Re: [PATCH] Use of getblk differs between locations

[Jamie Lokier]

Mikulas Patocka wrote:
> That is possible ... you must also make sure that you do not hold an 
> important semaphore while waiting for some removable device (auditing VFS 
> for this will be a bit harder...)

If any filesystem is holding any _global_ semaphores while waiting for
an I/O to complete - that's a major bug already.

Activity which may take a long time due to slow I/O on one filesystem
shouldn't block activity on other, unrelated filesystems, apart from
global resource competition such as numbers of dirty pages...

-- Jamie
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