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Date: Thu, 26 Apr 2012 15:50:14 GMT
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To: freebsd-bugs@FreeBSD.org
From: Radim Kolar <hsn@filez.com>
Cc: 
Subject: Re: kern/166780: patch for 10.X
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The following reply was made to PR kern/166780; it has been noted by GNATS.

From: Radim Kolar <hsn@filez.com>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/166780: patch for 10.X
Date: Thu, 26 Apr 2012 17:46:17 +0200

 Index: sys/vm/swap_pager.c
 ===================================================================
 --- sys/vm/swap_pager.c (revision 234696)
 +++ sys/vm/swap_pager.c (working copy)
 @@ -2692,3 +2692,20 @@
              NODEV);
          return (0);
   }
 +
 +
 +static int
 +sysctl_vm_swap_free(SYSCTL_HANDLER_ARGS) {
 +     int64_t swap_free = 0;
 +     struct swdevt *sp;
 +
 +     mtx_lock(&sw_dev_mtx);
 +     TAILQ_FOREACH(sp, &swtailq, sw_list) {
 +       swap_free += sp->sw_nblks - sp->sw_used;
 +     }
 +     mtx_unlock(&sw_dev_mtx);
 +     swap_free *= PAGE_SIZE;
 +     return SYSCTL_OUT(req, &swap_free, sizeof(swap_free));
 +}
 +SYSCTL_OID(_vm, OID_AUTO, swap_free, CTLTYPE_S64|CTLFLAG_RD|CTLFLAG_MPSAFE,
 +          NULL, 0, sysctl_vm_swap_free, "Q", "Amount of free swap 
 storage.");