Neil Brown <[EMAIL PROTECTED]> writes: > This is difficult. > > Summary of problem is: > Filesystem on LVM on md/raid1 > Add an md/linear to the md/raid1 and fs dies with 'bio too big'. > > [...] > > You can probably make your array work by adding the md/linear array to > the md/raid1 *before* enabling the LVM device on top of it. However > that isn't really a good long-term solution.
Thanks for the explanations ! That's the kind of solution i did use. But it seems I achieved to add the md/linear array to the md/raid1 after lvm was enabled, I only have to not to use an initrd. the kernel I'm using at the moment is a 2.6.18-4-vserver-xen (debian one) plus the following patches: - dm-io-fix-bi_max_vecs.patch - dm-merge-max_hw_sector.patch also i'm using #define RESYNC_BLOCK_SIZE PAGE_SIZE rather than (64*1024) in raid1.c. Not sure if that could explain the fact i was able to add the md/linear array to the md/raid1 after enabling lvm. (still i had not to use an initrd) When I have more time I'll try to reproduce this on a test machine. > We really need better ways for stacked devices to communicate. > > Alasdair Kergon (dm developer) has some patches to make it practical > to recursively call merge_bvec_fn so they might be part of the > solution, but more discussion is needed before that becomes a reality. Ok, i'd be curious to test them (if they're usable and publicly available) > Sorry I cannot be more helpful at this stage. Thanks. (at least i understand(-ish) what's going on) ;-) -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
