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scst_vdisk: Set REQ_PRIO for SCSI commands marked as head-of-queue

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REQ_PRIO requests preempt others in the CFQ I/O scheduler. REQ_META marks
metadata requests for blktrace.

Reported-by: Lev Vainblat <lev@zadarastorage.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8579 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-09-07 03:55:23 +00:00
parent 1821c5a2de
commit 35cd068962
1 changed files with 1 additions and 1 deletions
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2
scst/src/dev_handlers/scst_vdisk.c
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@@ -5972,7 +5972,7 @@ defined(CONFIG_SUSE_KERNEL) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0) || \
defined(CONFIG_SUSE_KERNEL) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
bio->bi_opf |= REQ_META;
bio->bi_opf |= REQ_PRIO;
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) || \
(defined(RHEL_MAJOR) && \
(RHEL_MAJOR -0 > 6 || RHEL_MAJOR -0 == 6 && RHEL_MINOR -0 > 0))