 10 additions and 2 deletions
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12
sys/kern/vfs_subr.c
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@ -1756,8 +1756,16 @@ flushbuflist(struct bufv *bufv, int flags, struct bufobj *bo, int slpflag,
retval = 0;
TAILQ_FOREACH_SAFE(bp, &bufv->bv_hd, b_bobufs, nbp) {
if (((flags & V_NORMAL) && (bp->b_xflags & BX_ALTDATA)) ||
((flags & V_ALT) && (bp->b_xflags & BX_ALTDATA) == 0)) {
/*
* If we are flushing both V_NORMAL and V_ALT buffers then
* do not skip any buffers. If we are flushing only V_NORMAL
* buffers then skip buffers marked as BX_ALTDATA. If we are
* flushing only V_ALT buffers then skip buffers not marked
* as BX_ALTDATA.
*/
if (((flags & (V_NORMAL | V_ALT)) != (V_NORMAL | V_ALT)) &&
(((flags & V_NORMAL) && (bp->b_xflags & BX_ALTDATA) != 0) ||
((flags & V_ALT) && (bp->b_xflags & BX_ALTDATA) == 0))) {
continue;
}
if (nbp != NULL) {