[mythtv-users] Mythbackend: page allocation failure

[Khanh Tran]

Kernel is 2.6.8.  I'm running SuSE 9.2 (2.6.8-24.14).

I chose XFS because I read on a MythTV thread somewhere that it handled
large files well.

-Khanh

> -----Original Message-----
> From: Fedor Pikus [mailto:fpikus at gmail.com] 
> Sent: Tuesday, June 14, 2005 12:16 PM
> To: khanh at khanh.net; Discussion about mythtv
> Subject: Re: [mythtv-users] Mythbackend: page allocation failure
> 
> On 6/14/05, Khanh Tran <khanh at slc.edu> wrote:
> > I keep getting the following errors in my kernel messages.  Also,
> > playback from pre-recorded files is starting to get unstable.
> > Mythcommflag processes also seem to never end.  Can anyone tell me
> > what's going on and how to fix this?
> 
> Which kernel version? There are bugs filed against XFS with similar
> problems, seems to be a known issue occuring with XFS under high
> loads. It is *supposed* to be recoverable, but it will pause your
> system for several seconds, probably not good for recording in real
> time. Commflagger may get confused by pauses and takes forever trying
> to slice your recordings to ribbons.
> 
> > 
> > Thanks!
> > 
> > mythbackend: page allocation failure. order:4, mode:0x50
> >  [<c013a790>] __alloc_pages+0x400/0x470
> >  [<c013a818>] __get_free_pages+0x18/0x30
> >  [<c013d569>] kmem_getpages+0x19/0xb0
> >  [<c013e084>] cache_grow+0x84/0x120
> >  [<c013e24a>] cache_alloc_refill+0x12a/0x1e0
> >  [<c013e66c>] __kmalloc+0x5c/0x60
> >  [<ece14650>] kmem_alloc+0x50/0xc0 [xfs]
> >  [<ece14747>] kmem_realloc+0x17/0x60 [xfs]
> >  [<ecdf69c7>] xfs_iext_realloc+0x87/0xe0 [xfs]
> >  [<ecdcf025>] xfs_bmap_insert_exlist+0x25/0x70 [xfs]
> >  [<ecdc9bd6>] xfs_bmap_add_extent_delay_real+0x7f6/0x1310 [xfs]
> >  [<ece0af94>] xfs_trans_log_inode+0x14/0x40 [xfs]
> >  [<ecdcd207>] xfs_bmap_alloc+0xf77/0x1b00 [xfs]
> >  [<ecdd7aba>] xfs_bmbt_get_state+0xa/0x20 [xfs]
> >  [<ecdc93cc>] xfs_bmap_add_extent+0x3fc/0x410 [xfs]
> >  [<ece147cb>] kmem_zone_alloc+0x3b/0x90 [xfs]
> >  [<ecdd0feb>] xfs_bmapi+0x73b/0x1710 [xfs]
> >  [<ecdf9898>] xfs_iomap_write_delay+0x638/0x7b0 [xfs]
> >  [<ecdd7aba>] xfs_bmbt_get_state+0xa/0x20 [xfs]
> >  [<ecdcf481>] xfs_bmap_do_search_extents+0x121/0x440 [xfs]
> >  [<ecdf9c24>] xfs_iomap_write_allocate+0x214/0x4a0 [xfs]
> >  [<c02436da>] elv_merged_request+0xa/0x10
> >  [<c024668e>] __make_request+0x4be/0x4d0
> >  [<ecdf8ab7>] xfs_iomap+0x157/0x440 [xfs]
> >  [<ecdf8d91>] xfs_iomap+0x431/0x440 [xfs]
> >  [<c0155426>] bio_alloc+0xc6/0x1b0
> >  [<ece1be8a>] xfs_bmap+0x1a/0x20 [xfs]
> >  [<ece14999>] xfs_map_blocks+0x29/0x50 [xfs]
> >  [<ece15741>] xfs_page_state_convert+0x491/0x5a0 [xfs]
> >  [<c01d1220>] radix_tree_gang_lookup_tag+0x40/0x60
> >  [<ece15d1f>] linvfs_writepage+0x4f/0xe0 [xfs]
> > 
> > 
> > _______________________________________________
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> > mythtv-users at mythtv.org
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> > 
> > 
> > 
> 
> 
> -- 
> Fedor G Pikus (fpikus at gmail.com)
> http://www.pikus.net
> http://wild-light.com
>