SRU request for LP#235889
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889
SRU justification: Impact: When starting up the Areca 1220 PCIe card webconfig tool the system locks up with: BUG: scheduling while atomic: archhttp64/7146/0x1000000001 BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146] BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146] Fix: Softlockup is caused by arcmsr_iop_message_xfer() being called from atomic context under the queuecommand scsi_host_template handler. The current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are in atomic context, secondly this memory is not used for DMA. The patch attached corrects these issues. Patch from upstream commit: 69e562c234440fb7410877b5b24f4b29ef8521d1 Testcase: Starting up Areca card with webconfig tool, system will lockup without the patch. Tested and verified OK by user from PPA kernel: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889/comments/22 Patch attached -- kernel-team mailing list kernel-team@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kernel-team |
SRU request for LP#235889
Colin Ian King wrote:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889 > > SRU justification: > > Impact: When starting up the Areca 1220 PCIe card webconfig tool the > system locks up with: > > BUG: scheduling while atomic: archhttp64/7146/0x1000000001 > BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146] > BUG: soft lockup - CPU#0 stuck for 11s! [archhttp64:7146] > > Fix: Softlockup is caused by arcmsr_iop_message_xfer() being > called from atomic context under the queuecommand scsi_host_template > handler. The current GFP_KERNEL|GFP_DMA flags are wrong: firstly we are > in atomic context, secondly this memory is not used for DMA. The patch > attached corrects these issues. > > Patch from upstream commit: > 69e562c234440fb7410877b5b24f4b29ef8521d1 > > Testcase: Starting up Areca card with webconfig tool, system will lockup > without the patch. > > Tested and verified OK by user from PPA kernel: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235889/comments/22 > > Patch attached > > ACK -- Tim Gardner tim.gardner@ubuntu.com -- kernel-team mailing list kernel-team@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kernel-team |
| All times are GMT. The time now is 10:42 AM. |
VBulletin, Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.