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Prevent a panic that happens on SMP machines when removing a disk with

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many writes queued up.

Reviewed by:	phk, scottl
Approved by:	rwatson (mentor)
Sponsored by:	FreeBSD Foundation
This commit is contained in:
Edward Tomasz Napierala 2009-01-11 13:51:04 +00:00
parent 56035520b7
commit 38153e80f7
1 changed files with 11 additions and 1 deletions
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12
sys/geom/geom_vfs.c
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@ -71,6 +71,16 @@ g_vfs_done(struct bio *bip)
struct buf *bp;
int vfslocked;
/*
* Provider ('bio_to') could have withered away sometime
* between incrementing the 'nend' in g_io_deliver() and now,
* making 'bio_to' a dangling pointer. We cannot do that
* in g_wither_geom(), as it would require going over
* the 'g_bio_run_up' list, resetting the pointer.
*/
if (bip->bio_from->provider == NULL)
bip->bio_to = NULL;
if (bip->bio_error) {
printf("g_vfs_done():");
g_print_bio(bip);
@ -136,7 +146,7 @@ g_vfs_orphan(struct g_consumer *cp)
g_detach(cp);
/*
* Do not destroy the geom. Filesystem will do this during unmount.
* Do not destroy the geom. Filesystem will do that during unmount.
*/
}