[arvados] updated: 2.7.2-14-g4c1e916cff

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Summary of changes:
 sdk/python/arvados/diskcache.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

       via  4c1e916cff3cae8c384b34295f346e522e0672f2 (commit)
      from  de6342dbb0832783f7279fa1cbc78e65e80f1db4 (commit)

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commit 4c1e916cff3cae8c384b34295f346e522e0672f2
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Thu May 23 21:34:08 2024 -0400

    Turns out madvise isn't in Python 3.7
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/sdk/python/arvados/diskcache.py b/sdk/python/arvados/diskcache.py
index 528a7d28b5..58199b4a53 100644
--- a/sdk/python/arvados/diskcache.py
+++ b/sdk/python/arvados/diskcache.py
@@ -39,7 +39,7 @@ class DiskCacheSlot(object):
         # just a few pages at a time), reducing the number of page
         # faults and improving performance by 4x compared to not
         # calling madvise.
-        if self.content:
+        if self.content and hasattr(mmap.mmap, 'madvise'):
             self.content.madvise(mmap.MADV_WILLNEED)
         return self.content
 

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