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scst/README: Make the description of the async flag more clear

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8266 d57e44dd-8a1f-0410-8b47-8ef2f437770f
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Bart Van Assche
2019-04-21 18:34:26 +00:00
parent 61ab007c04
commit 7556420a31
1 changed files with 3 additions and 1 deletions
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scst/README
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@@ -1155,7 +1155,9 @@ cache. The following parameters possible for vdisk_fileio:
- async - submit I/O asynchronously to the device handler. This mode
allows concurrent processing of SCSI commands even when using only
a single SCST command thread.
a single SCST command thread. This mode is only supported for kernel
version 4.1 and later. RHEL 8 is the first RHEL version that supports
in-kernel asynchronous file I/O.
- o_direct - disables both read and write caching if asynchronous
I/O is used. This mode bypasses the page cache and hence improves