[9050] in linux-scsi channel archive
bread & bottom halves in SMP
daemon@ATHENA.MIT.EDU (P.Basker)
Wed Jun 21 10:39:14 2000
Date: Wed, 21 Jun 2000 20:02:24 +0530 (IST)
From: "P.Basker" <basker_p@bbv.satyam.com>
To: linux-scsi@vger.rutgers.edu
Message-ID: <Pine.LNX.4.21.0006212002110.4927-100000@archimedes.bbv.satyam.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Hello All,
Im running 6.2 RH (2.2.14 smp ) on Intel SMP and non SMP machines
with PII and PIII
Ive written a small kernel module which executes the following
operations in the tq_scheduler bottom halves. I suppose they are safe
enough. But if Im wrong please correct me. Here is the pseudocode ( not c)
void task(void) {
if (current == "kswapd" || current == "kupdated"...etc) {
queue task again
exit
}
for(i=0;i<100;i++){
bh = bread();
invoke an rpc call to send the bh->b_data
}
queue task again;
}
This code worked well in non-smp machines but stumbles badly in SMP ones
. Please Guide me ? SMP crash leaves me no clues it simply either freezes
or gives oops which never appeares in /var/log/messages
Please CC to me as Im not on this list.
Animesh & Basker
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