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Kirill Smelkov
wendelin.core
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9ca80a2a
Commit
9ca80a2a
authored
Jun 27, 2019
by
Kirill Smelkov
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wcfs/notes.txt
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9ca80a2a
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@@ -174,11 +174,11 @@ Kernel locks page on read/cache store/... - we have to be careful not to deadloc
=================================================================================
The kernel, when doing FUSE operations, locks corresponding pages. For example
it locks a page, where it is going to read data, before issuing FUSE read
it locks a page, where it is going to read data
into
, before issuing FUSE read
request. Correspondingly, on e.g. cache store, the kernel also locks page where
data has to be stored.
It is easy to deadlock
,
if we don't take this locks into account. For example
It is easy to deadlock if we don't take this locks into account. For example
if we try to upload data to kernel pagecache from under serving read request,
this can deadlock.
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