Date: Sat, 14 Feb 1998 18:57:37 -0800 From: Mike Smith <mike@smith.net.au> To: Amancio Hasty <hasty@rah.star-gate.com> Cc: current@FreeBSD.ORG Subject: Re: about my last panic Message-ID: <199802150257.SAA00648@dingo.cdrom.com> In-Reply-To: Your message of "Sat, 14 Feb 1998 16:59:05 PST." <199802150059.QAA13152@rah.star-gate.com>
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What sort of "heavy" I/O are you talking about here? Are you swapping
on this sucker? Is it actually getting a null transfer?
> Forgot to include this:
>
> 419 void wfdstrategy (struct buf *bp)
> 420 {
> 421 int lun = UNIT(bp->b_dev);
> 422 struct wfd *t = wfdtab[lun];
> 423 int x;
> 424
> (kgdb)
> 425 /* If it's a null transfer, return immediatly. */
> 426 if (bp->b_bcount == 0) {
> 427 bp->b_resid = 0;
> 428 biodone (bp);
> 429 return;
> 430 }
> (kgdb) print *bp
> $4 = {b_hash = {le_next = 0x0, le_prev = 0x0}, b_vnbufs = {
> le_next = 0x87654321, le_prev = 0x0}, b_freelist = {tqe_next = 0x0,
> tqe_prev = 0x0}, b_act = {tqe_next = 0x0, tqe_prev = 0x0},
> b_proc = 0xf022b7bc, b_flags = 67108944, b_qindex = 0,
> b_usecount = 0 '\000', b_error = 0, b_bufsize = 4096, b_bcount = 4096,
> b_resid = 0, b_dev = 256, b_data = 0xf39cf000 "", b_kvabase = 0x0,
> b_kvasize = 0, b_lblkno = 0, b_blkno = 544,
> b_iodone = 0xf01af970 <swap_pager_iodone>, b_iodone_chain = 0x0,
> b_vp = 0xf479c560, b_dirtyoff = 0, b_dirtyend = 4096, b_generation = 0,
> b_rcred = 0xf068ac00, b_wcred = 0xf068ac00, b_validoff = 0, b_validend = 0,
> b_pblkno = 0, b_saveaddr = 0x0, b_savekva = 0x0, b_driver1 = 0x0,
> b_driver2 = 0x0, b_spc = 0xf02163dc, b_cluster = {cluster_head = {
> tqh_first = 0x0, tqh_last = 0x0}, cluster_entry = {tqe_next = 0x0,
> tqe_prev = 0x0}}, b_pages = {0x0 <repeats 32 times>}, b_npages = 0}
>
> Tnks,
> Amancio
>
>
>
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--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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