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| author | alc <alc@FreeBSD.org> | 2010-05-03 05:41:50 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2010-05-03 05:41:50 +0000 |
| commit | 387e15c45aad8ee988d094eebcf76078a1a4752c (patch) | |
| tree | 63203bfa05c5420331af4dfe5225e91b49587bae /sys/kern/uipc_cow.c | |
| parent | 46340f07933ebae5d0723021a44679b64cb1013b (diff) | |
| download | FreeBSD-src-387e15c45aad8ee988d094eebcf76078a1a4752c.zip FreeBSD-src-387e15c45aad8ee988d094eebcf76078a1a4752c.tar.gz | |
This is the first step in transitioning responsibility for synchronizing
access to the page's wire_count from the page queues lock to the page lock.
Submitted by: kmacy
Diffstat (limited to 'sys/kern/uipc_cow.c')
| -rw-r--r-- | sys/kern/uipc_cow.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/kern/uipc_cow.c b/sys/kern/uipc_cow.c index 5c0dcd2..88a5625 100644 --- a/sys/kern/uipc_cow.c +++ b/sys/kern/uipc_cow.c @@ -80,6 +80,7 @@ socow_iodone(void *addr, void *args) pp = sf_buf_page(sf); sf_buf_free(sf); /* remove COW mapping */ + vm_page_lock(pp); vm_page_lock_queues(); vm_page_cowclear(pp); vm_page_unwire(pp, 0); @@ -91,6 +92,7 @@ socow_iodone(void *addr, void *args) if (pp->wire_count == 0 && pp->object == NULL) vm_page_free(pp); vm_page_unlock_queues(); + vm_page_unlock(pp); socow_stats.iodone++; } @@ -149,6 +151,7 @@ socow_setup(struct mbuf *m0, struct uio *uio) */ sf = sf_buf_alloc(pp, SFB_CATCH); if (!sf) { + vm_page_lock(pp); vm_page_lock_queues(); vm_page_cowclear(pp); vm_page_unwire(pp, 0); @@ -160,6 +163,7 @@ socow_setup(struct mbuf *m0, struct uio *uio) if (pp->wire_count == 0 && pp->object == NULL) vm_page_free(pp); vm_page_unlock_queues(); + vm_page_unlock(pp); socow_stats.fail_sf_buf++; return(0); } |
