Bug 67198

Summary: kernel 2.4.18-5 short on DMA buffers
Product: [Retired] Red Hat Linux Reporter: acount closed by user <a1459440>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3   
Target Milestone: ---   
Target Release: ---   
Hardware: athlon   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-06-08 16:06:47 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
dmesg
none
interrupts
none
iomem
none
ioports
none
lsmod
none
lspci-vvv none

Description acount closed by user 2002-06-20 20:48:54 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/4.79 [en] (X11; U; Linux 2.4.18-5 i686)

Description of problem:
dd if=/dev/zero of=pepe 

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. dd if=/dev/zero of=pepe
2. Jun 20 22:24:34 querida kernel: Warning - running *really* short on DMA
buffers
3. Jun 20 22:24:34 querida kernel: (scsi0:A:0:0): Locking max tag count at 128



Additional info:
Comment 1 acount closed by user 2002-06-20 21:06:10 UTC 
Created attachment 61965 [details]
dmesg
Comment 2 acount closed by user 2002-06-20 21:06:59 UTC 
Created attachment 61966 [details]
interrupts
Comment 3 acount closed by user 2002-06-20 21:07:27 UTC 
Created attachment 61967 [details]
iomem
Comment 4 acount closed by user 2002-06-20 21:07:55 UTC 
Created attachment 61968 [details]
ioports
Comment 5 acount closed by user 2002-06-20 21:08:23 UTC 
Created attachment 61969 [details]
lsmod
Comment 6 acount closed by user 2002-06-20 21:08:52 UTC 
Created attachment 61970 [details]
lspci-vvv
Comment 7 Arjan van de Ven 2002-06-20 22:31:23 UTC 
did the kernel survive ?
Comment 8 acount closed by user 2002-06-20 23:31:06 UTC 
Yes, the system is running
Comment 9 Arjan van de Ven 2002-06-21 08:47:16 UTC 
This message basically means 
"uh oh, I'm getting close to being in trouble here"
which I've seen on scsi systems on sudden, spiked load shortly after boot.
If this happens a lot there's a problem, since it *CAN* go into too much
trouble, however it's an early warning, not a final one... So if this doesn't
happen again, not a problem. If it happens a lot, then there's a real issue
Comment 10 acount closed by user 2002-06-21 20:39:58 UTC 
it happen _every_ time that i run dd, and a pile of messages are showed at the
console
Comment 11 acount closed by user 2003-06-08 16:06:47 UTC 
with 2.4.20-18.9 there is not problem