Re: [PATCH] deadlock when swapping to FAT

[Mikulas Patocka]

On Sun, 15 Mar 2009, OGAWA Hirofumi wrote:

> Mikulas Patocka <mpatocka@xxxxxxxxxx> writes:
> 
> > Note that the same race condition is happening in all the other 
> > filesystems. Maybe move that i_alloc_sem up to ->bmap method caller?
> 
> It can be. However, I guess locking strategy would be per
> filesystems. Because the fs may be using i_alloc_sem in get_block
> already.

Which ones take it in get_block? I grepped for i_alloc_sem and don't see 
them. Besides, it is mostly taken only for read and recursive taking of 
read-lock for read is allowed. It is taken for writes only in truncate.

Mikulas

> Thanks.
> -- 
> OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
> 
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