Commit 3cec5c77 authored by Jeff Roberson's avatar Jeff Roberson
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Move the dirty queues inside the per-domain structure. This resolves a bug

where we had not hit global dirty limits but a single queue was starved
for space by dirty buffers.  A single buf_daemon is maintained for now.

Add a bd_speedup() when we are low on bufspace.  This can happen due to SUJ
keeping many bufs locked until a cg block is written.  Document this with
a comment.

Fix sysctls to work with per-domain variables.  Add more ddb debugging.

Reported by:	pho
Reviewed by:	kib
Tested by:	pho
Sponsored by:	Netflix, Dell/EMC Isilon
Differential Revision:
parent b521cf27
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