Re: 2.6.20 kernel hang with USB drive and vfat doing ftruncate
Kumar Gala <[email protected]>
| Newsgroups | gmane.linux.usb.devel,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
On Feb 21, 2007, at 3:31 PM, Andrew Morton wrote: > On Wed, 21 Feb 2007 16:22:17 -0500 (EST) > Alan Stern <[email protected]> wrote: > >> On Wed, 21 Feb 2007, Andrew Morton wrote: >> >>>>> It seems like usb-storage and aio are completely off in the weeds. >>>>> Ideas? >>>> >>>> It seems usb-storage should remove some kmalloc and use mempool >>>> () for >>>> urb... Is someone working on this? And idea? >>> >>> I think Pete said that we're supposed to be using GFP_NOIO in there. >> >> We _are_ using it. > > How admirably prompt. > >>> Not that it'll help much: the VM calls throttle_vm_writeout() for >>> GFP_NOIO >>> and GFP_NOFS allocations, which is a bug. Because if the caller >>> holds >>> locks which prevent filesystem or IO progress, we deadlock. >>> >>> I'll fix the VM if someone else fixes USB ;) >> >> What else needs to be fixed? > > Would be nice if someone can confirm that this fixes it: Doesn't seem to help my problem in a quick test, will get more data in the morning. - k ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel