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Use sysconf to determine actual page size for msync

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Also added comments in tests around testing for msync offsets/lengths.
This commit is contained in:
Patrick J Cherry
2018-02-06 07:32:58 +00:00
parent 6d6948af09
commit 3a86870c9f
3 changed files with 15 additions and 6 deletions
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4
src/server/client.c
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@@ -480,8 +480,8 @@ void client_reply_to_write( struct client* client, struct nbd_request request )
// Only flush if FUA is set
if (request.flags & CMD_FLAG_FUA)
{
/* multiple of 4K page size */
uint64_t from_rounded = request.from & (~0xfff);
/* multiple of page size */
uint64_t from_rounded = request.from & (~(sysconf(_SC_PAGE_SIZE)-1));
uint64_t len_rounded = request.len + (request.from - from_rounded);
debug("Calling msync from=%"PRIu64", len=%"PRIu64"",from_rounded, len_rounded);