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Groups > linux.kernel > #1240018

[PATCHv2 0/1] Update SCSI hosts to use idr for host number mgmt

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This patch updates the SCSI hosts module to use the idr
index-management routines to manage its host_no index instead
of using an ATOMIC integer. This means that host numbers
can now be reclaimed and re-used.

It also updates the hosts module to use the idr routine idr_find()
to lookup hosts based on the host number, hopefully speeding
up said lookup.

After noticing that my idr calling sequences where very close
to those in other modules, I considered creating some idr helper
functions (and using them), but because idr usage almost always
requires the caller to manage their own locks, I gave up on
this approach (as suggested by Tejon -- thank you).

Lee Duncan (1):
  SCSI: update hosts module to use idr index management

 drivers/scsi/hosts.c | 60 +++++++++++++++++++++++++---------------------------
 1 file changed, 29 insertions(+), 31 deletions(-)

-- 
2.1.4

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[PATCHv2 0/1] Update SCSI hosts to use idr for host number mgmt Lee Duncan <lduncan@suse.com> - 2015-10-06 01:10 +0200
  [PATCHv2 1/1] SCSI: update hosts module to use idr index management Lee Duncan <lduncan@suse.com> - 2015-10-06 01:10 +0200
    Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management Christoph Hellwig <hch@infradead.org> - 2015-10-06 11:50 +0200
      Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management James Bottomley <James.Bottomley@HansenPartnership.com> - 2015-10-06 19:20 +0200
        Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management Hannes Reinecke <hare@suse.com> - 2015-10-07 22:30 +0200
          Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management James Bottomley <James.Bottomley@HansenPartnership.com> - 2015-10-08 01:40 +0200
      Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management Lee Duncan <lduncan@suse.com> - 2015-10-06 19:20 +0200
    Re: [PATCHv2 1/1] SCSI: update hosts module to use idr index  management Hannes Reinecke <hare@suse.com> - 2015-10-06 15:10 +0200

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